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_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:41:53,508 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:41:53,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:41:53,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:41:53,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:41:53,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:41:53,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:41:53,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:41:53,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:41:53,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:41:53,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:41:53,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:41:53,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:41:53,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:41:53,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:41:53,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:41:53,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:41:53,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:41:53,589 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 01:41:53,619 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:41:53,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:41:53,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:41:53,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:41:53,624 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:41:53,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:41:53,625 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:41:53,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:41:53,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:41:53,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:41:53,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:41:53,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:41:53,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:41:53,629 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:41:53,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:41:53,629 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:41:53,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:41:53,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:41:53,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:41:53,630 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:41:53,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:41:53,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:41:53,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:41:53,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:41:53,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:41:53,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:41:53,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:41:53,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:41:53,633 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 01:41:53,893 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:41:53,908 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:41:53,912 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:41:53,913 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:41:53,914 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:41:53,914 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label25.c [2019-10-15 01:41:53,989 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/431da0c27/b3c46e2b29c6413aaef3d6c5bd2d8825/FLAGf713dd067 [2019-10-15 01:41:54,511 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:41:54,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label25.c [2019-10-15 01:41:54,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/431da0c27/b3c46e2b29c6413aaef3d6c5bd2d8825/FLAGf713dd067 [2019-10-15 01:41:54,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/431da0c27/b3c46e2b29c6413aaef3d6c5bd2d8825 [2019-10-15 01:41:54,759 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:41:54,762 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:41:54,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:54,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:41:54,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:41:54,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:54" (1/1) ... [2019-10-15 01:41:54,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7450f311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:54, skipping insertion in model container [2019-10-15 01:41:54,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:54" (1/1) ... [2019-10-15 01:41:54,780 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:41:54,840 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:41:55,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:55,311 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:41:55,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:55,440 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:41:55,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:55 WrapperNode [2019-10-15 01:41:55,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:55,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:41:55,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:41:55,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:41:55,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:55" (1/1) ... [2019-10-15 01:41:55,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:55" (1/1) ... [2019-10-15 01:41:55,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:55" (1/1) ... [2019-10-15 01:41:55,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:55" (1/1) ... [2019-10-15 01:41:55,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:55" (1/1) ... [2019-10-15 01:41:55,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:55" (1/1) ... [2019-10-15 01:41:55,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:55" (1/1) ... [2019-10-15 01:41:55,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:41:55,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:41:55,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:41:55,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:41:55,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:55" (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 01:41:55,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:41:55,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:41:55,625 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:41:55,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:41:55,626 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:41:55,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:41:55,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:41:55,628 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:41:55,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:41:55,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:41:55,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:41:57,591 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:41:57,592 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:41:57,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:57 BoogieIcfgContainer [2019-10-15 01:41:57,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:41:57,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:41:57,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:41:57,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:41:57,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:41:54" (1/3) ... [2019-10-15 01:41:57,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1026f0b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:57, skipping insertion in model container [2019-10-15 01:41:57,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:55" (2/3) ... [2019-10-15 01:41:57,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1026f0b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:57, skipping insertion in model container [2019-10-15 01:41:57,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:57" (3/3) ... [2019-10-15 01:41:57,615 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label25.c [2019-10-15 01:41:57,626 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:41:57,637 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:41:57,649 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:41:57,681 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:41:57,682 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:41:57,682 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:41:57,682 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:41:57,682 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:41:57,683 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:41:57,683 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:41:57,683 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:41:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:41:57,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:41:57,729 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:57,730 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 01:41:57,732 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:57,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:57,738 INFO L82 PathProgramCache]: Analyzing trace with hash -219356873, now seen corresponding path program 1 times [2019-10-15 01:41:57,748 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:57,749 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206211790] [2019-10-15 01:41:57,749 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:57,749 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:57,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:58,278 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 01:41:58,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206211790] [2019-10-15 01:41:58,280 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:58,281 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:58,281 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900712019] [2019-10-15 01:41:58,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:58,288 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:58,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:58,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:58,305 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:41:58,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:58,859 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:41:58,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:58,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:41:58,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:58,886 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:41:58,886 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:41:58,892 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 01:41:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:41:58,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:41:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:41:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-10-15 01:41:58,983 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-10-15 01:41:58,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:58,984 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-10-15 01:41:58,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-10-15 01:41:58,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-15 01:41:58,990 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:58,990 INFO L380 BasicCegarLoop]: trace histogram [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, 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 01:41:58,990 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:58,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:58,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1874052210, now seen corresponding path program 1 times [2019-10-15 01:41:58,991 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:58,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674336296] [2019-10-15 01:41:58,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:58,992 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:58,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:59,116 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674336296] [2019-10-15 01:41:59,116 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:59,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:41:59,117 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901571022] [2019-10-15 01:41:59,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:41:59,119 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:59,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:41:59,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:41:59,120 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-10-15 01:41:59,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:59,855 INFO L93 Difference]: Finished difference Result 547 states and 1064 transitions. [2019-10-15 01:41:59,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:41:59,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-10-15 01:41:59,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:59,862 INFO L225 Difference]: With dead ends: 547 [2019-10-15 01:41:59,862 INFO L226 Difference]: Without dead ends: 377 [2019-10-15 01:41:59,864 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:41:59,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-10-15 01:41:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 355. [2019-10-15 01:41:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-10-15 01:41:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 642 transitions. [2019-10-15 01:41:59,908 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 642 transitions. Word has length 101 [2019-10-15 01:41:59,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:59,908 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 642 transitions. [2019-10-15 01:41:59,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:41:59,909 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 642 transitions. [2019-10-15 01:41:59,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-15 01:41:59,913 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:59,913 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:59,914 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:59,914 INFO L82 PathProgramCache]: Analyzing trace with hash 750790249, now seen corresponding path program 1 times [2019-10-15 01:41:59,914 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:59,914 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547693565] [2019-10-15 01:41:59,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:59,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:59,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:42:00,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547693565] [2019-10-15 01:42:00,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666390399] [2019-10-15 01:42:00,046 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 01:42:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:00,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:00,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:00,241 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:00,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1979582907] [2019-10-15 01:42:00,371 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:00,374 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:00,380 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:00,388 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:00,389 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:00,744 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:03,070 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-10-15 01:42:11,661 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2019-10-15 01:42:11,730 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 10488 conjuctions. This might take some time... [2019-10-15 01:42:12,111 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 55 [2019-10-15 01:42:12,498 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 33368 conjuctions. This might take some time... [2019-10-15 01:42:13,847 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 55 [2019-10-15 01:42:14,145 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 33368 conjuctions. This might take some time... [2019-10-15 01:42:15,525 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:15,536 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:15,822 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2019-10-15 01:42:16,058 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:16,336 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:16,623 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:42:17,113 WARN L191 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 82 [2019-10-15 01:42:17,381 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:42:17,627 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2019-10-15 01:42:17,893 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2019-10-15 01:42:18,449 WARN L191 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2019-10-15 01:42:19,083 WARN L191 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 87 [2019-10-15 01:42:19,352 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2019-10-15 01:42:22,164 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:42:22,164 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 12] total 22 [2019-10-15 01:42:22,164 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397881977] [2019-10-15 01:42:22,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:42:22,166 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:22,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:42:22,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:42:22,167 INFO L87 Difference]: Start difference. First operand 355 states and 642 transitions. Second operand 22 states. [2019-10-15 01:42:22,467 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:22,827 WARN L191 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2019-10-15 01:42:23,207 WARN L191 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2019-10-15 01:42:23,624 WARN L191 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 96 [2019-10-15 01:42:23,957 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:42:24,292 WARN L191 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:42:24,503 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2019-10-15 01:42:24,740 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2019-10-15 01:42:27,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:27,499 INFO L93 Difference]: Finished difference Result 882 states and 1610 transitions. [2019-10-15 01:42:27,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 01:42:27,500 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2019-10-15 01:42:27,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:27,504 INFO L225 Difference]: With dead ends: 882 [2019-10-15 01:42:27,504 INFO L226 Difference]: Without dead ends: 532 [2019-10-15 01:42:27,506 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 241 SyntacticMatches, 80 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 01:42:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2019-10-15 01:42:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 520. [2019-10-15 01:42:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2019-10-15 01:42:27,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 788 transitions. [2019-10-15 01:42:27,539 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 788 transitions. Word has length 109 [2019-10-15 01:42:27,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:27,539 INFO L462 AbstractCegarLoop]: Abstraction has 520 states and 788 transitions. [2019-10-15 01:42:27,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:42:27,539 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 788 transitions. [2019-10-15 01:42:27,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-15 01:42:27,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:27,542 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:27,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:27,754 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:27,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:27,754 INFO L82 PathProgramCache]: Analyzing trace with hash 429774954, now seen corresponding path program 1 times [2019-10-15 01:42:27,754 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:27,754 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154282655] [2019-10-15 01:42:27,754 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:27,754 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:27,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:27,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154282655] [2019-10-15 01:42:27,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460751484] [2019-10-15 01:42:27,883 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 01:42:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:28,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:28,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:28,049 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:28,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1196212598] [2019-10-15 01:42:28,108 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:28,109 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:28,109 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:28,110 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:28,110 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:28,229 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:29,315 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 83 for LOIs [2019-10-15 01:42:30,568 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-10-15 01:42:30,611 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 54 [2019-10-15 01:42:30,807 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 54 [2019-10-15 01:42:31,015 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:31,025 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:31,252 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 75 [2019-10-15 01:42:31,487 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:31,764 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:32,141 WARN L191 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2019-10-15 01:42:32,551 WARN L191 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2019-10-15 01:42:32,792 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2019-10-15 01:42:32,997 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2019-10-15 01:42:33,213 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2019-10-15 01:42:33,416 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2019-10-15 01:42:33,659 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2019-10-15 01:42:34,256 WARN L191 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 90