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_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:42:03,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:42:03,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:42:03,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:42:03,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:42:03,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:42:03,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:42:03,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:42:03,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:42:03,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:42:03,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:42:03,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:42:03,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:42:03,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:42:03,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:42:03,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:42:03,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:42:03,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:42:03,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:42:03,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:42:03,412 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:42:03,430 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:42:03,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:42:03,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:42:03,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:42:03,432 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:42:03,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:42:03,432 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:42:03,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:42:03,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:42:03,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:42:03,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:42:03,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:42:03,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:42:03,435 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:42:03,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:42:03,435 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:42:03,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:42:03,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:42:03,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:42:03,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:42:03,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:42:03,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:03,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:42:03,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:42:03,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:42:03,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:42:03,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:42:03,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:42:03,438 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 01:42:03,716 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:42:03,730 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:42:03,733 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:42:03,735 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:42:03,735 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:42:03,736 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label31.c [2019-10-15 01:42:03,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1954064f5/5f2a85368db44c1a8a01bdb7068052a0/FLAGee1521af5 [2019-10-15 01:42:04,373 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:42:04,373 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label31.c [2019-10-15 01:42:04,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1954064f5/5f2a85368db44c1a8a01bdb7068052a0/FLAGee1521af5 [2019-10-15 01:42:04,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1954064f5/5f2a85368db44c1a8a01bdb7068052a0 [2019-10-15 01:42:04,665 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:42:04,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:42:04,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:04,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:42:04,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:42:04,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:04" (1/1) ... [2019-10-15 01:42:04,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e788b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:04, skipping insertion in model container [2019-10-15 01:42:04,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:04" (1/1) ... [2019-10-15 01:42:04,682 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:42:04,743 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:42:05,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:05,279 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:42:05,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:05,429 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:42:05,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:05 WrapperNode [2019-10-15 01:42:05,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:05,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:42:05,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:42:05,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:42:05,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:05" (1/1) ... [2019-10-15 01:42:05,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:05" (1/1) ... [2019-10-15 01:42:05,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:05" (1/1) ... [2019-10-15 01:42:05,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:05" (1/1) ... [2019-10-15 01:42:05,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:05" (1/1) ... [2019-10-15 01:42:05,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:05" (1/1) ... [2019-10-15 01:42:05,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:05" (1/1) ... [2019-10-15 01:42:05,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:42:05,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:42:05,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:42:05,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:42:05,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:05" (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 01:42:05,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:42:05,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:42:05,594 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:42:05,594 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:42:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:42:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:42:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:42:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:42:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:42:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:42:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:42:07,603 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:42:07,604 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:42:07,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:07 BoogieIcfgContainer [2019-10-15 01:42:07,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:42:07,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:42:07,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:42:07,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:42:07,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:42:04" (1/3) ... [2019-10-15 01:42:07,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ceadeda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:07, skipping insertion in model container [2019-10-15 01:42:07,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:05" (2/3) ... [2019-10-15 01:42:07,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ceadeda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:07, skipping insertion in model container [2019-10-15 01:42:07,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:07" (3/3) ... [2019-10-15 01:42:07,615 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label31.c [2019-10-15 01:42:07,625 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:42:07,635 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:42:07,647 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:42:07,682 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:42:07,682 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:42:07,682 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:42:07,683 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:42:07,683 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:42:07,683 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:42:07,683 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:42:07,683 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:42:07,723 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:42:07,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:42:07,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:07,734 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 01:42:07,737 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:07,743 INFO L82 PathProgramCache]: Analyzing trace with hash -219361481, now seen corresponding path program 1 times [2019-10-15 01:42:07,753 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:07,754 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263385671] [2019-10-15 01:42:07,754 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:07,754 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:07,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:08,164 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 01:42:08,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263385671] [2019-10-15 01:42:08,166 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:08,166 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:08,167 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343335510] [2019-10-15 01:42:08,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:08,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:08,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:08,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:08,194 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:42:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:08,803 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:42:08,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:08,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:42:08,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:08,832 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:42:08,832 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:42:08,839 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 01:42:08,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:42:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:42:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:42:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 317 transitions. [2019-10-15 01:42:08,946 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 317 transitions. Word has length 86 [2019-10-15 01:42:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:08,949 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 317 transitions. [2019-10-15 01:42:08,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:08,950 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 317 transitions. [2019-10-15 01:42:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 01:42:08,963 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:08,964 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:08,964 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:08,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:08,965 INFO L82 PathProgramCache]: Analyzing trace with hash -11024921, now seen corresponding path program 1 times [2019-10-15 01:42:08,966 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:08,966 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455402439] [2019-10-15 01:42:08,966 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:08,966 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:08,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:09,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455402439] [2019-10-15 