/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_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:01:20,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:01:20,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:01:20,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:01:20,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:01:20,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:01:20,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:01:20,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:01:20,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:01:20,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:01:20,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:01:20,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-23 23:01:21,020 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 23:01:21,037 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:01:21,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:01:21,039 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:01:21,040 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:01:21,040 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:01:21,040 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:01:21,040 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:01:21,040 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:01:21,041 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:01:21,041 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:01:21,041 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:01:21,041 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:01:21,041 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:01:21,042 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:01:21,042 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:01:21,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:01:21,042 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:01:21,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:01:21,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:01:21,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:01:21,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:01:21,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:01:21,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:01:21,045 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:01:21,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:01:21,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:01:21,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:01:21,046 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:01:21,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:01:21,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:01:21,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:01:21,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:01:21,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:01:21,048 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:01:21,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:01:21,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:01:21,049 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:01:21,050 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:01:21,309 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:01:21,329 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:01:21,335 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:01:21,336 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:01:21,337 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:01:21,338 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i [2019-11-23 23:01:21,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f8fe4319/c73191e7bdfb4affaf2f88954cdf47d5/FLAG12263d362 [2019-11-23 23:01:21,871 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:01:21,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i [2019-11-23 23:01:21,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f8fe4319/c73191e7bdfb4affaf2f88954cdf47d5/FLAG12263d362 [2019-11-23 23:01:22,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f8fe4319/c73191e7bdfb4affaf2f88954cdf47d5 [2019-11-23 23:01:22,281 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:01:22,284 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:01:22,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:01:22,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:01:22,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:01:22,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bf32611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22, skipping insertion in model container [2019-11-23 23:01:22,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:01:22,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:01:22,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:01:22,503 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:01:22,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:01:22,541 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:01:22,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22 WrapperNode [2019-11-23 23:01:22,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:01:22,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:01:22,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:01:22,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:01:22,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,645 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:01:22,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:01:22,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:01:22,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:01:22,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:01:22,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:01:22,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:01:22,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:01:22,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (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 23:01:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:01:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:01:22,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:01:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:01:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:01:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:01:23,197 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:01:23,197 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 23:01:23,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:01:23 BoogieIcfgContainer [2019-11-23 23:01:23,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:01:23,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:01:23,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:01:23,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:01:23,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:01:22" (1/3) ... [2019-11-23 23:01:23,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383a49fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:01:23, skipping insertion in model container [2019-11-23 23:01:23,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (2/3) ... [2019-11-23 23:01:23,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383a49fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:01:23, skipping insertion in model container [2019-11-23 23:01:23,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:01:23" (3/3) ... [2019-11-23 23:01:23,206 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2019-11-23 23:01:23,214 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:01:23,220 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:01:23,228 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:01:23,248 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:01:23,248 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:01:23,248 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:01:23,248 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:01:23,248 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:01:23,249 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:01:23,249 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:01:23,249 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:01:23,260 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 23:01:23,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:01:23,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:23,267 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:23,267 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:23,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:23,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1113561416, now seen corresponding path program 1 times [2019-11-23 23:01:23,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:23,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603218754] [2019-11-23 23:01:23,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:23,432 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 23:01:23,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603218754] [2019-11-23 23:01:23,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:01:23,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:01:23,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018198674] [2019-11-23 23:01:23,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:01:23,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:01:23,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:01:23,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:01:23,463 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 23:01:23,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:01:23,496 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-23 23:01:23,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:01:23,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:01:23,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:01:23,509 INFO L225 Difference]: With dead ends: 21 [2019-11-23 23:01:23,510 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 23:01:23,513 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 23:01:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 23:01:23,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 23:01:23,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 23:01:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2019-11-23 23:01:23,561 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 7 [2019-11-23 23:01:23,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:01:23,562 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2019-11-23 