/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/Problem01_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:34:35,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:34:35,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:34:35,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:34:35,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:34:35,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:34:35,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:34:35,330 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 01:34:35,345 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:34:35,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:34:35,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:34:35,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:34:35,347 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:34:35,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:34:35,347 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:34:35,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:34:35,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:34:35,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:34:35,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:34:35,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:34:35,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:34:35,349 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:34:35,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:34:35,349 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:34:35,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:34:35,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:34:35,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:34:35,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:34:35,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:34:35,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:34:35,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:34:35,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:34:35,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:34:35,351 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:34:35,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:34:35,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:34:35,352 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 01:34:35,685 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:34:35,707 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:34:35,711 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:34:35,712 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:34:35,713 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:34:35,713 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label17.c [2019-11-07 01:34:35,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2becae5f8/ed9e14fee8814a7fb3287ccad8ea044c/FLAGca064755c [2019-11-07 01:34:36,377 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:34:36,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label17.c [2019-11-07 01:34:36,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2becae5f8/ed9e14fee8814a7fb3287ccad8ea044c/FLAGca064755c [2019-11-07 01:34:36,685 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2becae5f8/ed9e14fee8814a7fb3287ccad8ea044c [2019-11-07 01:34:36,708 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:34:36,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:34:36,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:34:36,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:34:36,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:34:36,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:36" (1/1) ... [2019-11-07 01:34:36,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f9e48ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:36, skipping insertion in model container [2019-11-07 01:34:36,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:36" (1/1) ... [2019-11-07 01:34:36,759 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:34:36,870 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:34:37,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:34:37,471 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:34:37,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:34:37,605 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:34:37,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:37 WrapperNode [2019-11-07 01:34:37,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:34:37,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:34:37,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:34:37,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:34:37,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:37" (1/1) ... [2019-11-07 01:34:37,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:37" (1/1) ... [2019-11-07 01:34:37,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:37" (1/1) ... [2019-11-07 01:34:37,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:37" (1/1) ... [2019-11-07 01:34:37,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:37" (1/1) ... [2019-11-07 01:34:37,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:37" (1/1) ... [2019-11-07 01:34:37,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:37" (1/1) ... [2019-11-07 01:34:37,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:34:37,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:34:37,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:34:37,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:34:37,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:37" (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 01:34:37,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:34:37,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:34:37,789 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:34:37,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:34:37,790 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:34:37,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:34:37,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:34:37,791 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:34:37,791 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:34:37,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:34:37,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:34:39,717 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:34:39,718 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:34:39,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:34:39 BoogieIcfgContainer [2019-11-07 01:34:39,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:34:39,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:34:39,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:34:39,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:34:39,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:34:36" (1/3) ... [2019-11-07 01:34:39,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b311eec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:34:39, skipping insertion in model container [2019-11-07 01:34:39,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:37" (2/3) ... [2019-11-07 01:34:39,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b311eec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:34:39, skipping insertion in model container [2019-11-07 01:34:39,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:34:39" (3/3) ... [2019-11-07 01:34:39,728 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label17.c [2019-11-07 01:34:39,739 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:34:39,748 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:34:39,760 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:34:39,787 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:34:39,787 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:34:39,787 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:34:39,787 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:34:39,788 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:34:39,788 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:34:39,788 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:34:39,788 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:34:39,811 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-11-07 01:34:39,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-07 01:34:39,820 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:34:39,821 INFO L410 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] [2019-11-07 01:34:39,823 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:34:39,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:34:39,830 INFO L82 PathProgramCache]: Analyzing trace with hash 826822500, now seen corresponding path program 1 times [2019-11-07 01:34:39,839 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:34:39,840 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444585214] [2019-11-07 01:34:39,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:34:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:34:40,308 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 01:34:40,308 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444585214] [2019-11-07 01:34:40,310 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:34:40,310 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:34:40,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146169055] [2019-11-07 01:34:40,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:34:40,319 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:34:40,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:34:40,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:34:40,338 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-11-07 01:34:40,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:34:40,933 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-11-07 01:34:40,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:34:40,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-11-07 01:34:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:34:40,953 INFO L225 Difference]: With dead ends: 246 [2019-11-07 01:34:40,953 INFO L226 Difference]: Without dead ends: 157 [2019-11-07 01:34:40,957 INFO L630 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 [2019-11-07 01:34:40,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-07 01:34:41,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-11-07 01:34:41,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-07 01:34:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 291 transitions. [2019-11-07 01:34:41,063 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 291 transitions. Word has length 77 [2019-11-07 01:34:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:34:41,065 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 