/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/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/loop-crafted/simple_array_index_value_3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 03:59:36,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 03:59:36,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 03:59:36,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 03:59:36,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 03:59:36,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 03:59:36,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 03:59:36,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 03:59:36,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 03:59:36,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 03:59:36,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 03:59:36,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 03:59:36,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 03:59:36,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 03:59:36,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 03:59:36,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 03:59:36,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 03:59:36,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 03:59:36,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 03:59:36,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 03:59:36,519 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 [2019-11-07 03:59:36,540 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 03:59:36,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 03:59:36,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 03:59:36,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 03:59:36,542 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 03:59:36,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 03:59:36,543 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 03:59:36,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 03:59:36,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 03:59:36,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 03:59:36,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 03:59:36,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 03:59:36,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 03:59:36,545 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 03:59:36,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 03:59:36,545 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 03:59:36,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 03:59:36,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 03:59:36,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 03:59:36,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 03:59:36,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 03:59:36,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:59:36,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 03:59:36,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 03:59:36,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 03:59:36,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 03:59:36,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 03:59:36,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 03:59:36,548 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 [2019-11-07 03:59:36,832 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 03:59:36,854 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 03:59:36,857 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 03:59:36,858 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 03:59:36,859 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 03:59:36,859 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2019-11-07 03:59:36,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e0272883/ad753d567c85402484673b73aa20d7ce/FLAG23178e781 [2019-11-07 03:59:37,328 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 03:59:37,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2019-11-07 03:59:37,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e0272883/ad753d567c85402484673b73aa20d7ce/FLAG23178e781 [2019-11-07 03:59:37,749 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e0272883/ad753d567c85402484673b73aa20d7ce [2019-11-07 03:59:37,770 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 03:59:37,776 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 03:59:37,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 03:59:37,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 03:59:37,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 03:59:37,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:59:37" (1/1) ... [2019-11-07 03:59:37,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@200b6b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:37, skipping insertion in model container [2019-11-07 03:59:37,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:59:37" (1/1) ... [2019-11-07 03:59:37,818 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 03:59:37,859 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 03:59:38,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:59:38,113 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 03:59:38,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:59:38,148 INFO L192 MainTranslator]: Completed translation [2019-11-07 03:59:38,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:38 WrapperNode [2019-11-07 03:59:38,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 03:59:38,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 03:59:38,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 03:59:38,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 03:59:38,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:38" (1/1) ... [2019-11-07 03:59:38,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:38" (1/1) ... [2019-11-07 03:59:38,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:38" (1/1) ... [2019-11-07 03:59:38,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:38" (1/1) ... [2019-11-07 03:59:38,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:38" (1/1) ... [2019-11-07 03:59:38,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:38" (1/1) ... [2019-11-07 03:59:38,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:38" (1/1) ... [2019-11-07 03:59:38,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 03:59:38,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 03:59:38,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 03:59:38,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 03:59:38,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:38" (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 [2019-11-07 03:59:38,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 03:59:38,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 03:59:38,327 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 03:59:38,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 03:59:38,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 03:59:38,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 03:59:38,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 03:59:38,328 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 03:59:38,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 03:59:38,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 03:59:38,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 03:59:38,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 03:59:38,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 03:59:38,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 03:59:38,658 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 03:59:38,659 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-07 03:59:38,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:59:38 BoogieIcfgContainer [2019-11-07 03:59:38,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 03:59:38,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 03:59:38,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 03:59:38,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 03:59:38,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:59:37" (1/3) ... [2019-11-07 03:59:38,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db97eca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:59:38, skipping insertion in model container [2019-11-07 03:59:38,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:38" (2/3) ... [2019-11-07 03:59:38,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db97eca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:59:38, skipping insertion in model container [2019-11-07 03:59:38,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:59:38" (3/3) ... [2019-11-07 03:59:38,669 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_3.i [2019-11-07 03:59:38,681 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 03:59:38,693 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 03:59:38,705 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 03:59:38,732 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 03:59:38,733 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 03:59:38,733 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 03:59:38,733 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 03:59:38,733 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 03:59:38,733 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 03:59:38,734 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 03:59:38,734 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 03:59:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-07 03:59:38,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 