23:01:23,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:01:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2019-11-23 23:01:23,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:01:23,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:23,564 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:23,564 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:23,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:23,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1494254419, now seen corresponding path program 1 times [2019-11-23 23:01:23,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:23,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635869857] [2019-11-23 23:01:23,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:23,662 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 23:01:23,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635869857] [2019-11-23 23:01:23,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:01:23,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:01:23,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497477836] [2019-11-23 23:01:23,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:01:23,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:01:23,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:01:23,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:01:23,667 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand 3 states. [2019-11-23 23:01:23,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:01:23,694 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2019-11-23 23:01:23,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:01:23,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 23:01:23,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:01:23,696 INFO L225 Difference]: With dead ends: 18 [2019-11-23 23:01:23,697 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:01:23,698 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 23:01:23,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:01:23,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 23:01:23,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:01:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-11-23 23:01:23,705 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2019-11-23 23:01:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:01:23,705 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-23 23:01:23,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:01:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2019-11-23 23:01:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:01:23,707 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:23,707 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:23,708 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:23,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:23,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1161994799, now seen corresponding path program 1 times [2019-11-23 23:01:23,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:23,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717673622] [2019-11-23 23:01:23,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:23,785 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 23:01:23,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717673622] [2019-11-23 23:01:23,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:01:23,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:01:23,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144917090] [2019-11-23 23:01:23,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:01:23,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:01:23,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:01:23,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:01:23,788 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 3 states. [2019-11-23 23:01:23,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:01:23,804 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2019-11-23 23:01:23,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:01:23,804 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 23:01:23,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:01:23,805 INFO L225 Difference]: With dead ends: 21 [2019-11-23 23:01:23,805 INFO L226 Difference]: Without dead ends: 13 [2019-11-23 23:01:23,806 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 23:01:23,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-23 23:01:23,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-23 23:01:23,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 23:01:23,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2019-11-23 23:01:23,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 10 [2019-11-23 23:01:23,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:01:23,811 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2019-11-23 23:01:23,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:01:23,812 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2019-11-23 23:01:23,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 23:01:23,812 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:23,812 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:23,813 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:23,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:23,813 INFO L82 PathProgramCache]: Analyzing trace with hash 788866081, now seen corresponding path program 1 times [2019-11-23 23:01:23,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:23,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330780710] [2019-11-23 23:01:23,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:23,876 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 23:01:23,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330780710] [2019-11-23 23:01:23,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707764081] [2019-11-23 23:01:23,878 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 23:01:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:23,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:01:23,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:01:23,993 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 23:01:23,994 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:01:24,018 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 23:01:24,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [389940531] [2019-11-23 23:01:24,044 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 23:01:24,045 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:01:24,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:01:24,058 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:01:24,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:01:54,221 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 272 [2019-11-23 23:01:54,360 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 270 [2019-11-23 23:01:58,493 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 281 [2019-11-23 23:02:00,486 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 288 [2019-11-23 23:02:02,657 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 293 [2019-11-23 23:02:02,886 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 290 [2019-11-23 23:02:03,031 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2019-11-23 23:02:03,181 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 293 [2019-11-23 23:02:09,509 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 306 [2019-11-23 23:02:11,830 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 309 [2019-11-23 23:02:14,037 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 311 [2019-11-23 23:02:14,261 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 315 [2019-11-23 23:02:16,246 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 322 [2019-11-23 23:02:16,387 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 316 [2019-11-23 23:02:16,616 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 317 [2019-11-23 23:02:18,907 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 320 [2019-11-23 23:02:19,132 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 323 [2019-11-23 23:02:21,559 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2019-11-23 23:02:21,684 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 327 [2019-11-23 23:02:23,951 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 330 [2019-11-23 23:02:24,086 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 329 [2019-11-23 23:02:24,215 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2019-11-23 23:02:24,327 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 332 [2019-11-23 23:02:26,741 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2019-11-23 23:02:26,891 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 337 [2019-11-23 23:02:29,541 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 341 [2019-11-23 23:02:29,666 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 339 [2019-11-23 23:02:29,904 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 340 [2019-11-23 23:02:30,034 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2019-11-23 23:02:30,154 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 344 [2019-11-23 23:02:32,878 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-23 23:02:33,011 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 349 [2019-11-23 23:02:36,135 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2019-11-23 23:02:36,269 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 353 [2019-11-23 23:02:38,640 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 360 [2019-11-23 23:02:38,862 WARN L192 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 356 [2019-11-23 23:02:41,563 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2019-11-23 23:02:41,697 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 359 [2019-11-23 23:02:44,293 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 367 [2019-11-23 23:02:44,437 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 361 [2019-11-23 23:02:44,586 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2019-11-23 23:02:44,707 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 364 [2019-11-23 23:02:47,621 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 368 [2019-11-23 23:02:47,763 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 368 [2019-11-23 23:02:50,435 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 385 [2019-11-23 23:02:50,604 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 382 [2019-11-23 23:02:50,753 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2019-11-23 23:02:50,895 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 384