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_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:42:00,593 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:42:00,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:42:00,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:42:00,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:42:00,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:42:00,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:42:00,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:42:00,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:42:00,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:42:00,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:42:00,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:42:00,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:42:00,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:42:00,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:42:00,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:42:00,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:42:00,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:42:00,683 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 01:42:00,721 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:42:00,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:42:00,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:42:00,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:42:00,723 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:42:00,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:42:00,726 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:42:00,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:42:00,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:42:00,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:42:00,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:42:00,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:42:00,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:42:00,727 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:42:00,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:42:00,728 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:42:00,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:42:00,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:42:00,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:42:00,730 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:42:00,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:42:00,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:00,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:42:00,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:42:00,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:42:00,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:42:00,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:42:00,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:42:00,732 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 01:42:00,994 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:42:01,008 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:42:01,011 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:42:01,012 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:42:01,012 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:42:01,013 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label29.c [2019-10-15 01:42:01,086 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e797b0bef/29965ce58e2a43f4a12f0c24f4d41e25/FLAG14a183882 [2019-10-15 01:42:01,624 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:42:01,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label29.c [2019-10-15 01:42:01,644 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e797b0bef/29965ce58e2a43f4a12f0c24f4d41e25/FLAG14a183882 [2019-10-15 01:42:01,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e797b0bef/29965ce58e2a43f4a12f0c24f4d41e25 [2019-10-15 01:42:01,941 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:42:01,942 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:42:01,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:01,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:42:01,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:42:01,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:01" (1/1) ... [2019-10-15 01:42:01,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@641eaed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:01, skipping insertion in model container [2019-10-15 01:42:01,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:01" (1/1) ... [2019-10-15 01:42:01,959 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:42:02,011 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:42:02,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:02,557 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:42:02,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:02,687 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:42:02,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:02 WrapperNode [2019-10-15 01:42:02,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:02,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:42:02,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:42:02,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:42:02,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:02" (1/1) ... [2019-10-15 01:42:02,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:02" (1/1) ... [2019-10-15 01:42:02,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:02" (1/1) ... [2019-10-15 01:42:02,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:02" (1/1) ... [2019-10-15 01:42:02,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:02" (1/1) ... [2019-10-15 01:42:02,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:02" (1/1) ... [2019-10-15 01:42:02,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:02" (1/1) ... [2019-10-15 01:42:02,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:42:02,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:42:02,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:42:02,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:42:02,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:02" (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 01:42:02,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:42:02,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:42:02,936 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:42:02,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:42:02,936 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:42:02,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:42:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:42:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:42:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:42:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:42:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:42:05,382 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:42:05,383 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:42:05,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:05 BoogieIcfgContainer [2019-10-15 01:42:05,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:42:05,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:42:05,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:42:05,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:42:05,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:42:01" (1/3) ... [2019-10-15 01:42:05,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a683eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:05, skipping insertion in model container [2019-10-15 01:42:05,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:02" (2/3) ... [2019-10-15 01:42:05,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a683eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:05, skipping insertion in model container [2019-10-15 01:42:05,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:05" (3/3) ... [2019-10-15 01:42:05,393 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label29.c [2019-10-15 01:42:05,404 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:42:05,412 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:42:05,424 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:42:05,451 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:42:05,451 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:42:05,451 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:42:05,451 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:42:05,451 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:42:05,451 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:42:05,452 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:42:05,452 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:42:05,473 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:42:05,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:42:05,483 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:05,484 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 01:42:05,486 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:05,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:05,492 INFO L82 PathProgramCache]: Analyzing trace with hash -219365065, now seen corresponding path program 1 times [2019-10-15 01:42:05,502 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:05,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199531519] [2019-10-15 01:42:05,503 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:05,503 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:05,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:05,955 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 01:42:05,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199531519] [2019-10-15 01:42:05,956 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:05,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:05,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13565622] [2019-10-15 01:42:05,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:05,963 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:05,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:05,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:05,981 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:42:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:06,419 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:42:06,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:06,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:42:06,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:06,440 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:42:06,440 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:42:06,447 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 01:42:06,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:42:06,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:42:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:42:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:42:06,527 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:42:06,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:06,528 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:42:06,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:06,529 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:42:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:42:06,543 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:06,544 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 01:42:06,544 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:06,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:06,546 INFO L82 PathProgramCache]: Analyzing trace with hash -701899844, now seen corresponding path program 1 times [2019-10-15 01:42:06,546 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:06,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890731694] [2019-10-15 01:42:06,547 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:06,547 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:06,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:06,784 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 01:42:06,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890731694] [2019-10-15 01:42:06,784 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:06,785 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:06,785 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382429820] [2019-10-15 01:42:06,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:06,787 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:06,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:06,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:06,788 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-15 01:42:07,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:07,215 