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_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:39:15,113 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:39:15,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:39:15,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:39:15,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:39:15,180 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 01:39:15,203 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:39:15,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:39:15,205 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:39:15,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:39:15,205 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:39:15,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:39:15,206 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:39:15,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:39:15,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:39:15,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:39:15,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:39:15,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:39:15,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:39:15,208 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:39:15,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:39:15,209 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:39:15,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:39:15,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:39:15,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:39:15,209 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:39:15,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:39:15,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:39:15,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:39:15,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:39:15,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:39:15,211 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:39:15,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:39:15,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:39:15,211 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 01:39:15,549 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:39:15,562 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:39:15,565 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:39:15,567 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:39:15,567 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:39:15,568 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label08.c [2019-10-15 01:39:15,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/341c6d5f5/e9ec76fc8577476789ea7de5b57dd11e/FLAGda3dd20a2 [2019-10-15 01:39:16,175 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:39:16,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label08.c [2019-10-15 01:39:16,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/341c6d5f5/e9ec76fc8577476789ea7de5b57dd11e/FLAGda3dd20a2 [2019-10-15 01:39:16,471 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/341c6d5f5/e9ec76fc8577476789ea7de5b57dd11e [2019-10-15 01:39:16,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:39:16,485 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:39:16,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:39:16,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:39:16,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:39:16,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:39:16" (1/1) ... [2019-10-15 01:39:16,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d281660 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:16, skipping insertion in model container [2019-10-15 01:39:16,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:39:16" (1/1) ... [2019-10-15 01:39:16,501 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:39:16,550 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:39:17,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:39:17,045 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:39:17,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:39:17,186 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:39:17,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:17 WrapperNode [2019-10-15 01:39:17,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:39:17,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:39:17,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:39:17,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:39:17,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:17" (1/1) ... [2019-10-15 01:39:17,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:17" (1/1) ... [2019-10-15 01:39:17,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:17" (1/1) ... [2019-10-15 01:39:17,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:17" (1/1) ... [2019-10-15 01:39:17,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:17" (1/1) ... [2019-10-15 01:39:17,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:17" (1/1) ... [2019-10-15 01:39:17,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:17" (1/1) ... [2019-10-15 01:39:17,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:39:17,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:39:17,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:39:17,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:39:17,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:17" (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 01:39:17,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:39:17,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:39:17,393 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:39:17,393 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:39:17,393 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:39:17,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:39:17,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:39:17,394 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:39:17,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:39:17,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:39:17,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:39:19,241 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:39:19,242 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:39:19,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:39:19 BoogieIcfgContainer [2019-10-15 01:39:19,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:39:19,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:39:19,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:39:19,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:39:19,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:39:16" (1/3) ... [2019-10-15 01:39:19,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@247aa501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:39:19, skipping insertion in model container [2019-10-15 01:39:19,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:17" (2/3) ... [2019-10-15 01:39:19,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@247aa501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:39:19, skipping insertion in model container [2019-10-15 01:39:19,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:39:19" (3/3) ... [2019-10-15 01:39:19,252 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label08.c [2019-10-15 01:39:19,262 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:39:19,270 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:39:19,282 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:39:19,307 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:39:19,308 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:39:19,308 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:39:19,308 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:39:19,308 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:39:19,308 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:39:19,309 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:39:19,309 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:39:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-10-15 01:39:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-15 01:39:19,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:19,340 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] [2019-10-15 01:39:19,342 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:19,348 INFO L82 PathProgramCache]: Analyzing trace with hash 826821732, now seen corresponding path program 1 times [2019-10-15 01:39:19,357 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:19,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378572078] [2019-10-15 01:39:19,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:19,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:19,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:19,800 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 01:39:19,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378572078] [2019-10-15 01:39:19,802 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:39:19,802 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:39:19,803 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315607740] [2019-10-15 01:39:19,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:39:19,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:19,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:39:19,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:39:19,826 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-10-15 01:39:20,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:20,270 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-10-15 01:39:20,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:39:20,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-10-15 01:39:20,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:20,287 INFO L225 Difference]: With dead ends: 246 [2019-10-15 01:39:20,287 INFO L226 Difference]: Without dead ends: 157 [2019-10-15 01:39:20,291 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 01:39:20,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-15 01:39:20,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-10-15 01:39:20,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-15 01:39:20,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 273 