java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:31:45,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:31:45,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:31:45,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:31:45,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:31:45,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:31:45,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:31:45,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:31:45,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:31:45,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:31:45,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:31:45,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:31:45,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:31:45,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:31:45,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:31:45,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:31:45,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:31:45,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:31:45,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:31:45,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:31:45,914 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:31:45,935 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:31:45,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:31:45,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:31:45,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:31:45,938 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:31:45,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:31:45,938 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:31:45,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:31:45,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:31:45,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:31:45,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:31:45,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:31:45,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:31:45,941 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:31:45,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:31:45,942 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:31:45,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:31:45,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:31:45,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:31:45,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:31:45,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:31:45,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:45,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:31:45,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:31:45,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:31:45,944 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:31:45,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:31:45,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:31:45,944 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:31:46,227 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:31:46,240 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:31:46,244 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:31:46,245 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:31:46,246 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:31:46,247 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i [2019-10-15 01:31:46,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a763b3334/5f382824b2e04f368255a578d4cba5c8/FLAGceea9bb69 [2019-10-15 01:31:46,768 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:31:46,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i [2019-10-15 01:31:46,773 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a763b3334/5f382824b2e04f368255a578d4cba5c8/FLAGceea9bb69 [2019-10-15 01:31:47,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a763b3334/5f382824b2e04f368255a578d4cba5c8 [2019-10-15 01:31:47,173 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:31:47,175 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:31:47,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:47,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:31:47,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:31:47,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:47" (1/1) ... [2019-10-15 01:31:47,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a632ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:47, skipping insertion in model container [2019-10-15 01:31:47,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:47" (1/1) ... [2019-10-15 01:31:47,192 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:31:47,208 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:31:47,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:47,410 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:31:47,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:47,453 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:31:47,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:47 WrapperNode [2019-10-15 01:31:47,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:47,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:31:47,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:31:47,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:31:47,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:47" (1/1) ... [2019-10-15 01:31:47,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:47" (1/1) ... [2019-10-15 01:31:47,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:47" (1/1) ... [2019-10-15 01:31:47,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:47" (1/1) ... [2019-10-15 01:31:47,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:47" (1/1) ... [2019-10-15 01:31:47,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:47" (1/1) ... [2019-10-15 01:31:47,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:47" (1/1) ... [2019-10-15 01:31:47,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:31:47,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:31:47,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:31:47,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:31:47,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:47" (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 [2019-10-15 01:31:47,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:31:47,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:31:47,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:31:47,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:31:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:31:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:31:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:31:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:31:47,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:31:47,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:31:47,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:31:47,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:31:47,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:31:47,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:31:48,062 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:31:48,062 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-15 01:31:48,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:48 BoogieIcfgContainer [2019-10-15 01:31:48,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:31:48,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:31:48,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:31:48,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:31:48,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:47" (1/3) ... [2019-10-15 01:31:48,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4f376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:48, skipping insertion in model container [2019-10-15 01:31:48,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:47" (2/3) ... [2019-10-15 01:31:48,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4f376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:48, skipping insertion in model container [2019-10-15 01:31:48,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:48" (3/3) ... [2019-10-15 01:31:48,071 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2019-10-15 01:31:48,080 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:31:48,086 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:31:48,096 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:31:48,117 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:31:48,117 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:31:48,117 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:31:48,117 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:31:48,117 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:31:48,118 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:31:48,118 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:31:48,118 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:31:48,136 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-15 01:31:48,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:31:48,142 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:48,143 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:48,145 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:48,151 INFO L82 PathProgramCache]: Analyzing trace with hash -573825775, now seen corresponding path program 1 times [2019-10-15 01:31:48,158 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:48,158 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808750170] [2019-10-15 01:31:48,159 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:48,159 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:48,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:48,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808750170] [2019-10-15 01:31:48,337 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:48,338 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:48,338 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981873868] [2019-10-15 01:31:48,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:48,345 