/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/array-tiling/pr3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:32:25,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:32:25,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:32:25,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:32:25,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:32:25,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:32:25,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:32:25,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:32:25,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:32:25,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:32:25,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:32:25,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:32:25,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:32:25,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:32:25,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:32:25,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:32:25,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:32:25,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:32:25,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:32:25,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:32:25,434 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 01:32:25,449 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:32:25,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:32:25,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:32:25,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:32:25,451 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:32:25,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:32:25,451 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:32:25,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:32:25,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:32:25,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:32:25,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:32:25,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:32:25,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:32:25,453 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:32:25,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:32:25,453 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:32:25,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:32:25,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:32:25,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:32:25,454 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:32:25,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:32:25,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:32:25,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:32:25,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:32:25,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:32:25,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:32:25,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:32:25,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:32:25,456 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 01:32:25,754 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:32:25,765 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:32:25,769 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:32:25,770 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:32:25,771 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:32:25,771 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pr3.c [2019-11-07 01:32:25,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1e89faa/fd9dfb3e5bd04a4e86f1a6baa5046203/FLAGebaeb28df [2019-11-07 01:32:26,288 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:32:26,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr3.c [2019-11-07 01:32:26,297 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1e89faa/fd9dfb3e5bd04a4e86f1a6baa5046203/FLAGebaeb28df [2019-11-07 01:32:26,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1e89faa/fd9dfb3e5bd04a4e86f1a6baa5046203 [2019-11-07 01:32:26,697 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:32:26,699 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:32:26,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:32:26,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:32:26,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:32:26,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:26" (1/1) ... [2019-11-07 01:32:26,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@630fa84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:26, skipping insertion in model container [2019-11-07 01:32:26,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:26" (1/1) ... [2019-11-07 01:32:26,729 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:32:26,765 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:32:27,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:32:27,006 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:32:27,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:32:27,145 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:32:27,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:27 WrapperNode [2019-11-07 01:32:27,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:32:27,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:32:27,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:32:27,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:32:27,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:27" (1/1) ... [2019-11-07 01:32:27,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:27" (1/1) ... [2019-11-07 01:32:27,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:27" (1/1) ... [2019-11-07 01:32:27,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:27" (1/1) ... [2019-11-07 01:32:27,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:27" (1/1) ... [2019-11-07 01:32:27,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:27" (1/1) ... [2019-11-07 01:32:27,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:27" (1/1) ... [2019-11-07 01:32:27,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:32:27,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:32:27,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:32:27,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:32:27,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:27" (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 01:32:27,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:32:27,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:32:27,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:32:27,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:32:27,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:32:27,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 01:32:27,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:32:27,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:32:27,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:32:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:32:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:32:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:32:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:32:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:32:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:32:27,726 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:32:27,726 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-07 01:32:27,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:27 BoogieIcfgContainer [2019-11-07 01:32:27,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:32:27,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:32:27,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:32:27,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:32:27,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:32:26" (1/3) ... [2019-11-07 01:32:27,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66be650f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:27, skipping insertion in model container [2019-11-07 01:32:27,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:27" (2/3) ... [2019-11-07 01:32:27,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66be650f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:27, skipping insertion in model container [2019-11-07 01:32:27,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:27" (3/3) ... [2019-11-07 01:32:27,741 INFO L109 eAbstractionObserver]: Analyzing ICFG pr3.c [2019-11-07 01:32:27,751 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:32:27,760 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:32:27,772 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:32:27,799 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:32:27,799 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:32:27,799 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:32:27,799 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:32:27,800 