03:59:38,758 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:38,759 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:38,761 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:38,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:38,765 INFO L82 PathProgramCache]: Analyzing trace with hash 793121937, now seen corresponding path program 1 times [2019-11-07 03:59:38,773 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:38,774 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658377382] [2019-11-07 03:59:38,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:38,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658377382] [2019-11-07 03:59:38,963 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:59:38,963 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:59:38,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750292314] [2019-11-07 03:59:38,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:59:38,970 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:38,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:59:38,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:59:38,990 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-11-07 03:59:39,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:59:39,054 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2019-11-07 03:59:39,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:59:39,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-07 03:59:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:59:39,068 INFO L225 Difference]: With dead ends: 34 [2019-11-07 03:59:39,068 INFO L226 Difference]: Without dead ends: 19 [2019-11-07 03:59:39,071 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 [2019-11-07 03:59:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-07 03:59:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2019-11-07 03:59:39,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-07 03:59:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-07 03:59:39,117 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2019-11-07 03:59:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:59:39,118 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-07 03:59:39,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:59:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-07 03:59:39,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 03:59:39,119 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:39,119 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:39,119 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:39,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:39,120 INFO L82 PathProgramCache]: Analyzing trace with hash 751349671, now seen corresponding path program 1 times [2019-11-07 03:59:39,120 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:39,121 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442218317] [2019-11-07 03:59:39,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:39,232 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442218317] [2019-11-07 03:59:39,232 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054309117] [2019-11-07 03:59:39,232 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 [2019-11-07 03:59:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:39,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-07 03:59:39,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:59:39,371 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-07 03:59:39,371 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:59:39,384 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:59:39,385 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 03:59:39,385 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-07 03:59:39,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:59:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:39,471 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:59:39,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:59:39,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:59:39,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:59:39,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:59:39,521 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:59:39,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:59:39,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:59:39,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:59:39,534 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:59:39,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:59:39,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:59:39,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 03:59:39,740 WARN L225 Elim1Store]: Array PQE input equivalent to true [2019-11-07 03:59:39,740 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:59:39,755 INFO L567 ElimStorePlain]: treesize reduction 6, result has 80.6 percent of original size [2019-11-07 03:59:39,762 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2019-11-07 03:59:39,775 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2019-11-07 03:59:39,778 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2019-11-07 03:59:39,784 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:59:39,784 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-11-07 03:59:39,795 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:59:39,796 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 03:59:39,797 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:63, output treesize:22 [2019-11-07 03:59:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:39,884 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [980020574] [2019-11-07 03:59:39,908 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-07 03:59:39,908 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:59:39,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:59:39,921 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:59:39,921 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:59:40,027 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 03:59:40,158 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:59:40,204 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2019-11-07 03:59:40,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:59:40,215 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:59:40,812 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:59:40,813 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8, 10] total 25 [2019-11-07 03:59:40,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726745552] [2019-11-07 03:59:40,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-07 03:59:40,816 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:40,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-07 03:59:40,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2019-11-07 03:59:40,822 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 25 states. [2019-11-07 03:59:42,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:59:42,108 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-11-07 03:59:42,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-07 03:59:42,109 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 12 [2019-11-07 03:59:42,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:59:42,110 INFO L225 Difference]: With dead ends: 38 [2019-11-07 03:59:42,110 INFO L226 Difference]: Without dead ends: 29 [2019-11-07 03:59:42,112 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2019-11-07 03:59:42,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-07 03:59:42,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2019-11-07 03:59:42,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-07 03:59:42,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-07 03:59:42,120 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2019-11-07 03:59:42,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:59:42,120 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-07 03:59:42,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-07 03:59:42,120 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-07 03:59:42,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 03:59:42,121 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:42,121 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:42,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:59:42,334 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:42,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:42,335 INFO L82 PathProgramCache]: Analyzing trace with hash -543590575, now seen corresponding path program 2 times [2019-11-07 03:59:42,335 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:42,335 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278725110] [2019-11-07 03:59:42,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:42,637 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278725110] [2019-11-07 03:59:42,637 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608137573] [2019-11-07 03:59:42,637 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 [2019-11-07 03:59:42,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 03:59:42,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 03:59:42,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 03:59:42,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:59:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:42,775 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:59:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:42,811 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1785219488] [2019-11-07 03:59:42,812 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-07 03:59:42,812 