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_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:41:05,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:41:05,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:41:05,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:41:05,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:41:05,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:41:05,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:41:05,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:41:05,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:41:05,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:41:05,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:41:05,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:41:05,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:41:05,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:41:05,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:41:05,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:41:05,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:41:05,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:41:05,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:41:05,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:41:05,323 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 01:41:05,343 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:41:05,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:41:05,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:41:05,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:41:05,345 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:41:05,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:41:05,346 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:41:05,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:41:05,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:41:05,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:41:05,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:41:05,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:41:05,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:41:05,347 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:41:05,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:41:05,348 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:41:05,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:41:05,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:41:05,348 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:41:05,349 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:41:05,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:41:05,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:41:05,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:41:05,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:41:05,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:41:05,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:41:05,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:41:05,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:41:05,351 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 01:41:05,691 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:41:05,713 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:41:05,716 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:41:05,718 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:41:05,718 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:41:05,719 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label02.c [2019-10-15 01:41:05,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83b640b62/c9d719d3a653488790c1bc30f9e1008c/FLAG65429c740 [2019-10-15 01:41:06,401 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:41:06,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label02.c [2019-10-15 01:41:06,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83b640b62/c9d719d3a653488790c1bc30f9e1008c/FLAG65429c740 [2019-10-15 01:41:06,662 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83b640b62/c9d719d3a653488790c1bc30f9e1008c [2019-10-15 01:41:06,674 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:41:06,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:41:06,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:06,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:41:06,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:41:06,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:06" (1/1) ... [2019-10-15 01:41:06,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77e35f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06, skipping insertion in model container [2019-10-15 01:41:06,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:06" (1/1) ... [2019-10-15 01:41:06,695 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:41:06,761 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:41:07,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:07,298 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:41:07,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:07,468 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:41:07,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:07 WrapperNode [2019-10-15 01:41:07,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:07,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:41:07,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:41:07,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:41:07,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:07" (1/1) ... [2019-10-15 01:41:07,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:07" (1/1) ... [2019-10-15 01:41:07,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:07" (1/1) ... [2019-10-15 01:41:07,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:07" (1/1) ... [2019-10-15 01:41:07,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:07" (1/1) ... [2019-10-15 01:41:07,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:07" (1/1) ... [2019-10-15 01:41:07,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:07" (1/1) ... [2019-10-15 01:41:07,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:41:07,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:41:07,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:41:07,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:41:07,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:07" (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 01:41:07,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:41:07,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:41:07,646 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:41:07,646 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:41:07,646 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:41:07,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:41:07,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:41:07,646 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:41:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:41:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:41:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:41:09,756 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:41:09,757 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:41:09,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:09 BoogieIcfgContainer [2019-10-15 01:41:09,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:41:09,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:41:09,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:41:09,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:41:09,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:41:06" (1/3) ... [2019-10-15 01:41:09,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de73620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:09, skipping insertion in model container [2019-10-15 01:41:09,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:07" (2/3) ... [2019-10-15 01:41:09,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de73620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:09, skipping insertion in model container [2019-10-15 01:41:09,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:09" (3/3) ... [2019-10-15 01:41:09,767 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label02.c [2019-10-15 01:41:09,778 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:41:09,787 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:41:09,799 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:41:09,827 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:41:09,827 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:41:09,827 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:41:09,827 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:41:09,828 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:41:09,828 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:41:09,828 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:41:09,828 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:41:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:41:09,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:41:09,863 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:09,864 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 01:41:09,867 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:09,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:09,873 INFO L82 PathProgramCache]: Analyzing trace with hash -219367369, now seen corresponding path program 1 times [2019-10-15 01:41:09,883 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:09,884 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835041995] [2019-10-15 01:41:09,884 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:09,884 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:09,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:10,419 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 01:41:10,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835041995] [2019-10-15 01:41:10,422 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:10,423 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:41:10,423 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767913122] [2019-10-15 01:41:10,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:41:10,432 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:10,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:41:10,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:41:10,455 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 4 states. [2019-10-15 01:41:11,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:11,312 INFO L93 Difference]: Finished difference Result 361 states and 678 transitions. [2019-10-15 01:41:11,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:41:11,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2019-10-15 01:41:11,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:11,331 INFO L225 Difference]: With dead ends: 361 [2019-10-15 01:41:11,331 INFO L226 Difference]: Without dead ends: 259 [2019-10-15 01:41:11,336 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:41:11,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-10-15 01:41:11,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 175. [2019-10-15 01:41:11,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:41:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:41:11,405 