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:32:27,800 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:32:27,800 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:32:27,800 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:32:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-07 01:32:27,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:32:27,820 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:27,821 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:32:27,822 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:27,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:27,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1379838131, now seen corresponding path program 1 times [2019-11-07 01:32:27,836 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:27,836 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30398156] [2019-11-07 01:32:27,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:28,148 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 01:32:28,149 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30398156] [2019-11-07 01:32:28,150 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:32:28,150 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:32:28,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106602987] [2019-11-07 01:32:28,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:32:28,157 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:32:28,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:32:28,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:32:28,175 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-11-07 01:32:28,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:32:28,263 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2019-11-07 01:32:28,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:32:28,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-07 01:32:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:32:28,274 INFO L225 Difference]: With dead ends: 42 [2019-11-07 01:32:28,274 INFO L226 Difference]: Without dead ends: 18 [2019-11-07 01:32:28,278 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:32:28,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-07 01:32:28,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-07 01:32:28,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 01:32:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-07 01:32:28,315 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-11-07 01:32:28,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:32:28,316 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-07 01:32:28,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:32:28,316 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-07 01:32:28,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:32:28,317 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:28,317 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:32:28,318 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:28,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:28,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1391156721, now seen corresponding path program 1 times [2019-11-07 01:32:28,319 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:28,319 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062782659] [2019-11-07 01:32:28,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:28,798 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 01:32:28,799 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062782659] [2019-11-07 01:32:28,799 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353517105] [2019-11-07 01:32:28,799 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 01:32:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:28,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-07 01:32:28,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:32:28,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:28,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:28,979 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:29,047 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:29,048 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:29,381 WARN L191 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2019-11-07 01:32:29,382 INFO L567 ElimStorePlain]: treesize reduction 123, result has 51.2 percent of original size [2019-11-07 01:32:29,392 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,394 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,396 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,398 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,400 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,428 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 35 [2019-11-07 01:32:29,429 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:29,533 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2019-11-07 01:32:29,533 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:29,534 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_47| vanished before elimination [2019-11-07 01:32:29,544 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,546 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,549 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,550 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,552 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,554 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,571 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 38 [2019-11-07 01:32:29,572 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:29,679 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2019-11-07 01:32:29,680 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:29,680 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-11-07 01:32:29,680 INFO L464 ElimStorePlain]: Eliminatee v_prenex_5 vanished before elimination [2019-11-07 01:32:29,689 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,692 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,694 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,707 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 32 [2019-11-07 01:32:29,709 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:29,800 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:29,811 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,813 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,816 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,817 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:29,827 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 39 [2019-11-07 01:32:29,828 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:29,902 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:29,904 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-2 vars, End of recursive call: and 4 xjuncts. [2019-11-07 01:32:29,908 INFO L221 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:289, output treesize:143 [2019-11-07 01:32:30,094 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-07 01:32:30,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,107 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,108 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,116 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,122 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,129 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,131 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,197 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 01:32:30,197 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:32:30,210 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,215 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,274 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,279 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,285 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,297 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,362 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 75 treesize of output 71 [2019-11-07 01:32:30,372 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 01:32:30,375 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 01:32:30,388 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 01:32:30,388 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 01:32:30,405 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 53 treesize of output 49 [2019-11-07 01:32:30,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,408 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:30,423 INFO L567 ElimStorePlain]: treesize reduction 12, result has 61.3 percent of original size [2019-11-07 01:32:30,424 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-07 01:32:30,649 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 105 [2019-11-07 01:32:30,650 INFO L567 ElimStorePlain]: treesize reduction 43, result has 93.4 percent of original size [2019-11-07 01:32:30,659 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 75 treesize