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:59:42,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:59:42,813 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:59:42,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:59:42,864 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 03:59:42,914 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:59:42,930 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2019-11-07 03:59:42,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:59:42,939 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:59:43,341 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:59:43,341 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 10] total 19 [2019-11-07 03:59:43,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159152946] [2019-11-07 03:59:43,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-07 03:59:43,343 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:43,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-07 03:59:43,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2019-11-07 03:59:43,344 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 19 states. [2019-11-07 03:59:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:59:46,352 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2019-11-07 03:59:46,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-07 03:59:46,353 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 13 [2019-11-07 03:59:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:59:46,356 INFO L225 Difference]: With dead ends: 47 [2019-11-07 03:59:46,356 INFO L226 Difference]: Without dead ends: 38 [2019-11-07 03:59:46,357 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2019-11-07 03:59:46,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-07 03:59:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 21. [2019-11-07 03:59:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-07 03:59:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-11-07 03:59:46,365 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 13 [2019-11-07 03:59:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:59:46,366 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-11-07 03:59:46,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-07 03:59:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-11-07 03:59:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-07 03:59:46,367 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:46,367 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:46,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:59:46,571 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:46,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:46,572 INFO L82 PathProgramCache]: Analyzing trace with hash -2029835055, now seen corresponding path program 3 times [2019-11-07 03:59:46,573 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:46,573 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35382293] [2019-11-07 03:59:46,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:46,729 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35382293] [2019-11-07 03:59:46,730 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428243806] [2019-11-07 03:59:46,730 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 [2019-11-07 03:59:46,779 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 03:59:46,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 03:59:46,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-07 03:59:46,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:59:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:46,813 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:59:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:46,975 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [466391624] [2019-11-07 03:59:46,976 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-07 03:59:46,976 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:59:46,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:59:46,977 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:59:46,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:59:47,021 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 03:59:47,111 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:59:47,127 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2019-11-07 03:59:47,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:59:47,138 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:59:47,546 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2019-11-07 03:59:47,647 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:59:47,647 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 10] total 27 [2019-11-07 03:59:47,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708425009] [2019-11-07 03:59:47,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-07 03:59:47,649 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:47,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-07 03:59:47,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2019-11-07 03:59:47,650 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 27 states. [2019-11-07 03:59:51,235 WARN L191 SmtUtils]: Spent 3.05 s on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2019-11-07 03:59:51,903 WARN L191 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2019-11-07 03:59:53,266 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2019-11-07 04:00:12,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:00:12,577 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2019-11-07 04:00:12,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-07 04:00:12,577 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 17 [2019-11-07 04:00:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:00:12,579 INFO L225 Difference]: With dead ends: 84 [2019-11-07 04:00:12,579 INFO L226 Difference]: Without dead ends: 75 [2019-11-07 04:00:12,581 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2019-11-07 04:00:12,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-07 04:00:12,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 29. [2019-11-07 04:00:12,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 04:00:12,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-07 04:00:12,594 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2019-11-07 04:00:12,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:00:12,594 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-07 04:00:12,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-07 04:00:12,595 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-07 04:00:12,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 04:00:12,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:00:12,595 INFO L410 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:00:12,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:00:12,799 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:00:12,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:00:12,799 INFO L82 PathProgramCache]: Analyzing trace with hash 45242321, now seen corresponding path program 4 times [2019-11-07 04:00:12,800 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:00:12,800 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587239945] [2019-11-07 04:00:12,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:00:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:00:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:00:13,195 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587239945] [2019-11-07 04:00:13,195 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658088323] [2019-11-07 04:00:13,195 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 [2019-11-07 04:00:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:00:13,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-07 04:00:13,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:00:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:00:13,307 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:00:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:00:13,860 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [789433357] [2019-11-07 04:00:13,861 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-07 04:00:13,861 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:00:13,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:00:13,862 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:00:13,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:00:13,888 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:00:13,999 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 04:00:14,018 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2019-11-07 04:00:14,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:00:14,030 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:00:14,735 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:00:14,735 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 10] total 43 [2019-11-07 04:00:14,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025337833] [2019-11-07 04:00:14,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-07 04:00:14,737 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:00:14,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-07 04:00:14,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1425, Unknown=0, NotChecked=0, Total=1806 [2019-11-07 04:00:14,738 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 43 states. [2019-11-07 04:00:19,383 WARN L191 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 77 DAG size of output: 25 [2019-11-07 04:00:22,068 WARN L191 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 73 DAG size of output: 25