/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/array-examples/sorting_bubblesort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:01:21,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:01:21,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:01:21,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 23:01:22,041 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 [2019-11-23 23:01:22,069 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:01:22,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:01:22,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:01:22,070 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:01:22,070 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:01:22,070 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:01:22,071 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:01:22,071 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:01:22,072 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:01:22,072 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:01:22,072 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:01:22,072 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:01:22,073 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:01:22,073 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:01:22,073 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:01:22,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:01:22,075 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:01:22,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:01:22,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:01:22,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:01:22,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:01:22,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:01:22,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:01:22,077 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:01:22,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:01:22,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:01:22,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:01:22,078 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:01:22,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:01:22,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:01:22,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:01:22,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:01:22,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:01:22,081 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:01:22,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:01:22,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:01:22,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:01:22,082 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:01:22,392 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:01:22,415 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:01:22,418 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:01:22,420 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:01:22,420 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:01:22,421 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2019-11-23 23:01:22,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2b8ae505/6870c8a2ae92494ba394cd1525699811/FLAG453891cd6 [2019-11-23 23:01:22,957 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:01:22,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2019-11-23 23:01:22,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2b8ae505/6870c8a2ae92494ba394cd1525699811/FLAG453891cd6 [2019-11-23 23:01:23,336 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2b8ae505/6870c8a2ae92494ba394cd1525699811 [2019-11-23 23:01:23,347 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:01:23,348 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:01:23,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:01:23,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:01:23,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:01:23,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:01:23" (1/1) ... [2019-11-23 23:01:23,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b0be97d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:23, skipping insertion in model container [2019-11-23 23:01:23,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:01:23" (1/1) ... [2019-11-23 23:01:23,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:01:23,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:01:23,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:01:23,608 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:01:23,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:01:23,652 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:01:23,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:23 WrapperNode [2019-11-23 23:01:23,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:01:23,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:01:23,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:01:23,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:01:23,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:23" (1/1) ... [2019-11-23 23:01:23,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:23" (1/1) ... [2019-11-23 23:01:23,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:01:23,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:01:23,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:01:23,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:01:23,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:23" (1/1) ... [2019-11-23 23:01:23,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:23" (1/1) ... [2019-11-23 23:01:23,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:23" (1/1) ... [2019-11-23 23:01:23,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:23" (1/1) ... [2019-11-23 23:01:23,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:23" (1/1) ... [2019-11-23 23:01:23,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:23" (1/1) ... [2019-11-23 23:01:23,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:23" (1/1) ... [2019-11-23 23:01:23,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:01:23,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:01:23,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:01:23,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:01:23,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:23" (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 [2019-11-23 23:01:23,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:01:23,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:01:23,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:01:23,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:01:23,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:01:23,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:01:24,291 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:01:24,292 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 23:01:24,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:01:24 BoogieIcfgContainer [2019-11-23 23:01:24,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:01:24,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:01:24,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:01:24,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:01:24,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:01:23" (1/3) ... [2019-11-23 23:01:24,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ee17a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:01:24, skipping insertion in model container [2019-11-23 23:01:24,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:23" (2/3) ... [2019-11-23 23:01:24,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ee17a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:01:24, skipping insertion in model container [2019-11-23 23:01:24,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:01:24" (3/3) ... [2019-11-23 23:01:24,300 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2019-11-23 23:01:24,308 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:01:24,314 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:01:24,325 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:01:24,348 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:01:24,348 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:01:24,348 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:01:24,348 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:01:24,348 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:01:24,348 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:01:24,349 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:01:24,349 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:01:24,363 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 23:01:24,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:01:24,369 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:24,370 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:24,370 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:24,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:24,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1113561416, now seen corresponding path program 1 times [2019-11-23 23:01:24,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:24,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853934728] [2019-11-23 23:01:24,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:01:24,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853934728] [2019-11-23 23:01:24,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:01:24,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:01:24,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941771462] [2019-11-23 