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_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:41:44,833 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:41:44,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:41:44,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:41:44,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:41:44,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:41:44,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:41:44,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:41:44,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:41:44,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:41:44,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:41:44,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:41:44,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:41:44,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:41:44,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:41:44,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:41:44,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:41:44,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:41:44,886 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 01:41:44,908 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:41:44,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:41:44,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:41:44,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:41:44,911 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:41:44,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:41:44,911 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:41:44,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:41:44,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:41:44,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:41:44,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:41:44,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:41:44,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:41:44,912 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:41:44,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:41:44,913 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:41:44,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:41:44,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:41:44,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:41:44,915 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:41:44,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:41:44,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:41:44,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:41:44,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:41:44,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:41:44,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:41:44,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:41:44,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:41:44,917 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 01:41:45,192 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:41:45,208 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:41:45,213 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:41:45,215 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:41:45,215 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:41:45,216 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label17.c [2019-10-15 01:41:45,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d673dbac3/e1dc6bb95b584f1bbe9ab21ce24b866e/FLAGc61d402de [2019-10-15 01:41:45,900 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:41:45,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label17.c [2019-10-15 01:41:45,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d673dbac3/e1dc6bb95b584f1bbe9ab21ce24b866e/FLAGc61d402de [2019-10-15 01:41:46,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d673dbac3/e1dc6bb95b584f1bbe9ab21ce24b866e [2019-10-15 01:41:46,172 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:41:46,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:41:46,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:46,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:41:46,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:41:46,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:46" (1/1) ... [2019-10-15 01:41:46,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14f2c9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:46, skipping insertion in model container [2019-10-15 01:41:46,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:46" (1/1) ... [2019-10-15 01:41:46,191 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:41:46,234 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:41:46,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:46,781 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:41:46,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:46,959 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:41:46,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:46 WrapperNode [2019-10-15 01:41:46,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:46,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:41:46,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:41:46,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:41:46,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:46" (1/1) ... [2019-10-15 01:41:46,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:46" (1/1) ... [2019-10-15 01:41:47,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:46" (1/1) ... [2019-10-15 01:41:47,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:46" (1/1) ... [2019-10-15 01:41:47,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:46" (1/1) ... [2019-10-15 01:41:47,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:46" (1/1) ... [2019-10-15 01:41:47,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:46" (1/1) ... [2019-10-15 01:41:47,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:41:47,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:41:47,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:41:47,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:41:47,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:46" (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 01:41:47,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:41:47,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:41:47,191 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:41:47,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:41:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:41:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:41:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:41:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:41:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:41:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:41:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:41:49,254 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:41:49,254 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:41:49,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:49 BoogieIcfgContainer [2019-10-15 01:41:49,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:41:49,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:41:49,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:41:49,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:41:49,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:41:46" (1/3) ... [2019-10-15 01:41:49,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1aad45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:49, skipping insertion in model container [2019-10-15 01:41:49,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:46" (2/3) ... [2019-10-15 01:41:49,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1aad45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:49, skipping insertion in model container [2019-10-15 01:41:49,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:49" (3/3) ... [2019-10-15 01:41:49,265 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label17.c [2019-10-15 01:41:49,274 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:41:49,283 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:41:49,294 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:41:49,320 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:41:49,320 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:41:49,320 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:41:49,320 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:41:49,321 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:41:49,321 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:41:49,321 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:41:49,321 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:41:49,341 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:41:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:41:49,351 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:49,352 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 01:41:49,354 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:49,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:49,359 INFO L82 PathProgramCache]: Analyzing trace with hash -219360713, now seen corresponding path program 1 times [2019-10-15 01:41:49,367 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:49,367 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463951312] [2019-10-15 01:41:49,367 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:49,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:49,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:49,792 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 01:41:49,793 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463951312] [2019-10-15 01:41:49,794 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:49,794 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:49,794 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041960677] [2019-10-15 01:41:49,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:49,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:49,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:49,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:49,817 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:41:50,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:50,382 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:41:50,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:50,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:41:50,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:50,412 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:41:50,412 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:41:50,419 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 01:41:50,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:41:50,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:41:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:41:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-10-15 01:41:50,537 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-10-15 01:41:50,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:50,539 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-10-15 01:41:50,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:50,540 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-10-15 01:41:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-15 01:41:50,555 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:50,555 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 01:41:50,556 