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_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:41:59,823 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:41:59,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:41:59,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:41:59,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:41:59,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:41:59,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:41:59,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:41:59,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:41:59,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:41:59,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:41:59,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:41:59,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:41:59,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:41:59,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:41:59,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:41:59,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:41:59,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:41:59,908 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 01:41:59,934 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:41:59,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:41:59,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:41:59,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:41:59,936 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:41:59,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:41:59,936 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:41:59,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:41:59,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:41:59,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:41:59,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:41:59,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:41:59,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:41:59,938 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:41:59,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:41:59,938 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:41:59,938 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:41:59,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:41:59,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:41:59,939 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:41:59,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:41:59,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:41:59,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:41:59,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:41:59,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:41:59,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:41:59,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:41:59,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:41:59,940 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 01:42:00,232 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:42:00,255 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:42:00,258 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:42:00,260 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:42:00,260 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:42:00,261 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label28.c [2019-10-15 01:42:00,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91e05eac1/1547648e01f148b1bfbef589be5547e1/FLAG6bbe103cc [2019-10-15 01:42:00,869 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:42:00,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label28.c [2019-10-15 01:42:00,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91e05eac1/1547648e01f148b1bfbef589be5547e1/FLAG6bbe103cc [2019-10-15 01:42:01,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91e05eac1/1547648e01f148b1bfbef589be5547e1 [2019-10-15 01:42:01,174 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:42:01,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:42:01,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:01,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:42:01,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:42:01,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:01" (1/1) ... [2019-10-15 01:42:01,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@472088b0 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 01:42:01,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:01" (1/1) ... [2019-10-15 01:42:01,195 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:42:01,255 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:42:01,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:01,780 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:42:01,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:01,893 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:42:01,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:01 WrapperNode [2019-10-15 01:42:01,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:01,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:42:01,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:42:01,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:42:01,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:01" (1/1) ... [2019-10-15 01:42:01,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:01" (1/1) ... [2019-10-15 01:42:01,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:01" (1/1) ... [2019-10-15 01:42:01,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:01" (1/1) ... [2019-10-15 01:42:01,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:01" (1/1) ... [2019-10-15 01:42:02,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:01" (1/1) ... [2019-10-15 01:42:02,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:01" (1/1) ... [2019-10-15 01:42:02,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:42:02,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:42:02,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:42:02,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:42:02,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:01" (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 01:42:02,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:42:02,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:42:02,081 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:42:02,081 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:42:02,081 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:42:02,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:42:02,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:42:02,082 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:42:02,082 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:42:02,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:42:02,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:42:04,109 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:42:04,111 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:42:04,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:04 BoogieIcfgContainer [2019-10-15 01:42:04,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:42:04,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:42:04,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:42:04,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:42:04,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:42:01" (1/3) ... [2019-10-15 01:42:04,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37101690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:04, skipping insertion in model container [2019-10-15 01:42:04,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:01" (2/3) ... [2019-10-15 01:42:04,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37101690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:04, skipping insertion in model container [2019-10-15 01:42:04,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:04" (3/3) ... [2019-10-15 01:42:04,124 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label28.c [2019-10-15 01:42:04,133 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:42:04,140 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:42:04,151 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:42:04,178 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:42:04,179 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:42:04,179 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:42:04,179 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:42:04,180 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:42:04,180 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:42:04,180 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:42:04,180 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:42:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:42:04,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:42:04,213 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:04,214 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 01:42:04,217 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:04,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:04,222 INFO L82 PathProgramCache]: Analyzing trace with hash -219359433, now seen corresponding path program 1 times [2019-10-15 01:42:04,232 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:04,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613879598] [2019-10-15 01:42:04,232 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:04,233 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:04,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:04,593 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 01:42:04,594 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613879598] [2019-10-15 01:42:04,595 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:04,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:04,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928455684] [2019-10-15 01:42:04,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:04,604 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:04,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:04,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:04,623 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:42:05,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:05,204 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:42:05,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:05,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:42:05,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:05,234 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:42:05,235 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:42:05,242 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 01:42:05,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:42:05,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:42:05,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:42:05,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-10-15 01:42:05,342 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-10-15 01:42:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:05,343 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-10-15 01:42:05,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:05,343 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-10-15 01:42:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-15 01:42:05,352 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:05,352 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 