01:42:09,158 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:09,158 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:42:09,158 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005913726] [2019-10-15 01:42:09,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:42:09,161 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:09,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:42:09,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:42:09,162 INFO L87 Difference]: Start difference. First operand 175 states and 317 transitions. Second operand 6 states. [2019-10-15 01:42:09,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:09,695 INFO L93 Difference]: Finished difference Result 531 states and 984 transitions. [2019-10-15 01:42:09,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:42:09,696 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-10-15 01:42:09,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:09,701 INFO L225 Difference]: With dead ends: 531 [2019-10-15 01:42:09,701 INFO L226 Difference]: Without dead ends: 361 [2019-10-15 01:42:09,704 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 01:42:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2019-10-15 01:42:09,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 355. [2019-10-15 01:42:09,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-10-15 01:42:09,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 626 transitions. [2019-10-15 01:42:09,753 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 626 transitions. Word has length 104 [2019-10-15 01:42:09,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:09,754 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 626 transitions. [2019-10-15 01:42:09,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:42:09,759 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 626 transitions. [2019-10-15 01:42:09,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-15 01:42:09,762 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:09,762 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1] [2019-10-15 01:42:09,763 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:09,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:09,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1798887124, now seen corresponding path program 1 times [2019-10-15 01:42:09,763 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:09,764 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862850311] [2019-10-15 01:42:09,764 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:09,764 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:09,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:09,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862850311] [2019-10-15 01:42:09,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959034949] [2019-10-15 01:42:09,909 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 01:42:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:10,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:10,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:10,128 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:10,230 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [236368756] [2019-10-15 01:42:10,262 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:10,262 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:10,269 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:10,278 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:10,278 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:10,601 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2019-10-15 01:42:12,748 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-10-15 01:42:17,634 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-10-15 01:42:17,687 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5040 conjuctions. This might take some time... [2019-10-15 01:42:17,826 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 37 [2019-10-15 01:42:17,919 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5772 conjuctions. This might take some time... [2019-10-15 01:42:18,038 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 37 [2019-10-15 01:42:18,102 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5772 conjuctions. This might take some time... [2019-10-15 01:42:18,227 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:18,246 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:18,484 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:18,811 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:19,102 WARN L191 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:42:19,418 WARN L191 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2019-10-15 01:42:19,696 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2019-10-15 01:42:19,947 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2019-10-15 01:42:20,226 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2019-10-15 01:42:21,057 WARN L191 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 73 [2019-10-15 01:42:22,086 WARN L191 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 86 [2019-10-15 01:42:22,346 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-10-15 01:42:24,960 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:42:24,960 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 21 [2019-10-15 01:42:24,961 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532540209] [2019-10-15 01:42:24,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-15 01:42:24,963 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:24,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-15 01:42:24,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:42:24,964 INFO L87 Difference]: Start difference. First operand 355 states and 626 transitions. Second operand 13 states. [2019-10-15 01:42:25,287 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:25,639 WARN L191 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 93 [2019-10-15 01:42:26,007 WARN L191 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 99 [2019-10-15 01:42:26,389 WARN L191 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 96 [2019-10-15 01:42:26,746 WARN L191 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2019-10-15 01:42:27,079 WARN L191 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95 [2019-10-15 01:42:29,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:29,488 INFO L93 Difference]: Finished difference Result 890 states and 1557 transitions. [2019-10-15 01:42:29,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:42:29,489 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 112 [2019-10-15 01:42:29,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:29,493 INFO L225 Difference]: With dead ends: 890 [2019-10-15 01:42:29,493 INFO L226 Difference]: Without dead ends: 540 [2019-10-15 01:42:29,496 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 239 SyntacticMatches, 83 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:42:29,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2019-10-15 01:42:29,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 532. [2019-10-15 01:42:29,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2019-10-15 01:42:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 819 transitions. [2019-10-15 01:42:29,530 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 819 transitions. Word has length 112 [2019-10-15 01:42:29,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:29,530 INFO L462 AbstractCegarLoop]: Abstraction has 532 states and 819 transitions. [2019-10-15 01:42:29,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-15 01:42:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 819 transitions. [2019-10-15 01:42:29,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-15 01:42:29,532 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:29,533 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:42:29,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:29,738 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:29,738 INFO L82 PathProgramCache]: Analyzing trace with hash -478264390, now seen corresponding path program 1 times [2019-10-15 01:42:29,739 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:29,740 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954914006] [2019-10-15 01:42:29,740 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:29,741 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:29,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:29,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954914006] [2019-10-15 01:42:29,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052430672] [2019-10-15 01:42:29,878 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 01:42:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:29,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:29,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:30,025 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:30,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307317403] [2019-10-15 01:42:30,080 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:30,080 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:30,081 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:30,081 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:30,082 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:30,206 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 85 for LOIs [2019-10-15 01:42:31,482 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-10-15 01:42:35,019 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-10-15 01:42:35,045 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5040 conjuctions. This might take some time... [2019-10-15 01:42:35,113 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 37 [2019-10-15 01:42:35,167 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5772 conjuctions. This might take some time... [2019-10-15 01:42:35,260 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 37 [2019-10-15 01:42:35,311 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5772 conjuctions. This might take some time... [2019-10-15 01:42:35,449 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:35,460 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:35,686 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:35,986 WARN L191 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:36,268 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:42:36,589 WARN L191 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 87 [2019-10-15 01:42:36,867 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2019-10-15 01:42:37,122 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2019-10-15 01:42:37,394 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2019-10-15 01:42:37,649 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-10-15 01:42:38,034 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2019-10-15 01:42:38,810 WARN L191 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 79 [2019-10-15 01:42:41,141 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:42:41,141 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 21 [2019-10-15 01:42:41,142 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938210051] [2019-10-15 01:42:41,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-15 01:42:41,143 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:41,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-15 01:42:41,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:42:41,144 INFO L87 Difference]: Start difference. First operand 532 states and 819 transitions. Second operand 13 states. [2019-10-15 01:42:41,436 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:41,797 WARN L191 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 93 [2019-10-15 01:42:42,216 WARN L191 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 101 [2019-10-15 01:42:42,664 WARN L191 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 96 [2019-10-15 01:42:43,015 WARN L191 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2019-10-15 01:42:43,367 WARN L191 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95