23:01:24,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:01:24,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:01:24,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:01:24,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:01:24,559 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 23:01:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:01:24,585 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-23 23:01:24,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:01:24,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:01:24,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:01:24,597 INFO L225 Difference]: With dead ends: 21 [2019-11-23 23:01:24,597 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 23:01:24,601 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 [2019-11-23 23:01:24,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 23:01:24,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 23:01:24,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 23:01:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2019-11-23 23:01:24,635 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 7 [2019-11-23 23:01:24,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:01:24,636 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2019-11-23 23:01:24,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:01:24,637 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2019-11-23 23:01:24,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:01:24,637 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:24,637 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:24,638 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:24,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:24,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1494254419, now seen corresponding path program 1 times [2019-11-23 23:01:24,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:24,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964170492] [2019-11-23 23:01:24,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:01:24,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964170492] [2019-11-23 23:01:24,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:01:24,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:01:24,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075143088] [2019-11-23 23:01:24,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:01:24,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:01:24,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:01:24,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:01:24,697 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand 3 states. [2019-11-23 23:01:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:01:24,712 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2019-11-23 23:01:24,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:01:24,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 23:01:24,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:01:24,713 INFO L225 Difference]: With dead ends: 18 [2019-11-23 23:01:24,714 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:01:24,714 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:01:24,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:01:24,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 23:01:24,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:01:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-11-23 23:01:24,719 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2019-11-23 23:01:24,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:01:24,719 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-23 23:01:24,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:01:24,719 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2019-11-23 23:01:24,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:01:24,720 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:24,720 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:24,721 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:24,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:24,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1161994799, now seen corresponding path program 1 times [2019-11-23 23:01:24,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:24,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189777175] [2019-11-23 23:01:24,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:01:24,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189777175] [2019-11-23 23:01:24,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:01:24,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:01:24,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15831271] [2019-11-23 23:01:24,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:01:24,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:01:24,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:01:24,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:01:24,760 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 3 states. [2019-11-23 23:01:24,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:01:24,772 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2019-11-23 23:01:24,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:01:24,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 23:01:24,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:01:24,774 INFO L225 Difference]: With dead ends: 21 [2019-11-23 23:01:24,774 INFO L226 Difference]: Without dead ends: 13 [2019-11-23 23:01:24,775 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:01:24,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-23 23:01:24,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-23 23:01:24,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 23:01:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2019-11-23 23:01:24,779 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 10 [2019-11-23 23:01:24,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:01:24,780 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2019-11-23 23:01:24,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:01:24,780 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2019-11-23 23:01:24,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 23:01:24,781 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:24,781 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:24,781 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:24,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:24,782 INFO L82 PathProgramCache]: Analyzing trace with hash 788866081, now seen corresponding path program 1 times [2019-11-23 23:01:24,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:24,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498084377] [2019-11-23 23:01:24,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:01:24,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498084377] [2019-11-23 23:01:24,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041142330] [2019-11-23 23:01:24,856 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 [2019-11-23 23:01:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:24,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:01:24,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:01:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:01:24,964 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:01:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:01:24,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2114273484] [2019-11-23 23:01:25,042 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 23:01:25,043 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:01:25,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:01:25,059 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:01:25,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:01:51,082 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2019-11-23 23:01:51,230 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 237 [2019-11-23 23:01:51,375 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2019-11-23 23:01:51,493 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 240 [2019-11-23 23:01:57,195 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 254 [2019-11-23 23:02:13,774 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 299 [2019-11-23 23:02:32,617 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 337 [2019-11-23 23:02:34,969 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 339 [2019-11-23 23:02:35,209 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 341 [2019-11-23 23:02:35,427 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 345 [2019-11-23 23:02:38,025 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 349 [2019-11-23 23:02:40,333 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 355 [2019-11-23 23:02:40,444 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 353 [2019-11-23 23:02:43,142 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 358 [2019-11-23 23:02:45,643 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 364 [2019-11-23 23:02:45,767 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 362 [2019-11-23 23:02:48,311 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 368 [2019-11-23 23:02:48,446 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 363 [2019-11-23 23:02:48,678 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 363 [2019-11-23 23:02:48,803 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 365 [2019-11-23 23:02:48,917 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 366 [2019-11-23 23:02:51,516 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 370 [2019-11-23 23:02:51,635 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 371 [2019-11-23 23:02:54,426 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 375 [2019-11-23 23:02:54,580 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 374