01:42:05,353 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:05,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:05,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1874054770, now seen corresponding path program 1 times [2019-10-15 01:42:05,356 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:05,356 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871480734] [2019-10-15 01:42:05,357 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:05,357 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:05,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:05,555 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 01:42:05,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871480734] [2019-10-15 01:42:05,556 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:05,556 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:42:05,556 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308136777] [2019-10-15 01:42:05,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:42:05,559 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:05,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:42:05,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:42:05,559 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-10-15 01:42:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:06,417 INFO L93 Difference]: Finished difference Result 547 states and 1064 transitions. [2019-10-15 01:42:06,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:42:06,417 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-10-15 01:42:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:06,423 INFO L225 Difference]: With dead ends: 547 [2019-10-15 01:42:06,423 INFO L226 Difference]: Without dead ends: 377 [2019-10-15 01:42:06,426 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 01:42:06,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-10-15 01:42:06,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 355. [2019-10-15 01:42:06,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-10-15 01:42:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 642 transitions. [2019-10-15 01:42:06,483 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 642 transitions. Word has length 101 [2019-10-15 01:42:06,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:06,483 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 642 transitions. [2019-10-15 01:42:06,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:42:06,484 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 642 transitions. [2019-10-15 01:42:06,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-15 01:42:06,488 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:06,488 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 01:42:06,489 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:06,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:06,489 INFO L82 PathProgramCache]: Analyzing trace with hash 750787689, now seen corresponding path program 1 times [2019-10-15 01:42:06,490 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:06,490 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588477497] [2019-10-15 01:42:06,490 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:06,490 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:06,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:06,610 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 01:42:06,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588477497] [2019-10-15 01:42:06,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177195469] [2019-10-15 01:42:06,611 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 01:42:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:06,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:06,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:06,800 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 01:42:06,800 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:06,907 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 01:42:06,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [704837429] [2019-10-15 01:42:06,972 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:06,972 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:06,985 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:06,999 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:07,000 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:07,403 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:09,013 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 134 [2019-10-15 01:42:09,538 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 135 [2019-10-15 01:42:10,094 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-10-15 01:42:19,041 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2019-10-15 01:42:19,199 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 16008 conjuctions. This might take some time... [2019-10-15 01:42:19,980 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 45 [2019-10-15 01:42:20,251 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 21656 conjuctions. This might take some time... [2019-10-15 01:42:21,124 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 45 [2019-10-15 01:42:21,409 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 21656 conjuctions. This might take some time... [2019-10-15 01:42:22,436 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:22,452 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:22,728 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2019-10-15 01:42:22,966 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:23,268 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:23,572 WARN L191 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:42:24,064 WARN L191 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 82 [2019-10-15 01:42:24,355 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:42:24,603 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2019-10-15 01:42:24,875 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2019-10-15 01:42:25,425 WARN L191 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2019-10-15 01:42:26,090 WARN L191 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 87 [2019-10-15 01:42:26,340 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2019-10-15 01:42:29,191 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:42:29,191 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 12] total 22 [2019-10-15 01:42:29,191 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760134901] [2019-10-15 01:42:29,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:42:29,193 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:29,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:42:29,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:42:29,194 INFO L87 Difference]: Start difference. First operand 355 states and 642 transitions. Second operand 22 states. [2019-10-15 01:42:29,489 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:29,847 WARN L191 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2019-10-15 01:42:30,262 WARN L191 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2019-10-15 01:42:30,673 WARN L191 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 96 [2019-10-15 01:42:31,008 WARN L191 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:42:31,348 WARN L191 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:42:31,579 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2019-10-15 01:42:31,860 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2019-10-15 01:42:34,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:34,751 INFO L93 Difference]: Finished difference Result 882 states and 1610 transitions. [2019-10-15 01:42:34,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 01:42:34,751 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2019-10-15 01:42:34,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:34,755 INFO L225 Difference]: With dead ends: 882 [2019-10-15 01:42:34,756 INFO L226 Difference]: Without dead ends: 532 [2019-10-15 01:42:34,760 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 241 SyntacticMatches, 80 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 01:42:34,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2019-10-15 01:42:34,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 520. [2019-10-15 01:42:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2019-10-15 01:42:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 788 transitions. [2019-10-15 01:42:34,796 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 788 transitions. Word has length 109 [2019-10-15 01:42:34,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:34,797 INFO L462 AbstractCegarLoop]: Abstraction has 520 states and 788 transitions. [2019-10-15 01:42:34,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:42:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 788 transitions. [2019-10-15 01:42:34,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-15 01:42:34,802 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:34,802 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 01:42:35,003 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:35,004 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:35,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:35,005 INFO L82 PathProgramCache]: Analyzing trace with hash 429772394, now seen corresponding path program 1 times [2019-10-15 01:42:35,005 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:35,005 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248879652] [2019-10-15 01:42:35,006 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:35,006 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:35,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:35,100 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 01:42:35,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248879652] [2019-10-15 01:42:35,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006475665] [2019-10-15 01:42:35,101 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 01:42:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:35,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:35,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:35,268 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 01:42:35,268 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:35,319 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 01:42:35,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1533202858] [2019-10-15 01:42:35,324 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:35,324 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:35,325 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:35,325 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:35,325 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:35,431 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:36,595 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 83 for LOIs [2019-10-15 01:42:37,969 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2019-10-15 01:42:38,057 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 44 [2019-10-15 01:42:38,181 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 44 [2019-10-15 01:42:38,349 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:38,361 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:38,593 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2019-10-15 01:42:38,834 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53