/usr/bin/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/Problem15_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 02:02:11,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 02:02:11,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 02:02:11,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 02:02:11,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 02:02:11,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 02:02:11,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 02:02:11,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 02:02:11,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 02:02:11,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 02:02:11,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 02:02:11,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 02:02:11,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 02:02:11,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 02:02:11,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 02:02:11,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 02:02:11,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 02:02:11,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 02:02:11,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 02:02:11,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 02:02:11,366 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 [2019-11-07 02:02:11,401 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 02:02:11,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 02:02:11,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 02:02:11,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 02:02:11,403 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 02:02:11,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 02:02:11,403 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 02:02:11,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 02:02:11,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 02:02:11,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 02:02:11,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 02:02:11,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 02:02:11,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 02:02:11,404 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 02:02:11,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 02:02:11,408 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 02:02:11,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 02:02:11,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 02:02:11,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 02:02:11,408 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 02:02:11,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 02:02:11,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 02:02:11,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 02:02:11,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 02:02:11,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 02:02:11,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 02:02:11,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 02:02:11,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 02:02:11,410 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 [2019-11-07 02:02:11,733 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 02:02:11,752 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 02:02:11,755 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 02:02:11,757 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 02:02:11,757 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 02:02:11,758 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label55.c [2019-11-07 02:02:11,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4d3994b1/ff6b9852625f4650a44bc3380c959466/FLAG8e68e1a2f [2019-11-07 02:02:12,461 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 02:02:12,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label55.c [2019-11-07 02:02:12,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4d3994b1/ff6b9852625f4650a44bc3380c959466/FLAG8e68e1a2f [2019-11-07 02:02:12,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4d3994b1/ff6b9852625f4650a44bc3380c959466 [2019-11-07 02:02:12,663 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 02:02:12,665 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 02:02:12,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 02:02:12,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 02:02:12,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 02:02:12,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:12" (1/1) ... [2019-11-07 02:02:12,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f99a56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:12, skipping insertion in model container [2019-11-07 02:02:12,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:12" (1/1) ... [2019-11-07 02:02:12,686 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 02:02:12,776 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 02:02:13,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 02:02:13,704 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 02:02:14,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 02:02:14,111 INFO L192 MainTranslator]: Completed translation [2019-11-07 02:02:14,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:14 WrapperNode [2019-11-07 02:02:14,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 02:02:14,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 02:02:14,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 02:02:14,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 02:02:14,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:14" (1/1) ... [2019-11-07 02:02:14,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:14" (1/1) ... [2019-11-07 02:02:14,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:14" (1/1) ... [2019-11-07 02:02:14,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:14" (1/1) ... [2019-11-07 02:02:14,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:14" (1/1) ... [2019-11-07 02:02:14,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:14" (1/1) ... [2019-11-07 02:02:14,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:14" (1/1) ... [2019-11-07 02:02:14,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 02:02:14,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 02:02:14,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 02:02:14,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 02:02:14,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:14" (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 [2019-11-07 02:02:14,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 02:02:14,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 02:02:14,391 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 02:02:14,391 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-07 02:02:14,391 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 02:02:14,422 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 02:02:14,422 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-07 02:02:14,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 02:02:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 02:02:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 02:02:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 02:02:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 02:02:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 02:02:23,633 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 02:02:23,633 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 02:02:23,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:02:23 BoogieIcfgContainer [2019-11-07 02:02:23,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 02:02:23,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 02:02:23,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 02:02:23,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 02:02:23,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:02:12" (1/3) ... [2019-11-07 02:02:23,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693bef9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:02:23, skipping insertion in model container [2019-11-07 02:02:23,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:14" (2/3) ... [2019-11-07 02:02:23,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693bef9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:02:23, skipping insertion in model container [2019-11-07 02:02:23,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:02:23" (3/3) ... [2019-11-07 02:02:23,642 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label55.c [2019-11-07 02:02:23,653 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 02:02:23,662 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 02:02:23,674 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 02:02:23,712 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 02:02:23,712 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 02:02:23,712 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 02:02:23,712 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 02:02:23,713 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 02:02:23,713 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 02:02:23,713 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 02:02:23,713 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 02:02:23,750 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-11-07 02:02:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 02:02:23,758 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:02:23,759 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:02:23,761 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:02:23,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:02:23,766 INFO L82 PathProgramCache]: Analyzing trace with hash 648053869, now seen corresponding path program 1 times [2019-11-07 02:02:23,776 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:02:23,776 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353865025] [2019-11-07 