of output 71 [2019-11-07 01:32:30,664 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 01:32:30,665 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 01:32:30,673 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 01:32:30,674 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 01:32:30,679 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 53 treesize of output 49 [2019-11-07 01:32:30,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,681 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:30,698 INFO L567 ElimStorePlain]: treesize reduction 12, result has 61.3 percent of original size [2019-11-07 01:32:30,698 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-07 01:32:30,914 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2019-11-07 01:32:30,915 INFO L567 ElimStorePlain]: treesize reduction 5, result has 99.1 percent of original size [2019-11-07 01:32:30,936 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 103 treesize of output 97 [2019-11-07 01:32:30,944 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 01:32:30,947 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 01:32:30,960 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 01:32:30,961 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 01:32:30,966 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 84 treesize of output 78 [2019-11-07 01:32:30,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,969 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:30,972 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:30,989 INFO L567 ElimStorePlain]: treesize reduction 26, result has 35.0 percent of original size [2019-11-07 01:32:30,990 INFO L496 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-07 01:32:31,151 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2019-11-07 01:32:31,152 INFO L567 ElimStorePlain]: treesize reduction 57, result has 87.7 percent of original size [2019-11-07 01:32:31,159 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 98 treesize of output 92 [2019-11-07 01:32:31,164 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 01:32:31,167 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 01:32:31,172 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 01:32:31,173 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 01:32:31,179 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 84 treesize of output 78 [2019-11-07 01:32:31,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:31,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:31,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:31,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:31,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:31,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:31,185 INFO L496 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:31,204 INFO L567 ElimStorePlain]: treesize reduction 27, result has 22.9 percent of original size [2019-11-07 01:32:31,204 INFO L496 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-07 01:32:31,224 INFO L567 ElimStorePlain]: treesize reduction 308, result has 2.5 percent of original size [2019-11-07 01:32:31,224 INFO L464 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2019-11-07 01:32:31,224 INFO L464 ElimStorePlain]: Eliminatee v_prenex_17 vanished before elimination [2019-11-07 01:32:31,224 INFO L464 ElimStorePlain]: Eliminatee |#memory_int| vanished before elimination [2019-11-07 01:32:31,225 INFO L464 ElimStorePlain]: Eliminatee v_prenex_15 vanished before elimination [2019-11-07 01:32:31,225 INFO L496 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 01:32:31,225 INFO L221 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:712, output treesize:8 [2019-11-07 01:32:31,250 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 01:32:31,250 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2033310318] [2019-11-07 01:32:31,274 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:32:31,275 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:32:31,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:32:31,288 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:32:31,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:32:31,384 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-11-07 01:32:31,683 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:31,697 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:31,711 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:31,824 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-07 01:32:31,848 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:31,865 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:31,882 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:32,003 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2019-11-07 01:32:32,052 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:32,246 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:32,365 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:32,525 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:32,650 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:32,660 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:32,670 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:32,729 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:32,739 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:32,750 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:32,805 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:32:32,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-11-07 01:32:32,820 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:32:33,680 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2019-11-07 01:32:33,794 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:32:33,794 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 12] total 30 [2019-11-07 01:32:33,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898437832] [2019-11-07 01:32:33,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-07 01:32:33,799 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:32:33,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-07 01:32:33,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2019-11-07 01:32:33,802 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 30 states. [2019-11-07 01:32:34,073 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2019-11-07 01:32:34,401 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2019-11-07 01:32:34,776 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2019-11-07 01:32:35,046 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2019-11-07 01:32:35,530 WARN L191 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2019-11-07 01:32:36,007 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2019-11-07 01:32:36,297 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2019-11-07 01:32:36,651 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2019-11-07 01:32:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:32:36,827 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-11-07 01:32:36,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-07 01:32:36,829 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 14 [2019-11-07 01:32:36,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:32:36,831 INFO L225 Difference]: With dead ends: 34 [2019-11-07 01:32:36,831 INFO L226 Difference]: Without dead ends: 32 [2019-11-07 01:32:36,833 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=216, Invalid=1506, Unknown=0, NotChecked=0, Total=1722 [2019-11-07 01:32:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-07 01:32:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-11-07 01:32:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-07 01:32:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-11-07 01:32:36,863 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 14 [2019-11-07 01:32:36,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:32:36,866 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-11-07 01:32:36,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-07 01:32:36,866 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-11-07 01:32:36,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-07 01:32:36,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:36,870 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:32:37,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:32:37,071 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:37,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:37,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1243584095, now seen corresponding path program 1 times [2019-11-07 01:32:37,072 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:37,072 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203711134] [2019-11-07 01:32:37,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 01:32:37,438 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203711134] [2019-11-07 01:32:37,438 