transitions. [2019-10-15 01:39:20,354 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 273 transitions. Word has length 77 [2019-10-15 01:39:20,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:20,355 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 273 transitions. [2019-10-15 01:39:20,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:39:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 273 transitions. [2019-10-15 01:39:20,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-15 01:39:20,361 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:20,361 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:39:20,361 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:20,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:20,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1195664901, now seen corresponding path program 1 times [2019-10-15 01:39:20,362 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:20,363 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910010313] [2019-10-15 01:39:20,363 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:20,363 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:20,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:20,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910010313] [2019-10-15 01:39:20,476 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:39:20,476 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:39:20,476 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316018064] [2019-10-15 01:39:20,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:39:20,479 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:20,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:39:20,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:39:20,479 INFO L87 Difference]: Start difference. First operand 157 states and 273 transitions. Second operand 6 states. [2019-10-15 01:39:21,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:21,054 INFO L93 Difference]: Finished difference Result 479 states and 861 transitions. [2019-10-15 01:39:21,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:39:21,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2019-10-15 01:39:21,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:21,068 INFO L225 Difference]: With dead ends: 479 [2019-10-15 01:39:21,068 INFO L226 Difference]: Without dead ends: 327 [2019-10-15 01:39:21,071 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:39:21,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-10-15 01:39:21,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 315. [2019-10-15 01:39:21,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2019-10-15 01:39:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 544 transitions. [2019-10-15 01:39:21,116 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 544 transitions. Word has length 87 [2019-10-15 01:39:21,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:21,117 INFO L462 AbstractCegarLoop]: Abstraction has 315 states and 544 transitions. [2019-10-15 01:39:21,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:39:21,117 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 544 transitions. [2019-10-15 01:39:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-15 01:39:21,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:21,122 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:39:21,123 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:21,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2128686505, now seen corresponding path program 1 times [2019-10-15 01:39:21,123 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:21,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330341023] [2019-10-15 01:39:21,124 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:21,124 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:21,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:21,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330341023] [2019-10-15 01:39:21,325 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:39:21,325 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:39:21,326 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069895196] [2019-10-15 01:39:21,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:39:21,327 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:21,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:39:21,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:39:21,327 INFO L87 Difference]: Start difference. First operand 315 states and 544 transitions. Second operand 3 states. [2019-10-15 01:39:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:21,743 INFO L93 Difference]: Finished difference Result 852 states and 1501 transitions. [2019-10-15 01:39:21,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:39:21,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-10-15 01:39:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:21,749 INFO L225 Difference]: With dead ends: 852 [2019-10-15 01:39:21,750 INFO L226 Difference]: Without dead ends: 542 [2019-10-15 01:39:21,753 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 01:39:21,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2019-10-15 01:39:21,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2019-10-15 01:39:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2019-10-15 01:39:21,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 858 transitions. [2019-10-15 01:39:21,791 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 858 transitions. Word has length 88 [2019-10-15 01:39:21,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:21,792 INFO L462 AbstractCegarLoop]: Abstraction has 540 states and 858 transitions. [2019-10-15 01:39:21,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:39:21,792 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 858 transitions. [2019-10-15 01:39:21,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-15 01:39:21,800 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:21,800 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:39:21,800 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:21,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1060658396, now seen corresponding path program 1 times [2019-10-15 01:39:21,801 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:21,801 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441201688] [2019-10-15 01:39:21,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:21,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:21,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:21,916 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441201688] [2019-10-15 01:39:21,916 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644559992] [2019-10-15 01:39:21,917 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 01:39:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:22,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:39:22,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:39:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:22,114 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:39:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:22,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [298270966] [2019-10-15 01:39:22,223 INFO L162 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-10-15 01:39:22,224 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:39:22,231 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:39:22,239 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:39:22,240 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:39:22,598 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs [2019-10-15 01:39:24,957 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 141 for LOIs [2019-10-15 01:39:25,460 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-10-15 01:39:25,662 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2019-10-15 01:39:25,848 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 143 [2019-10-15 01:39:25,954 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-10-15 01:39:26,083 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2019-10-15 01:39:26,285 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:39:26,754 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:39:26,877 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:39:26,992 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-10-15 01:39:27,212 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:39:27,372 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:39:27,502 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2019-10-15 01:39:27,919 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 148 [2019-10-15 01:39:28,033 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:39:28,163 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2019-10-15 01:39:28,358 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 148 [2019-10-15 01:39:28,688 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:39:28,798 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:39:29,211 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 148 [2019-10-15 01:39:29,402 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-15 01:39:30,001 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 148 [2019-10-15 01:39:30,104 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:39:30,876 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2019-10-15 01:39:31,610 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:39:31,963 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 148 [2019-10-15 01:39:32,430 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2019-10-15 01:39:32,585 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 147 [2019-10-15 01:39:33,766 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 147 [2019-10-15 01:39:34,435 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 147 [2019-10-15 01:39:34,546 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-10-15 01:39:36,454 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 147 [2019-10-15 01:39:38,431 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 146 [2019-10-15 01:39:45,305 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2019-10-15 01:39:47,471 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 183804 conjuctions. This might take some time...