291 transitions. [2019-11-07 01:34:41,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:34:41,065 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 291 transitions. [2019-11-07 01:34:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 01:34:41,073 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:34:41,074 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 01:34:41,074 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:34:41,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:34:41,075 INFO L82 PathProgramCache]: Analyzing trace with hash 579797451, now seen corresponding path program 1 times [2019-11-07 01:34:41,075 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:34:41,076 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027924429] [2019-11-07 01:34:41,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:34:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:34:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:34:41,279 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027924429] [2019-11-07 01:34:41,280 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:34:41,280 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:34:41,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512206399] [2019-11-07 01:34:41,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:34:41,282 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:34:41,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:34:41,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:34:41,283 INFO L87 Difference]: Start difference. First operand 157 states and 291 transitions. Second operand 3 states. [2019-11-07 01:34:41,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:34:41,727 INFO L93 Difference]: Finished difference Result 459 states and 872 transitions. [2019-11-07 01:34:41,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:34:41,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-11-07 01:34:41,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:34:41,733 INFO L225 Difference]: With dead ends: 459 [2019-11-07 01:34:41,733 INFO L226 Difference]: Without dead ends: 307 [2019-11-07 01:34:41,735 INFO L630 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 [2019-11-07 01:34:41,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2019-11-07 01:34:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 232. [2019-11-07 01:34:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-11-07 01:34:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 412 transitions. [2019-11-07 01:34:41,757 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 412 transitions. Word has length 94 [2019-11-07 01:34:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:34:41,758 INFO L462 AbstractCegarLoop]: Abstraction has 232 states and 412 transitions. [2019-11-07 01:34:41,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:34:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 412 transitions. [2019-11-07 01:34:41,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-07 01:34:41,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:34:41,761 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:34:41,761 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:34:41,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:34:41,762 INFO L82 PathProgramCache]: Analyzing trace with hash -164893417, now seen corresponding path program 1 times [2019-11-07 01:34:41,762 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:34:41,762 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191466726] [2019-11-07 01:34:41,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:34:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:34:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:34:41,906 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191466726] [2019-11-07 01:34:41,906 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:34:41,906 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:34:41,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104275032] [2019-11-07 01:34:41,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:34:41,907 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:34:41,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:34:41,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:34:41,908 INFO L87 Difference]: Start difference. First operand 232 states and 412 transitions. Second operand 6 states. [2019-11-07 01:34:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:34:42,555 INFO L93 Difference]: Finished difference Result 635 states and 1150 transitions. [2019-11-07 01:34:42,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:34:42,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2019-11-07 01:34:42,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:34:42,561 INFO L225 Difference]: With dead ends: 635 [2019-11-07 01:34:42,562 INFO L226 Difference]: Without dead ends: 408 [2019-11-07 01:34:42,564 INFO L630 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 [2019-11-07 01:34:42,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2019-11-07 01:34:42,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 398. [2019-11-07 01:34:42,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2019-11-07 01:34:42,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 649 transitions. [2019-11-07 01:34:42,611 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 649 transitions. Word has length 120 [2019-11-07 01:34:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:34:42,612 INFO L462 AbstractCegarLoop]: Abstraction has 398 states and 649 transitions. [2019-11-07 01:34:42,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:34:42,612 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 649 transitions. [2019-11-07 01:34:42,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-07 01:34:42,625 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:34:42,625 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:34:42,626 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:34:42,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:34:42,626 INFO L82 PathProgramCache]: Analyzing trace with hash 901532996, now seen corresponding path program 1 times [2019-11-07 01:34:42,626 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:34:42,627 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596730154] [2019-11-07 01:34:42,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:34:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:34:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:34:42,767 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596730154] [2019-11-07 01:34:42,767 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849158060] [2019-11-07 01:34:42,767 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 01:34:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:34:42,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:34:42,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:34:43,019 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:34:43,019 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:34:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:34:43,155 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1845884790] [2019-11-07 01:34:43,188 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-11-07 01:34:43,188 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:34:43,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:34:43,203 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:34:43,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:34:43,364 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 100 for LOIs [2019-11-07 01:34:44,881 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 140 for LOIs [2019-11-07 01:34:45,283 WARN L191 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2019-11-07 01:34:45,655 WARN L191 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2019-11-07 01:34:46,180 WARN L191 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2019-11-07 01:34:46,543 WARN L191 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2019-11-07 01:34:47,368 WARN L191 SmtUtils]: Spent 674.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2019-11-07 01:34:47,903 WARN L191 SmtUtils]: Spent 532.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2019-11-07 01:34:48,487 WARN L191 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2019-11-07 01:34:49,350 WARN L191 SmtUtils]: Spent 860.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2019-11-07 01:34:50,261 WARN L191 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:34:50,855 WARN L191 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:34:53,087 WARN L191 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:34:53,621 WARN L191 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:34:54,469 WARN L191 SmtUtils]: Spent 580.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:34:55,004 WARN L191 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:34:55,887 WARN L191 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:34:56,534 WARN L191 SmtUtils]: Spent 645.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:34:58,802 WARN L191 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:34:59,395 WARN L191 SmtUtils]: Spent 591.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:00,153 WARN L191 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:00,823 WARN L191 SmtUtils]: Spent 667.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:03,971 WARN L191 SmtUtils]: Spent 1.00 s on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:04,664 WARN L191 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:05,751 WARN L191 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:06,302 WARN L191 SmtUtils]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:07,292 WARN L191 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:08,012 WARN L191 SmtUtils]: Spent 718.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:08,873 WARN L191 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:09,493 WARN L191 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:10,577 WARN L191 SmtUtils]: Spent 887.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:11,406 WARN L191 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:12,689 WARN L191 SmtUtils]: Spent 948.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:13,793 WARN L191 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:15,306 WARN L191 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:16,358 WARN L191 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:35:17,413 WARN L191 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2019-11-07 01:35:18,152 WARN L191 SmtUtils]: Spent 736.00 ms on a formula simplification that was a NOOP. DAG size: 210