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-10-15 01:42:07,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:07,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 01:42:07,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:07,222 INFO L225 Difference]: With dead ends: 513 [2019-10-15 01:42:07,222 INFO L226 Difference]: Without dead ends: 343 [2019-10-15 01:42:07,228 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 01:42:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-15 01:42:07,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 259. [2019-10-15 01:42:07,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-10-15 01:42:07,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 415 transitions. [2019-10-15 01:42:07,256 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 415 transitions. Word has length 94 [2019-10-15 01:42:07,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:07,257 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 415 transitions. [2019-10-15 01:42:07,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:07,257 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 415 transitions. [2019-10-15 01:42:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-15 01:42:07,262 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:07,262 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 01:42:07,262 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:07,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:07,263 INFO L82 PathProgramCache]: Analyzing trace with hash -2133058102, now seen corresponding path program 1 times [2019-10-15 01:42:07,263 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:07,263 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543975371] [2019-10-15 01:42:07,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:07,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:07,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:07,423 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 01:42:07,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543975371] [2019-10-15 01:42:07,424 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:07,424 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:07,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783501149] [2019-10-15 01:42:07,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:07,426 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:07,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:07,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:07,431 INFO L87 Difference]: Start difference. First operand 259 states and 415 transitions. Second operand 3 states. [2019-10-15 01:42:07,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:07,897 INFO L93 Difference]: Finished difference Result 765 states and 1258 transitions. [2019-10-15 01:42:07,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:07,898 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2019-10-15 01:42:07,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:07,906 INFO L225 Difference]: With dead ends: 765 [2019-10-15 01:42:07,906 INFO L226 Difference]: Without dead ends: 511 [2019-10-15 01:42:07,908 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 01:42:07,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2019-10-15 01:42:07,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 427. [2019-10-15 01:42:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-10-15 01:42:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 687 transitions. [2019-10-15 01:42:07,942 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 687 transitions. Word has length 99 [2019-10-15 01:42:07,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:07,944 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 687 transitions. [2019-10-15 01:42:07,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:07,944 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 687 transitions. [2019-10-15 01:42:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-15 01:42:07,954 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:07,955 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 01:42:07,955 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:07,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:07,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1609784306, now seen corresponding path program 1 times [2019-10-15 01:42:07,956 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:07,956 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150994750] [2019-10-15 01:42:07,956 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:07,956 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:07,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:08,174 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 01:42:08,174 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150994750] [2019-10-15 01:42:08,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434738724] [2019-10-15 01:42:08,175 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 01:42:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:08,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:08,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:08,412 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 01:42:08,412 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:08,567 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 01:42:08,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1633488656] [2019-10-15 01:42:08,597 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:08,597 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:08,604 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:08,612 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:08,613 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:08,903 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2019-10-15 01:42:09,481 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2019-10-15 01:42:10,949 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 86 for LOIs [2019-10-15 01:42:17,866 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2019-10-15 01:42:17,905 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5145 conjuctions. This might take some time... [2019-10-15 01:42:17,997 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2019-10-15 01:42:18,199 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2019-10-15 01:42:18,370 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:18,386 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:18,644 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:18,952 WARN L191 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:19,249 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:42:19,518 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 75 [2019-10-15 01:42:19,799 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2019-10-15 01:42:20,036 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2019-10-15 01:42:20,298 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2019-10-15 01:42:20,545 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-10-15 01:42:20,932 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2019-10-15 01:42:21,932 WARN L191 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 82 [2019-10-15 01:42:24,992 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:42:24,993 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10, 5, 5] total 26 [2019-10-15 01:42:24,993 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948597988] [2019-10-15 01:42:24,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-15 01:42:24,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:24,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-15 01:42:24,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:42:24,996 INFO L87 Difference]: Start difference. First operand 427 states and 687 transitions. Second operand 13 states. [2019-10-15 01:42:25,291 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:25,657 WARN L191 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2019-10-15 01:42:26,038 WARN L191 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 99 [2019-10-15 01:42:26,470 WARN L191 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 96 [2019-10-15 01:42:26,807 WARN L191 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2019-10-15 01:42:27,163 WARN L191 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95 [2019-10-15 01:42:27,812 WARN L191 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2019-10-15 01:42:28,074 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2019-10-15 01:42:28,281 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2019-10-15 01:42:28,436 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-10-15 01:42:31,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:31,710 INFO L93 Difference]: Finished difference Result 1222 states and 1988 transitions. [2019-10-15 01:42:31,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:42:31,711 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 135 [2019-10-15 01:42:31,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:31,718 INFO L225 Difference]: With dead ends: 1222 [2019-10-15 01:42:31,718 INFO L226 Difference]: Without dead ends: 800 [2019-10-15 01:42:31,721 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 288 SyntacticMatches, 103 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2689 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 01:42:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2019-10-15 01:42:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 788. [2019-10-15 01:42:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2019-10-15 01:42:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1173 transitions. [2019-10-15 01:42:31,778 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1173 transitions. Word has length 135 [2019-10-15 01:42:31,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:31,779 INFO L462 AbstractCegarLoop]: Abstraction has 788 states and 1173 transitions. [2019-10-15 01:42:31,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-15 01:42:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1173 transitions. [2019-10-15 01:42:31,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-15 01:42:31,783 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:31,783 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 01:42:31,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:31,994 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:31,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:31,995 INFO L82 PathProgramCache]: Analyzing trace with hash 989210211, now seen corresponding path program 1 times [2019-10-15 01:42:31,995 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:31,995 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029673602] [2019-10-15 01:42:31,995 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:31,995 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:31,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:32,172 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 01:42:32,172 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029673602] [2019-10-15 01:42:32,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303123369] [2019-10-15 01:42:32,173 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 01:42:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:32,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:32,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:32,379 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 01:42:32,380 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:32,451 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 01:42:32,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406808071] [2019-10-15 01:42:32,458 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:32,459 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:32,460 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:32,461 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:32,461 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:32,616 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 85 for LOIs [2019-10-15 01:42:33,793 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 84 for LOIs [2019-10-15 01:42:35,486 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2019-10-15 01:42:35,535 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-10-15 01:42:35,644 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-10-15 01:42:35,729 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:35,744 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:35,977 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:36,269 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:36,717 WARN L191 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 96