02:02:23,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:02:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:02:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:02:24,053 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353865025] [2019-11-07 02:02:24,054 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:02:24,054 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 02:02:24,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019311920] [2019-11-07 02:02:24,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 02:02:24,061 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:02:24,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 02:02:24,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 02:02:24,078 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-11-07 02:02:28,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:02:28,101 INFO L93 Difference]: Finished difference Result 953 states and 1850 transitions. [2019-11-07 02:02:28,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 02:02:28,103 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-07 02:02:28,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:02:28,178 INFO L225 Difference]: With dead ends: 953 [2019-11-07 02:02:28,178 INFO L226 Difference]: Without dead ends: 702 [2019-11-07 02:02:28,189 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 02:02:28,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-11-07 02:02:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 469. [2019-11-07 02:02:28,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2019-11-07 02:02:28,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2019-11-07 02:02:28,276 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2019-11-07 02:02:28,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:02:28,276 INFO L462 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2019-11-07 02:02:28,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 02:02:28,277 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2019-11-07 02:02:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 02:02:28,278 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:02:28,279 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:02:28,279 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:02:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:02:28,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1940410299, now seen corresponding path program 1 times [2019-11-07 02:02:28,280 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:02:28,280 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580343921] [2019-11-07 02:02:28,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:02:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:02:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:02:28,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580343921] [2019-11-07 02:02:28,393 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:02:28,394 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 02:02:28,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040548839] [2019-11-07 02:02:28,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 02:02:28,399 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:02:28,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 02:02:28,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 02:02:28,400 INFO L87 Difference]: Start difference. First operand 469 states and 744 transitions. Second operand 4 states. [2019-11-07 02:02:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:02:33,401 INFO L93 Difference]: Finished difference Result 1855 states and 2982 transitions. [2019-11-07 02:02:33,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 02:02:33,402 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-11-07 02:02:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:02:33,411 INFO L225 Difference]: With dead ends: 1855 [2019-11-07 02:02:33,412 INFO L226 Difference]: Without dead ends: 1391 [2019-11-07 02:02:33,414 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 02:02:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2019-11-07 02:02:33,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1376. [2019-11-07 02:02:33,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1376 states. [2019-11-07 02:02:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1950 transitions. [2019-11-07 02:02:33,482 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1950 transitions. Word has length 21 [2019-11-07 02:02:33,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:02:33,482 INFO L462 AbstractCegarLoop]: Abstraction has 1376 states and 1950 transitions. [2019-11-07 02:02:33,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 02:02:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1950 transitions. [2019-11-07 02:02:33,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-07 02:02:33,485 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:02:33,485 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:02:33,485 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:02:33,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:02:33,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1601736320, now seen corresponding path program 1 times [2019-11-07 02:02:33,486 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:02:33,486 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954691741] [2019-11-07 02:02:33,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:02:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:02:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 02:02:33,621 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954691741] [2019-11-07 02:02:33,621 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:02:33,621 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 02:02:33,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522244879] [2019-11-07 02:02:33,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 02:02:33,623 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:02:33,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 02:02:33,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-07 02:02:33,623 INFO L87 Difference]: Start difference. First operand 1376 states and 1950 transitions. Second operand 5 states. [2019-11-07 02:02:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:02:37,656 INFO L93 Difference]: Finished difference Result 3939 states and 5736 transitions. [2019-11-07 02:02:37,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 02:02:37,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2019-11-07 02:02:37,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:02:37,682 INFO L225 Difference]: With dead ends: 3939 [2019-11-07 02:02:37,682 INFO L226 Difference]: Without dead ends: 2568 [2019-11-07 02:02:37,686 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 02:02:37,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2019-11-07 02:02:37,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 1878. [2019-11-07 02:02:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1878 states. [2019-11-07 02:02:37,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 2582 transitions. [2019-11-07 02:02:37,786 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 2582 transitions. Word has length 67 [2019-11-07 02:02:37,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:02:37,788 INFO L462 AbstractCegarLoop]: Abstraction has 1878 states and 2582 transitions. [2019-11-07 02:02:37,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 02:02:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 2582 transitions. [2019-11-07 02:02:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-07 02:02:37,801 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:02:37,801 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:02:37,801 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:02:37,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:02:37,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1394231609, now seen corresponding path program 1 times [2019-11-07 02:02:37,802 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:02:37,802 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958840726] [2019-11-07 02:02:37,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:02:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:02:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 02:02:38,194 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958840726] [2019-11-07 02:02:38,194 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572324480] [2019-11-07 02:02:38,194 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 [2019-11-07 02:02:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:02:38,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 02:02:38,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 02:02:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 02:02:38,447 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 02:02:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 02:02:38,552 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [357310047] [2019-11-07 02:02:38,590 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2019-11-07 02:02:38,590 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 02:02:38,597 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 02:02:38,603 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 02:02:38,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 02:02:38,705 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2019-11-07 02:02:39,020 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 51 [2019-11-07 02:02:39,619 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 11486 conjuctions. This might take some time... [2019-11-07 02:02:39,765 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 51 [2019-11-07 02:02:40,151 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 11486 conjuctions. This might take some time... [2019-11-07 02:02:40,258 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-11-07 02:02:40,276 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-11-07 02:02:41,554 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 80 for LOIs [2019-11-07 02:02:41,563 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 53