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376494787] [2019-11-07 01:32:37,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:32:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:37,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-07 01:32:37,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:32:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 01:32:37,706 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:32:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 01:32:37,823 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [165793299] [2019-11-07 01:32:37,825 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-07 01:32:37,825 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:32:37,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:32:37,826 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:32:37,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:32:37,851 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-11-07 01:32:38,000 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:38,016 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:38,031 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:38,184 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:38,316 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:38,406 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:38,417 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:38,426 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:38,491 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:38,509 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:38,522 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:38,585 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:38,698 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:38,799 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:38,808 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:38,815 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:38,962 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2019-11-07 01:32:38,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-11-07 01:32:38,968 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:32:39,690 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2019-11-07 01:32:39,939 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:32:39,939 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8, 13] total 35 [2019-11-07 01:32:39,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778248773] [2019-11-07 01:32:39,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:32:39,941 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:32:39,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:32:39,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:32:39,943 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 35 states. [2019-11-07 01:32:40,272 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2019-11-07 01:32:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:32:42,729 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2019-11-07 01:32:42,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-07 01:32:42,730 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2019-11-07 01:32:42,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:32:42,734 INFO L225 Difference]: With dead ends: 54 [2019-11-07 01:32:42,734 INFO L226 Difference]: Without dead ends: 31 [2019-11-07 01:32:42,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=454, Invalid=2852, Unknown=0, NotChecked=0, Total=3306 [2019-11-07 01:32:42,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-07 01:32:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-07 01:32:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-07 01:32:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-11-07 01:32:42,746 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 35 [2019-11-07 01:32:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:32:42,747 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-11-07 01:32:42,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:32:42,747 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-11-07 01:32:42,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-07 01:32:42,748 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:42,748 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:32:42,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:32:42,952 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:42,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:42,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1261021469, now seen corresponding path program 2 times [2019-11-07 01:32:42,953 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:42,953 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633755598] [2019-11-07 01:32:42,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:43,425 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 01:32:43,426 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633755598] [2019-11-07 01:32:43,426 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820439857] [2019-11-07 01:32:43,426 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 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 01:32:43,516 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-07 01:32:43,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:32:43,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-07 01:32:43,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:32:43,641 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:43,945 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2019-11-07 01:32:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 01:32:45,343 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:32:45,919 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 106 [2019-11-07 01:32:46,191 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2019-11-07 01:32:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 01:32:46,336 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [207590687] [2019-11-07 01:32:46,337 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-07 01:32:46,337 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:32:46,338 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:32:46,338 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:32:46,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:32:46,363 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-11-07 01:32:46,511 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:46,527 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:46,548 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:46,691 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:46,863 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:47,046 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:47,132 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:47,143 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:47,152 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:47,199 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:47,211 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:47,221 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:47,292 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:47,351 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:47,361 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:47,370 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:47,552 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2019-11-07 01:32:47,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-11-07 01:32:47,559 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:32:48,477 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2019-11-07 01:32:48,749 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:32:48,749 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12, 13] total 44 [2019-11-07 01:32:48,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422749223] [2019-11-07 01:32:48,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-07 01:32:48,751 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:32:48,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-07 01:32:48,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1728, Unknown=0, NotChecked=0, Total=1892 [2019-11-07 01:32:48,752 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 44 states. [2019-11-07 01:32:49,026 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2019-11-07 01:32:49,532 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2019-11-07 01:32:49,915 WARN L191 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2019-11-07 01:32:50,167 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2019-11-07 01:32:50,655 WARN L191 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2019-11-07 01:32:51,199 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2019-11-07 01:32:51,664 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2019-11-07 01:32:52,061 