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:48,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:48,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:48,363 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-10-15 01:31:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:48,414 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2019-10-15 01:31:48,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:48,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:31:48,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:48,423 INFO L225 Difference]: With dead ends: 37 [2019-10-15 01:31:48,423 INFO L226 Difference]: Without dead ends: 19 [2019-10-15 01:31:48,427 INFO L600 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 [2019-10-15 01:31:48,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-15 01:31:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-15 01:31:48,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 01:31:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-10-15 01:31:48,459 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2019-10-15 01:31:48,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:48,460 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-10-15 01:31:48,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:48,460 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-10-15 01:31:48,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:31:48,461 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:48,461 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:48,462 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:48,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:48,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1140036509, now seen corresponding path program 1 times [2019-10-15 01:31:48,463 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:48,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657618676] [2019-10-15 01:31:48,463 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:48,463 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:48,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:48,531 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657618676] [2019-10-15 01:31:48,531 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:48,531 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:48,532 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192163668] [2019-10-15 01:31:48,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:48,533 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:48,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:48,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:48,534 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 3 states. [2019-10-15 01:31:48,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:48,548 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2019-10-15 01:31:48,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:48,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-15 01:31:48,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:48,550 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:31:48,550 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:31:48,551 INFO L600 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 [2019-10-15 01:31:48,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:31:48,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:31:48,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:31:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 01:31:48,557 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2019-10-15 01:31:48,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:48,558 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 01:31:48,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:48,558 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 01:31:48,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:31:48,559 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:48,559 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:48,559 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:48,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:48,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1123124524, now seen corresponding path program 1 times [2019-10-15 01:31:48,560 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:48,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823810477] [2019-10-15 01:31:48,561 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:48,561 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:48,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:48,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823810477] [2019-10-15 01:31:48,604 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:48,604 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:48,605 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064227764] [2019-10-15 01:31:48,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:48,605 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:48,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:48,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:48,606 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 01:31:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:48,625 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-10-15 01:31:48,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:48,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-15 01:31:48,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:48,627 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:31:48,627 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:31:48,628 INFO L600 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 [2019-10-15 01:31:48,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:31:48,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:31:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:31:48,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 01:31:48,634 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2019-10-15 01:31:48,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:48,635 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 01:31:48,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:48,635 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 01:31:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:31:48,636 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:48,636 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:48,636 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:48,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:48,637 INFO L82 PathProgramCache]: Analyzing trace with hash -685002894, now seen corresponding path program 1 times [2019-10-15 01:31:48,637 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:48,638 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304097643] [2019-10-15 01:31:48,638 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:48,638 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:48,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:48,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304097643] [2019-10-15 01:31:48,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348256454] [2019-10-15 01:31:48,722 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 [2019-10-15 01:31:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:48,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:31:48,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:48,811 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:48,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1279638731] [2019-10-15 01:31:48,886 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:31:48,887 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:48,894 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:48,902 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:48,902 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:49,112 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:49,586 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:31:49,604 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:49,613 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:50,150 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:50,150 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 13] total 19 [2019-10-15 01:31:50,151 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185408595] [2019-10-15 01:31:50,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:31:50,152 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:50,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:31:50,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:31:50,154 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 19 states. [2019-10-15 01:31:50,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:50,998 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2019-10-15 01:31:50,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 01:31:50,998 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 17 [2019-10-15 01:31:50,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:51,001 INFO L225 Difference]: With dead ends: 51 [2019-10-15 01:31:51,001 INFO L226 Difference]: Without dead ends: 37 [2019-10-15 01:31:51,002 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 01:31:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-15 01:31:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-10-15 01:31:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:31:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-15 01:31:51,014 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2019-10-15 01:31:51,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:51,014 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-15 01:31:51,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:31:51,015 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-15 01:31:51,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:31:51,015 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:51,016 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:51,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:51,223 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:51,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:51,224 INFO L82 PathProgramCache]: Analyzing trace with hash -143319426, now