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:41:11,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:11,406 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:41:11,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:41:11,406 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:41:11,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:41:11,412 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:11,412 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 01:41:11,412 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:11,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:11,413 INFO L82 PathProgramCache]: Analyzing trace with hash -701902148, now seen corresponding path program 1 times [2019-10-15 01:41:11,414 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:11,414 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398603402] [2019-10-15 01:41:11,414 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:11,414 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:11,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:11,571 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 01:41:11,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398603402] [2019-10-15 01:41:11,573 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:11,573 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:11,573 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181840051] [2019-10-15 01:41:11,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:11,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:11,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:11,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:11,576 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-15 01:41:11,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:11,954 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-10-15 01:41:11,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:11,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 01:41:11,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:11,959 INFO L225 Difference]: With dead ends: 513 [2019-10-15 01:41:11,959 INFO L226 Difference]: Without dead ends: 343 [2019-10-15 01:41:11,962 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 01:41:11,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-15 01:41:11,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-10-15 01:41:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-10-15 01:41:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 580 transitions. [2019-10-15 01:41:11,995 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 580 transitions. Word has length 94 [2019-10-15 01:41:11,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:11,996 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 580 transitions. [2019-10-15 01:41:11,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:11,996 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 580 transitions. [2019-10-15 01:41:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 01:41:12,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:12,005 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:12,006 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:12,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:12,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1843554836, now seen corresponding path program 1 times [2019-10-15 01:41:12,007 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:12,007 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086666870] [2019-10-15 01:41:12,008 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:12,008 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:12,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:41:12,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086666870] [2019-10-15 01:41:12,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468362825] [2019-10-15 01:41:12,186 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 01:41:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:12,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:12,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:12,373 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:12,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405159753] [2019-10-15 01:41:12,498 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:12,498 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:12,506 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:12,516 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:12,517 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:12,897 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:41:15,043 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 88 for LOIs [2019-10-15 01:41:24,654 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-10-15 01:41:24,728 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 10520 conjuctions. This might take some time... [2019-10-15 01:41:25,331 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2019-10-15 01:41:25,380 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 9256 conjuctions. This might take some time... [2019-10-15 01:41:25,950 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2019-10-15 01:41:26,009 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 9256 conjuctions. This might take some time... [2019-10-15 01:41:26,654 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:41:26,672 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:41:26,901 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:41:27,168 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:41:27,641 WARN L191 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 95 [2019-10-15 01:41:27,979 WARN L191 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 82 [2019-10-15 01:41:28,264 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2019-10-15 01:41:28,524 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2019-10-15 01:41:28,795 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2019-10-15 01:41:29,328 WARN L191 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2019-10-15 01:41:29,680 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 81 [2019-10-15 01:41:29,955 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2019-10-15 01:41:33,878 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:41:33,879 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 21 [2019-10-15 01:41:33,879 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402179363] [2019-10-15 01:41:33,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-15 01:41:33,881 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:33,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-15 01:41:33,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:41:33,881 INFO L87 Difference]: Start difference. First operand 343 states and 580 transitions. Second operand 13 states. [2019-10-15 01:41:34,185 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:41:34,497 WARN L191 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 87 [2019-10-15 01:41:34,935 WARN L191 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 93 [2019-10-15 01:41:35,400 WARN L191 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 90 [2019-10-15 01:41:35,734 WARN L191 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2019-10-15 01:41:36,066 WARN L191 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95 [2019-10-15 01:41:38,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:38,663 INFO L93 Difference]: Finished difference Result 863 states and 1471 transitions. [2019-10-15 01:41:38,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:41:38,663 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2019-10-15 01:41:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:38,667 INFO L225 Difference]: With dead ends: 863 [2019-10-15 01:41:38,667 INFO L226 Difference]: Without dead ends: 525 [2019-10-15 01:41:38,670 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 264 SyntacticMatches, 94 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:41:38,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2019-10-15 01:41:38,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 522. [2019-10-15 01:41:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2019-10-15 01:41:38,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 775 transitions. [2019-10-15 01:41:38,717 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 775 transitions. Word has length 123 [2019-10-15 01:41:38,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:38,717 INFO L462 AbstractCegarLoop]: Abstraction has 522 states and 775 transitions. [2019-10-15 01:41:38,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-15 01:41:38,717 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 775 transitions. [2019-10-15 01:41:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 01:41:38,721 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:38,721 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:38,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:41:38,931 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:38,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:38,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1579167681, now seen corresponding path program 1 times [2019-10-15 01:41:38,931 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:38,931 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113094891] [2019-10-15 01:41:38,932 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:38,932 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:38,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 42 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:41:39,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113094891] [2019-10-15 01:41:39,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787370105] [2019-10-15 01:41:39,088 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 01:41:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:39,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:39,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:41:39,249 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:41:39,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [561988067] [2019-10-15 01:41:39,319 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:39,320 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:39,320 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:39,321 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:39,321 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:39,439 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:41:40,504 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 85 for LOIs [2019-10-15 01:41:42,082 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-10-15 01:41:42,137 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-10-15 01:41:42,200 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-10-15 01:41:42,266 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:41:42,276 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:41:42,501 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:41:42,794 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:41:43,288 WARN L191 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 97 [2019-10-15 01:41:43,594 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 74 [2019-10-15 01:41:43,869 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70