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/eca-rers2012/Problem02_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:42:18,315 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:42:18,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:42:18,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:42:18,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:42:18,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:42:18,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:42:18,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:42:18,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:42:18,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:42:18,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:42:18,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:42:18,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:42:18,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:42:18,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:42:18,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:42:18,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:42:18,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:42:18,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:42:18,381 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:42:18,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:42:18,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:42:18,383 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:42:18,383 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:42:18,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:42:18,386 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:42:18,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:42:18,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:42:18,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:42:18,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:42:18,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:42:18,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:42:18,387 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:42:18,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:42:18,387 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:42:18,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:42:18,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:42:18,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:42:18,389 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:42:18,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:42:18,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:18,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:42:18,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:42:18,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:42:18,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:42:18,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:42:18,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:42:18,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:42:18,662 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:42:18,674 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:42:18,680 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:42:18,682 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:42:18,682 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:42:18,683 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label35.c [2019-10-15 01:42:18,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdc7adc9f/277ccbfd26264e5f83e375a3f471c72f/FLAGaec29feb5 [2019-10-15 01:42:19,256 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:42:19,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label35.c [2019-10-15 01:42:19,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdc7adc9f/277ccbfd26264e5f83e375a3f471c72f/FLAGaec29feb5 [2019-10-15 01:42:19,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdc7adc9f/277ccbfd26264e5f83e375a3f471c72f [2019-10-15 01:42:19,514 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:42:19,516 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:42:19,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:19,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:42:19,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:42:19,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:19" (1/1) ... [2019-10-15 01:42:19,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c8a10c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:19, skipping insertion in model container [2019-10-15 01:42:19,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:19" (1/1) ... [2019-10-15 01:42:19,532 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:42:19,591 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:42:20,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:20,123 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:42:20,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:20,231 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:42:20,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:20 WrapperNode [2019-10-15 01:42:20,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:20,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:42:20,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:42:20,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:42:20,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:20" (1/1) ... [2019-10-15 01:42:20,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:20" (1/1) ... [2019-10-15 01:42:20,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:20" (1/1) ... [2019-10-15 01:42:20,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:20" (1/1) ... [2019-10-15 01:42:20,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:20" (1/1) ... [2019-10-15 01:42:20,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:20" (1/1) ... [2019-10-15 01:42:20,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:20" (1/1) ... [2019-10-15 01:42:20,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:42:20,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:42:20,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:42:20,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:42:20,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:20,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:42:20,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:42:20,431 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:42:20,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:42:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:42:20,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:42:20,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:42:20,433 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:42:20,434 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:42:20,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:42:20,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:42:22,367 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:42:22,367 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:42:22,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:22 BoogieIcfgContainer [2019-10-15 01:42:22,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:42:22,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:42:22,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:42:22,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:42:22,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:42:19" (1/3) ... [2019-10-15 01:42:22,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d554374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:22, skipping insertion in model container [2019-10-15 01:42:22,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:20" (2/3) ... [2019-10-15 01:42:22,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d554374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:22, skipping insertion in model container [2019-10-15 01:42:22,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:22" (3/3) ... [2019-10-15 01:42:22,386 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label35.c [2019-10-15 01:42:22,399 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:42:22,409 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:42:22,419 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:42:22,450 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:42:22,450 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:42:22,452 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:42:22,452 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:42:22,452 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:42:22,453 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:42:22,453 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:42:22,453 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:42:22,487 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:42:22,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:42:22,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:22,496 