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_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:42:24,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:42:24,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:42:24,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:42:24,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:42:24,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:42:24,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:42:24,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:42:24,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:42:24,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:42:24,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:42:24,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:42:24,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:42:24,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:42:24,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:42:24,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:42:24,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:42:24,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:42:24,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:42:24,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:42:24,592 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 01:42:24,605 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:42:24,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:42:24,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:42:24,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:42:24,607 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:42:24,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:42:24,608 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:42:24,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:42:24,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:42:24,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:42:24,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:42:24,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:42:24,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:42:24,609 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:42:24,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:42:24,609 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:42:24,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:42:24,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:42:24,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:42:24,610 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:42:24,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:42:24,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:24,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:42:24,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:42:24,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:42:24,611 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:42:24,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:42:24,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:42:24,612 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 01:42:24,890 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:42:24,907 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:42:24,910 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:42:24,915 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:42:24,915 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:42:24,916 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label36.c [2019-10-15 01:42:24,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd90cbb68/c7dfb0d5a64a4f9b98721d8d59298507/FLAGcaa3b3a55 [2019-10-15 01:42:25,503 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:42:25,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label36.c [2019-10-15 01:42:25,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd90cbb68/c7dfb0d5a64a4f9b98721d8d59298507/FLAGcaa3b3a55 [2019-10-15 01:42:25,795 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd90cbb68/c7dfb0d5a64a4f9b98721d8d59298507 [2019-10-15 01:42:25,807 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:42:25,808 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:42:25,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:25,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:42:25,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:42:25,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:25" (1/1) ... [2019-10-15 01:42:25,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23b83b65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:25, skipping insertion in model container [2019-10-15 01:42:25,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:25" (1/1) ... [2019-10-15 01:42:25,824 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:42:25,876 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:42:26,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:26,491 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:42:26,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:26,601 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:42:26,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:26 WrapperNode [2019-10-15 01:42:26,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:26,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:42:26,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:42:26,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:42:26,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:26" (1/1) ... [2019-10-15 01:42:26,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:26" (1/1) ... [2019-10-15 01:42:26,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:26" (1/1) ... [2019-10-15 01:42:26,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:26" (1/1) ... [2019-10-15 01:42:26,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:26" (1/1) ... [2019-10-15 01:42:26,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:26" (1/1) ... [2019-10-15 01:42:26,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:26" (1/1) ... [2019-10-15 01:42:26,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:42:26,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:42:26,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:42:26,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:42:26,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:26" (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 01:42:26,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:42:26,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:42:26,793 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:42:26,793 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:42:26,794 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:42:26,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:42:26,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:42:26,796 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:42:26,797 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:42:26,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:42:26,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:42:28,814 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:42:28,815 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:42:28,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:28 BoogieIcfgContainer [2019-10-15 01:42:28,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:42:28,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:42:28,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:42:28,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:42:28,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:42:25" (1/3) ... [2019-10-15 01:42:28,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37009c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:28, skipping insertion in model container [2019-10-15 01:42:28,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:26" (2/3) ... [2019-10-15 01:42:28,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37009c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:28, skipping insertion in model container [2019-10-15 01:42:28,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:28" (3/3) ... [2019-10-15 01:42:28,825 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label36.c [2019-10-15 01:42:28,835 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:42:28,843 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:42:28,854 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:42:28,880 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:42:28,880 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:42:28,881 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:42:28,881 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:42:28,882 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:42:28,882 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:42:28,883 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:42:28,883 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:42:28,904 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:42:28,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:42:28,914 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:28,915 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 01:42:28,917 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:28,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:28,924 INFO L82 PathProgramCache]: Analyzing trace with hash -219357385, now seen corresponding path program 1 times [2019-10-15 01:42:28,933 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:28,933 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313802667] [2019-10-15 01:42:28,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:28,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:28,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:29,445 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 01:42:29,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313802667] [2019-10-15 01:42:29,447 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:29,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:29,452 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795889069] [2019-10-15 01:42:29,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:29,463 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:29,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:29,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:29,480 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:42:30,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:30,093 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:42:30,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:30,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:42:30,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:30,120 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:42:30,120 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:42:30,127 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 01:42:30,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:42:30,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:42:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:42:30,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-10-15 01:42:30,227 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-10-15 01:42:30,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:30,228 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-10-15 01:42:30,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:30,228 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-10-15 01:42:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-15 01:42:30,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:30,234 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 