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2019-11-07 01:32:52,495 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2019-11-07 01:32:52,775 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2019-11-07 01:32:53,086 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2019-11-07 01:32:53,368 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-11-07 01:32:53,672 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2019-11-07 01:32:53,943 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-11-07 01:32:54,478 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2019-11-07 01:32:54,808 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2019-11-07 01:32:55,253 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2019-11-07 01:32:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:32:55,258 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2019-11-07 01:32:55,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-07 01:32:55,259 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 36 [2019-11-07 01:32:55,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:32:55,262 INFO L225 Difference]: With dead ends: 50 [2019-11-07 01:32:55,262 INFO L226 Difference]: Without dead ends: 48 [2019-11-07 01:32:55,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=504, Invalid=4052, Unknown=0, NotChecked=0, Total=4556 [2019-11-07 01:32:55,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-07 01:32:55,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2019-11-07 01:32:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-07 01:32:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-11-07 01:32:55,279 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2019-11-07 01:32:55,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:32:55,280 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-11-07 01:32:55,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-07 01:32:55,280 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-11-07 01:32:55,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-07 01:32:55,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:55,282 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:32:55,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:32:55,487 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:55,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:55,488 INFO L82 PathProgramCache]: Analyzing trace with hash 783663437, now seen corresponding path program 3 times [2019-11-07 01:32:55,488 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:55,488 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078729738] [2019-11-07 01:32:55,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 53 proven. 19 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-07 01:32:56,048 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078729738] [2019-11-07 01:32:56,048 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728399930] [2019-11-07 01:32:56,048 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 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 01:32:56,131 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:32:56,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:32:56,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-07 01:32:56,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:32:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 69 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-07 01:32:56,444 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:32:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 69 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-07 01:32:56,669 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1547248017] [2019-11-07 01:32:56,671 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-07 01:32:56,672 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:32:56,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:32:56,673 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:32:56,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:32:56,705 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-11-07 01:32:56,923 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:57,087 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:57,098 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:57,112 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:57,169 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:57,181 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:57,195 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:57,323 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:57,376 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:57,385 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:57,395 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:57,429 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:57,438 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:57,446 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:57,502 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:57,562 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:57,766 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2019-11-07 01:32:57,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-11-07 01:32:57,773 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:32:58,642 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2019-11-07 01:32:58,894 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:32:58,894 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12, 13] total 47 [2019-11-07 01:32:58,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134712872] [2019-11-07 01:32:58,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-07 01:32:58,896 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:32:58,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-07 01:32:58,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1843, Unknown=0, NotChecked=0, Total=2162 [2019-11-07 01:32:58,897 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 47 states. [2019-11-07 01:32:59,238 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2019-11-07 01:33:03,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:33:03,087 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2019-11-07 01:33:03,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-07 01:33:03,088 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 57 [2019-11-07 01:33:03,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:33:03,090 INFO L225 Difference]: With dead ends: 79 [2019-11-07 01:33:03,090 INFO L226 Difference]: Without dead ends: 43 [2019-11-07 01:33:03,093 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1883 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=890, Invalid=5272, Unknown=0, NotChecked=0, Total=6162 [2019-11-07 01:33:03,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-07 01:33:03,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-07 01:33:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-07 01:33:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2019-11-07 01:33:03,105 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 57 [2019-11-07 01:33:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:33:03,105 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2019-11-07 01:33:03,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-07 01:33:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2019-11-07 01:33:03,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-07 01:33:03,108 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:33:03,108 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:33:03,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:33:03,313 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:33:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:33:03,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1670738191, now seen corresponding path program 4 times [2019-11-07 01:33:03,314 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:33:03,314 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818136690] [2019-11-07 01:33:03,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:33:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-07 01:33:03,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818136690] [2019-11-07 01:33:03,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061115049] [2019-11-07 01:33:03,838 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 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 [2019-11-07 01:33:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:03,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-07 01:33:03,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:33:04,567 WARN L191 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2019-11-07 01:33:04,727 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2019-11-07 01:33:04,883 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2019-11-07 01:33:05,021 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 51