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:22,498 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:22,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:22,502 INFO L82 PathProgramCache]: Analyzing trace with hash -219367113, now seen corresponding path program 1 times [2019-10-15 01:42:22,509 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:22,509 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198625813] [2019-10-15 01:42:22,509 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:22,510 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:22,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:22,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198625813] [2019-10-15 01:42:22,908 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:22,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:22,909 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399275312] [2019-10-15 01:42:22,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:22,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:22,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:22,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:22,931 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:42:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:23,451 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:42:23,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:23,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:42:23,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:23,468 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:42:23,468 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:42:23,472 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:23,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:42:23,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:42:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:42:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:42:23,535 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:42:23,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:23,536 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:42:23,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:23,536 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:42:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:42:23,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:23,542 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:23,542 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:23,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:23,543 INFO L82 PathProgramCache]: Analyzing trace with hash -701901892, now seen corresponding path program 1 times [2019-10-15 01:42:23,543 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:23,543 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621783008] [2019-10-15 01:42:23,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:23,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:23,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:23,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621783008] [2019-10-15 01:42:23,755 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:23,755 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:23,755 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756596834] [2019-10-15 01:42:23,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:23,757 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:23,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:23,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:23,758 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-15 01:42:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:24,147 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-10-15 01:42:24,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:24,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 01:42:24,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:24,153 INFO L225 Difference]: With dead ends: 513 [2019-10-15 01:42:24,153 INFO L226 Difference]: Without dead ends: 343 [2019-10-15 01:42:24,155 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:24,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-15 01:42:24,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 259. [2019-10-15 01:42:24,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-10-15 01:42:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 415 transitions. [2019-10-15 01:42:24,177 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 415 transitions. Word has length 94 [2019-10-15 01:42:24,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:24,178 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 415 transitions. [2019-10-15 01:42:24,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 415 transitions. [2019-10-15 01:42:24,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-15 01:42:24,181 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:24,181 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:24,182 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:24,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2133060150, now seen corresponding path program 1 times [2019-10-15 01:42:24,182 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:24,183 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109933756] [2019-10-15 01:42:24,183 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:24,183 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:24,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:24,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109933756] [2019-10-15 01:42:24,331 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:24,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:24,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977425500] [2019-10-15 01:42:24,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:24,334 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:24,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:24,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:24,339 INFO L87 Difference]: Start difference. First operand 259 states and 415 transitions. Second operand 3 states. [2019-10-15 01:42:24,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:24,768 INFO L93 Difference]: Finished difference Result 765 states and 1258 transitions. [2019-10-15 01:42:24,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:24,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2019-10-15 01:42:24,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:24,776 INFO L225 Difference]: With dead ends: 765 [2019-10-15 01:42:24,776 INFO L226 Difference]: Without dead ends: 511 [2019-10-15 01:42:24,779 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:24,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2019-10-15 01:42:24,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 427. [2019-10-15 01:42:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-10-15 01:42:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 687 transitions. [2019-10-15 01:42:24,814 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 687 transitions. Word has length 99 [2019-10-15 01:42:24,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:24,814 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 687 transitions. [2019-10-15 01:42:24,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 687 transitions. [2019-10-15 01:42:24,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-15 01:42:24,819 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:24,819 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:24,820 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:24,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:24,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1609786354, now seen corresponding path program 1 times [2019-10-15 01:42:24,821 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:24,821 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461492974] [2019-10-15 01:42:24,821 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:24,821 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:24,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 44 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:25,055 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461492974] [2019-10-15 01:42:25,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134532370] [2019-10-15 01:42:25,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:25,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:25,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:25,302 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:25,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1996265425] [2019-10-15 01:42:25,474 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:25,474 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:25,482 