01:42:30,234 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:30,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:30,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1874052722, now seen corresponding path program 1 times [2019-10-15 01:42:30,235 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:30,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40872782] [2019-10-15 01:42:30,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:30,236 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:30,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:30,382 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 01:42:30,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40872782] [2019-10-15 01:42:30,384 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:30,384 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:42:30,384 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162442021] [2019-10-15 01:42:30,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:42:30,387 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:30,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:42:30,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:42:30,387 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-10-15 01:42:31,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:31,124 INFO L93 Difference]: Finished difference Result 549 states and 1065 transitions. [2019-10-15 01:42:31,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:42:31,125 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-10-15 01:42:31,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:31,130 INFO L225 Difference]: With dead ends: 549 [2019-10-15 01:42:31,131 INFO L226 Difference]: Without dead ends: 379 [2019-10-15 01:42:31,133 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 01:42:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2019-10-15 01:42:31,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 355. [2019-10-15 01:42:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-10-15 01:42:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 642 transitions. [2019-10-15 01:42:31,219 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 642 transitions. Word has length 101 [2019-10-15 01:42:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:31,219 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 642 transitions. [2019-10-15 01:42:31,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:42:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 642 transitions. [2019-10-15 01:42:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-15 01:42:31,224 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:31,224 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 01:42:31,224 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:31,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:31,225 INFO L82 PathProgramCache]: Analyzing trace with hash 750789737, now seen corresponding path program 1 times [2019-10-15 01:42:31,225 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:31,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27936513] [2019-10-15 01:42:31,225 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:31,226 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:31,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:31,361 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 01:42:31,362 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27936513] [2019-10-15 01:42:31,362 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159150026] [2019-10-15 01:42:31,363 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 01:42:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:31,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:31,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:31,551 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 01:42:31,552 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:31,637 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 01:42:31,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1094239490] [2019-10-15 01:42:31,671 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:31,671 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:31,686 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:31,701 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:31,703 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:32,005 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:34,165 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-10-15 01:42:42,961 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2019-10-15 01:42:43,027 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7640 conjuctions. This might take some time... [2019-10-15 01:42:43,427 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2019-10-15 01:42:43,765 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 15560 conjuctions. This might take some time... [2019-10-15 01:42:44,351 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2019-10-15 01:42:44,633 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 15560 conjuctions. This might take some time... [2019-10-15 01:42:45,251 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:45,268 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:45,528 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:45,820 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:46,121 WARN L191 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:42:46,617 WARN L191 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 82 [2019-10-15 01:42:46,908 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:42:47,166 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2019-10-15 01:42:47,453 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2019-10-15 01:42:48,022 WARN L191 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2019-10-15 01:42:48,684 WARN L191 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 87 [2019-10-15 01:42:48,950 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2019-10-15 01:42:51,645 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:42:51,645 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 21 [2019-10-15 01:42:51,646 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104109050] [2019-10-15 01:42:51,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-15 01:42:51,648 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:51,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-15 01:42:51,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:42:51,649 INFO L87 Difference]: Start difference. First operand 355 states and 642 transitions. Second operand 13 states. [2019-10-15 01:42:51,988 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:52,431 WARN L191 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2019-10-15 01:42:52,859 WARN L191 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2019-10-15 01:42:53,275 WARN L191 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 96 [2019-10-15 01:42:53,611 WARN L191 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:42:53,952 WARN L191 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:42:56,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:56,298 INFO L93 Difference]: Finished difference Result 880 states and 1587 transitions. [2019-10-15 01:42:56,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:42:56,299 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 109 [2019-10-15 01:42:56,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:56,302 INFO L225 Difference]: With dead ends: 880 [2019-10-15 01:42:56,302 INFO L226 Difference]: Without dead ends: 530 [2019-10-15 01:42:56,305 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 236 SyntacticMatches, 80 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:42:56,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2019-10-15 01:42:56,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 526. [2019-10-15 01:42:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2019-10-15 01:42:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 827 transitions. [2019-10-15 01:42:56,337 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 827 transitions. Word has length 109 [2019-10-15 01:42:56,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:56,338 INFO L462 AbstractCegarLoop]: Abstraction has 526 states and 827 transitions. [2019-10-15 01:42:56,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-15 01:42:56,338 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 827 transitions. [2019-10-15 01:42:56,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 01:42:56,341 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:56,341 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 01:42:56,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:56,549 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:56,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:56,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1234606338, now seen corresponding path program 1 times [2019-10-15 01:42:56,550 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:56,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464266691] [2019-10-15 01:42:56,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:56,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:56,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:56,715 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 01:42:56,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464266691] [2019-10-15 01:42:56,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831008182] [2019-10-15 01:42:56,716 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 01:42:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:56,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:56,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:56,899 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 01:42:56,900 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:56,962 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 01:42:56,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [199509584] [2019-10-15 01:42:56,968 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:56,969 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:56,970 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:56,970 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:56,970 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:57,083 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:58,029 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 84 for LOIs [2019-10-15 01:42:59,552 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-10-15 01:42:59,589 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 52 [2019-10-15 01:42:59,686 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 52 [2019-10-15 01:42:59,814 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:59,824 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:43:00,063 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:43:00,340 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:43:00,595 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2019-10-15 01:43:01,013 WARN L191 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 76 [2019-10-15 01:43:01,268 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2019-10-15 01:43:01,487 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2019-10-15 01:43:01,728 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2019-10-15 01:43:01,951 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2019-10-15 01:43:02,211 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2019-10-15 01:43:02,829 WARN L191 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 80