seen corresponding path program 2 times [2019-10-15 01:31:51,224 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:51,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229428576] [2019-10-15 01:31:51,225 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:51,225 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:51,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:51,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229428576] [2019-10-15 01:31:51,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473193610] [2019-10-15 01:31:51,287 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-10-15 01:31:51,335 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:31:51,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:51,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:31:51,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:51,353 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:51,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1049504918] [2019-10-15 01:31:51,414 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:31:51,414 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:51,415 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:51,415 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:51,416 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:51,463 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:51,872 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:31:51,884 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:51,889 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:52,436 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:52,437 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 13] total 25 [2019-10-15 01:31:52,437 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34023547] [2019-10-15 01:31:52,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:31:52,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:52,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:31:52,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:31:52,440 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 25 states. [2019-10-15 01:31:53,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:53,413 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2019-10-15 01:31:53,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 01:31:53,418 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 20 [2019-10-15 01:31:53,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:53,419 INFO L225 Difference]: With dead ends: 59 [2019-10-15 01:31:53,419 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 01:31:53,421 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2019-10-15 01:31:53,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 01:31:53,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2019-10-15 01:31:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:31:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-15 01:31:53,436 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 20 [2019-10-15 01:31:53,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:53,436 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-15 01:31:53,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:31:53,437 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-15 01:31:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 01:31:53,445 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:53,446 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:53,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:53,647 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:53,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:53,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1928611330, now seen corresponding path program 3 times [2019-10-15 01:31:53,647 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:53,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984528202] [2019-10-15 01:31:53,648 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:53,648 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:53,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:53,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984528202] [2019-10-15 01:31:53,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547394021] [2019-10-15 01:31:53,834 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:53,918 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:31:53,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:53,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:31:53,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:53,950 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:54,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1136941690] [2019-10-15 01:31:54,152 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:31:54,153 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:54,153 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:54,153 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:54,154 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:54,181 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:54,429 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:31:54,442 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:54,446 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:55,015 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:55,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13] total 37 [2019-10-15 01:31:55,015 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367897529] [2019-10-15 01:31:55,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-15 01:31:55,018 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:55,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-15 01:31:55,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=993, Unknown=0, NotChecked=0, Total=1332 [2019-10-15 01:31:55,020 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 37 states. [2019-10-15 01:31:56,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:56,487 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2019-10-15 01:31:56,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-15 01:31:56,488 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 26 [2019-10-15 01:31:56,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:56,489 INFO L225 Difference]: With dead ends: 71 [2019-10-15 01:31:56,489 INFO L226 Difference]: Without dead ends: 55 [2019-10-15 01:31:56,492 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=974, Invalid=3718, Unknown=0, NotChecked=0, Total=4692 [2019-10-15 01:31:56,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-15 01:31:56,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2019-10-15 01:31:56,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-15 01:31:56,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-10-15 01:31:56,501 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 26 [2019-10-15 01:31:56,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:56,502 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-10-15 01:31:56,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-15 01:31:56,502 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-10-15 01:31:56,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-15 01:31:56,503 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:56,503 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:56,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:56,716 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:56,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:56,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1848185086, now seen corresponding path program 4 times [2019-10-15 01:31:56,716 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:56,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953524717] [2019-10-15 01:31:56,717 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:56,717 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:56,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:57,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953524717] [2019-10-15 01:31:57,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927924751] [2019-10-15 01:31:57,074 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:57,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:31:57,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:57,186 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:57,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1066579198] [2019-10-15 01:31:57,880 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:31:57,880 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:57,880 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:57,881 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:57,881 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:57,909 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:58,087 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:31:58,097 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:58,101 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:58,672 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:58,672 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 13] total 61 [2019-10-15 01:31:58,672 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224817171] [2019-10-15 01:31:58,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-10-15 01:31:58,675 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:58,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-10-15 01:31:58,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1215, Invalid=2445, Unknown=0, NotChecked=0, Total=3660 [2019-10-15 01:31:58,677 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 61 states. [2019-10-15 01:32:01,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:01,610 INFO L93 Difference]: Finished difference Result 95 states and 128 transitions. [2019-10-15 01:32:01,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-10-15 01:32:01,611 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 38 [2019-10-15 01:32:01,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:01,613 INFO L225 Difference]: With dead ends: 95 [2019-10-15 01:32:01,614 INFO L226 Difference]: Without dead ends: 79 [2019-10-15 01:32:01,618 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3227 