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:50,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:50,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1874056050, now seen corresponding path program 1 times [2019-10-15 01:41:50,557 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:50,557 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835781990] [2019-10-15 01:41:50,558 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:50,558 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:50,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:50,783 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 01:41:50,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835781990] [2019-10-15 01:41:50,784 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:50,784 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:41:50,785 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700823372] [2019-10-15 01:41:50,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:41:50,787 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:50,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:41:50,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:41:50,788 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-10-15 01:41:51,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:51,626 INFO L93 Difference]: Finished difference Result 547 states and 1064 transitions. [2019-10-15 01:41:51,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:41:51,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-10-15 01:41:51,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:51,632 INFO L225 Difference]: With dead ends: 547 [2019-10-15 01:41:51,633 INFO L226 Difference]: Without dead ends: 377 [2019-10-15 01:41:51,635 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 01:41:51,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-10-15 01:41:51,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 355. [2019-10-15 01:41:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-10-15 01:41:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 642 transitions. [2019-10-15 01:41:51,708 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 642 transitions. Word has length 101 [2019-10-15 01:41:51,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:51,709 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 642 transitions. [2019-10-15 01:41:51,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:41:51,709 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 642 transitions. [2019-10-15 01:41:51,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-15 01:41:51,716 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:51,717 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 01:41:51,717 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:51,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:51,718 INFO L82 PathProgramCache]: Analyzing trace with hash 750786409, now seen corresponding path program 1 times [2019-10-15 01:41:51,718 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:51,719 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794495686] [2019-10-15 01:41:51,719 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:51,719 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:51,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:51,905 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 01:41:51,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794495686] [2019-10-15 01:41:51,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472468552] [2019-10-15 01:41:51,906 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 01:41:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:52,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:52,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:52,159 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 01:41:52,159 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:52,258 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 01:41:52,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1137509294] [2019-10-15 01:41:52,320 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:52,320 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:52,329 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:52,338 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:52,339 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:52,672 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:41:55,052 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-10-15 01:42:03,709 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2019-10-15 01:42:03,893 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 15776 conjuctions. This might take some time... [2019-10-15 01:42:04,858 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2019-10-15 01:42:05,081 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 19672 conjuctions. This might take some time... [2019-10-15 01:42:06,131 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2019-10-15 01:42:06,308 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 19672 conjuctions. This might take some time... [2019-10-15 01:42:07,429 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:07,440 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:07,677 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:07,961 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:08,262 WARN L191 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:42:08,759 WARN L191 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 82 [2019-10-15 01:42:09,042 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:42:09,296 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2019-10-15 01:42:09,582 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2019-10-15 01:42:10,169 WARN L191 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2019-10-15 01:42:10,842 WARN L191 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 87 [2019-10-15 01:42:11,106 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2019-10-15 01:42:13,753 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:42:13,754 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 21 [2019-10-15 01:42:13,754 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215721506] [2019-10-15 01:42:13,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-15 01:42:13,756 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:13,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-15 01:42:13,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:42:13,757 INFO L87 Difference]: Start difference. First operand 355 states and 642 transitions. Second operand 13 states. [2019-10-15 01:42:14,043 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:14,426 WARN L191 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2019-10-15 01:42:14,806 WARN L191 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2019-10-15 01:42:15,208 WARN L191 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 96 [2019-10-15 01:42:15,535 WARN L191 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:42:15,866 WARN L191 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:42:18,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:18,195 INFO L93 Difference]: Finished difference Result 880 states and 1587 transitions. [2019-10-15 01:42:18,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:42:18,195 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 109 [2019-10-15 01:42:18,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:18,199 INFO L225 Difference]: With dead ends: 880 [2019-10-15 01:42:18,199 INFO L226 Difference]: Without dead ends: 530 [2019-10-15 01:42:18,203 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 236 SyntacticMatches, 80 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:42:18,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2019-10-15 01:42:18,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 526. [2019-10-15 01:42:18,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2019-10-15 01:42:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 827 transitions. [2019-10-15 01:42:18,246 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 827 transitions. Word has length 109 [2019-10-15 01:42:18,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:18,247 INFO L462 AbstractCegarLoop]: Abstraction has 526 states and 827 transitions. [2019-10-15 01:42:18,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-15 01:42:18,250 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 827 transitions. [2019-10-15 01:42:18,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 01:42:18,252 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:18,253 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 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] [2019-10-15 01:42:18,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:18,454 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:18,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:18,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1234609666, now seen corresponding path program 1 times [2019-10-15 01:42:18,456 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:18,456 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26687862] [2019-10-15 01:42:18,457 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:18,457 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:18,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:42:18,652 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26687862] [2019-10-15 01:42:18,652 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262824054] [2019-10-15 01:42:18,652 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 01:42:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:18,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:18,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:42:18,827 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:42:18,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [154415872] [2019-10-15 01:42:18,908 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:18,908 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:18,910 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:18,910 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:18,910 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:19,054 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:20,267 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 84 for LOIs [2019-10-15 01:42:21,783 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2019-10-15 01:42:21,822 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 39 [2019-10-15 01:42:21,910 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 39 [2019-10-15 01:42:22,012 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:22,024 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:22,248 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:22,529 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:22,793 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2019-10-15 01:42:23,216 WARN L191 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 76 [2019-10-15 01:42:23,471 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2019-10-15 01:42:23,692 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2019-10-15 01:42:23,932 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2019-10-15 01:42:24,153 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2019-10-15 01:42:24,418 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2019-10-15 01:42:24,738 WARN L191 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 76