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:25,494 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:25,494 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:25,823 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2019-10-15 01:42:27,622 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 86 for LOIs [2019-10-15 01:42:32,089 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2019-10-15 01:42:32,159 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2019-10-15 01:42:32,270 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2019-10-15 01:42:32,391 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:32,407 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:32,702 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:33,010 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:33,281 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:42:33,544 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 75 [2019-10-15 01:42:33,832 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2019-10-15 01:42:34,053 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2019-10-15 01:42:34,297 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2019-10-15 01:42:34,527 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-10-15 01:42:34,895 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2019-10-15 01:42:35,817 WARN L191 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 82 [2019-10-15 01:42:38,924 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:42:38,925 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10, 5, 5] total 26 [2019-10-15 01:42:38,925 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920114021] [2019-10-15 01:42:38,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-15 01:42:38,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:38,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-15 01:42:38,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:42:38,929 INFO L87 Difference]: Start difference. First operand 427 states and 687 transitions. Second operand 13 states. [2019-10-15 01:42:39,254 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:39,607 WARN L191 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2019-10-15 01:42:40,001 WARN L191 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 99 [2019-10-15 01:42:40,425 WARN L191 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 96 [2019-10-15 01:42:40,758 WARN L191 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2019-10-15 01:42:41,111 WARN L191 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95 [2019-10-15 01:42:41,749 WARN L191 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2019-10-15 01:42:41,987 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2019-10-15 01:42:42,265 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2019-10-15 01:42:42,411 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-10-15 01:42:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:45,609 INFO L93 Difference]: Finished difference Result 1222 states and 1988 transitions. [2019-10-15 01:42:45,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:42:45,610 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 135 [2019-10-15 01:42:45,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:45,621 INFO L225 Difference]: With dead ends: 1222 [2019-10-15 01:42:45,622 INFO L226 Difference]: Without dead ends: 800 [2019-10-15 01:42:45,627 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 288 SyntacticMatches, 103 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2689 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 01:42:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2019-10-15 01:42:45,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 788. [2019-10-15 01:42:45,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2019-10-15 01:42:45,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1173 transitions. [2019-10-15 01:42:45,695 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1173 transitions. Word has length 135 [2019-10-15 01:42:45,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:45,696 INFO L462 AbstractCegarLoop]: Abstraction has 788 states and 1173 transitions. [2019-10-15 01:42:45,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-15 01:42:45,697 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1173 transitions. [2019-10-15 01:42:45,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-15 01:42:45,704 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:45,705 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:45,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:45,909 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:45,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:45,910 INFO L82 PathProgramCache]: Analyzing trace with hash 989208163, now seen corresponding path program 1 times [2019-10-15 01:42:45,911 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:45,911 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811240299] [2019-10-15 01:42:45,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:45,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:45,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 54 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:42:46,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811240299] [2019-10-15 01:42:46,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96839120] [2019-10-15 01:42:46,031 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 [2019-10-15 01:42:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:46,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:46,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:42:46,205 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:42:46,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1752792542] [2019-10-15 01:42:46,297 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:46,297 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:46,298 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:46,298 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:46,299 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:46,423 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 85 for LOIs [2019-10-15 01:42:47,388 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 84 for LOIs [2019-10-15 01:42:49,030 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-10-15 01:42:49,064 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2019-10-15 01:42:49,112 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2019-10-15 01:42:49,174 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:49,192 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:49,409 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:49,679 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:50,082 WARN L191 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 96 [2019-10-15 01:42:50,358 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:42:50,623 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2019-10-15 01:42:50,848 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2019-10-15 01:42:51,081 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2019-10-15 01:42:51,293 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2019-10-15 01:42:51,583 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2019-10-15 01:42:51,873 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 75 [2019-10-15 01:42:54,515 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:42:54,515 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8, 5, 5] total 24 [2019-10-15 01:42:54,516 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145075847] [2019-10-15 01:42:54,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-15 01:42:54,517 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:54,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-15 01:42:54,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:42:54,519 INFO L87 Difference]: Start difference. First operand 788 states and 1173 transitions. Second operand 13 states. [2019-10-15 01:42:54,823 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:55,203 WARN L191 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 95 [2019-10-15 01:42:55,665 WARN L191 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 98 [2019-10-15 01:42:56,152 WARN L191 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 95 [2019-10-15 01:42:56,474 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:42:56,815 WARN L191 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:42:57,067 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2019-10-15 01:42:57,384 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2019-10-15 01:42:57,625 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2019-10-15 01:42:57,757 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 01:42:57,897 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 91