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3554, Invalid=10018, Unknown=0, NotChecked=0, Total=13572 [2019-10-15 01:32:01,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-15 01:32:01,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2019-10-15 01:32:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-15 01:32:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2019-10-15 01:32:01,630 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 38 [2019-10-15 01:32:01,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:01,630 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2019-10-15 01:32:01,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-10-15 01:32:01,630 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2019-10-15 01:32:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-15 01:32:01,632 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:01,632 INFO L380 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:01,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:01,836 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:01,837 INFO L82 PathProgramCache]: Analyzing trace with hash 390348542, now seen corresponding path program 5 times [2019-10-15 01:32:01,837 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:01,837 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046605924] [2019-10-15 01:32:01,837 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:01,838 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:01,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:32:02,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046605924] [2019-10-15 01:32:02,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641194650] [2019-10-15 01:32:02,911 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:03,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:32:03,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:03,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:32:03,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:32:03,053 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:32:03,096 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1256654730] [2019-10-15 01:32:03,097 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:32:03,098 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:03,098 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:03,098 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:03,098 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:03,119 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:03,297 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:32:03,305 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:03,308 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:04,007 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:04,007 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4, 13] total 65 [2019-10-15 01:32:04,008 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469479621] [2019-10-15 01:32:04,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-10-15 01:32:04,009 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:04,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-10-15 01:32:04,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=2931, Unknown=0, NotChecked=0, Total=4160 [2019-10-15 01:32:04,011 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 65 states. [2019-10-15 01:32:07,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:07,956 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2019-10-15 01:32:07,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-10-15 01:32:07,962 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 62 [2019-10-15 01:32:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:07,963 INFO L225 Difference]: With dead ends: 99 [2019-10-15 01:32:07,963 INFO L226 Difference]: Without dead ends: 83 [2019-10-15 01:32:07,968 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3699, Invalid=12051, Unknown=0, NotChecked=0, Total=15750 [2019-10-15 01:32:07,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-15 01:32:07,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2019-10-15 01:32:07,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-15 01:32:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-10-15 01:32:07,979 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 62 [2019-10-15 01:32:07,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:07,979 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-10-15 01:32:07,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-10-15 01:32:07,980 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-10-15 01:32:07,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-15 01:32:07,981 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:07,981 INFO L380 BasicCegarLoop]: trace histogram [47, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:08,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:08,185 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:08,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:08,185 INFO L82 PathProgramCache]: Analyzing trace with hash 973546540, now seen corresponding path program 6 times [2019-10-15 01:32:08,186 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:08,186 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249376740] [2019-10-15 01:32:08,186 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:08,187 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:08,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:32:09,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249376740] [2019-10-15 01:32:09,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693502978] [2019-10-15 01:32:09,442 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:09,580 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:09,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:09,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 49 conjunts are in the unsatisfiable core [2019-10-15 01:32:09,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:32:09,623 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:32:12,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [838472268] [2019-10-15 01:32:12,097 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:32:12,097 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:12,097 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:12,097 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:12,098 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:12,120 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:12,309 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:32:12,328 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:12,330 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:13,043 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:13,044 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50, 13] total 111 [2019-10-15 01:32:13,044 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074560158] [2019-10-15 01:32:13,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-10-15 01:32:13,046 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:13,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-10-15 01:32:13,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4890, Invalid=7320, Unknown=0, NotChecked=0, Total=12210 [2019-10-15 01:32:13,051 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 111 states. [2019-10-15 01:32:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:20,460 INFO L93 Difference]: Finished difference Result 151 states and 209 transitions. [2019-10-15 01:32:20,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2019-10-15 01:32:20,460 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 66 [2019-10-15 01:32:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:20,462 INFO L225 Difference]: With dead ends: 151 [2019-10-15 01:32:20,462 INFO L226 Difference]: Without dead ends: 132 [2019-10-15 01:32:20,467 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9652 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=14479, Invalid=32393, Unknown=0, NotChecked=0, Total=46872 [2019-10-15 01:32:20,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-15 01:32:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 121. [2019-10-15 01:32:20,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-15 01:32:20,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2019-10-15 01:32:20,485 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 66 [2019-10-15 01:32:20,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:20,485 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2019-10-15 01:32:20,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-10-15 01:32:20,486 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2019-10-15 01:32:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-15 01:32:20,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:20,487 INFO L380 BasicCegarLoop]: trace histogram [96, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:20,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:20,696 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:20,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:20,697 INFO L82 PathProgramCache]: Analyzing trace with hash 734515488, now seen corresponding path program 7 times [2019-10-15 01:32:20,697 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:20,698 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847818762] [2019-10-15 01:32:20,698 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:20,698 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:20,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4667 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:32:24,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847818762] [2019-10-15 01:32:24,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158886627] [2019-10-15 01:32:24,157 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:24,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 98 conjunts are in the unsatisfiable core [2019-10-15 01:32:24,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4667 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:32:24,411 INFO L321 TraceCheckSpWp]: Computing backward predicates...