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_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:40:20,690 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:40:20,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:40:20,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:40:20,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:40:20,762 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 01:40:20,780 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:40:20,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:40:20,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:40:20,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:40:20,786 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:40:20,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:40:20,786 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:40:20,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:40:20,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:40:20,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:40:20,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:40:20,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:40:20,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:40:20,788 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:40:20,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:40:20,788 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:40:20,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:40:20,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:40:20,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:40:20,789 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:40:20,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:40:20,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:40:20,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:40:20,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:40:20,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:40:20,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:40:20,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:40:20,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:40:20,791 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 01:40:21,109 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:40:21,126 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:40:21,130 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:40:21,132 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:40:21,132 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:40:21,133 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label40.c [2019-10-15 01:40:21,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f2915cf5/59a13fb8f71842f79771c839e171359f/FLAG5240ca724 [2019-10-15 01:40:21,798 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:40:21,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label40.c [2019-10-15 01:40:21,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f2915cf5/59a13fb8f71842f79771c839e171359f/FLAG5240ca724 [2019-10-15 01:40:22,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f2915cf5/59a13fb8f71842f79771c839e171359f [2019-10-15 01:40:22,056 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:40:22,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:40:22,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:40:22,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:40:22,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:40:22,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:40:22" (1/1) ... [2019-10-15 01:40:22,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c679016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:22, skipping insertion in model container [2019-10-15 01:40:22,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:40:22" (1/1) ... [2019-10-15 01:40:22,074 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:40:22,129 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:40:22,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:40:22,585 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:40:22,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:40:22,844 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:40:22,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:22 WrapperNode [2019-10-15 01:40:22,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:40:22,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:40:22,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:40:22,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:40:22,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:22" (1/1) ... [2019-10-15 01:40:22,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:22" (1/1) ... [2019-10-15 01:40:22,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:22" (1/1) ... [2019-10-15 01:40:22,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:22" (1/1) ... [2019-10-15 01:40:22,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:22" (1/1) ... [2019-10-15 01:40:22,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:22" (1/1) ... [2019-10-15 01:40:22,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:22" (1/1) ... [2019-10-15 01:40:23,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:40:23,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:40:23,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:40:23,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:40:23,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:22" (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 01:40:23,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:40:23,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:40:23,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:40:23,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:40:23,077 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:40:23,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:40:23,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:40:23,078 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:40:23,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:40:23,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:40:23,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:40:25,052 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:40:25,052 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:40:25,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:40:25 BoogieIcfgContainer [2019-10-15 01:40:25,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:40:25,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:40:25,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:40:25,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:40:25,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:40:22" (1/3) ... [2019-10-15 01:40:25,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104025fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:40:25, skipping insertion in model container [2019-10-15 01:40:25,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:22" (2/3) ... [2019-10-15 01:40:25,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104025fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:40:25, skipping insertion in model container [2019-10-15 01:40:25,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:40:25" (3/3) ... [2019-10-15 01:40:25,064 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label40.c [2019-10-15 01:40:25,074 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:40:25,083 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:40:25,095 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:40:25,124 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:40:25,125 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:40:25,125 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:40:25,125 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:40:25,125 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:40:25,125 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:40:25,125 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:40:25,126 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:40:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-10-15 01:40:25,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-15 01:40:25,176 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:40:25,177 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 01:40:25,179 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:40:25,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:40:25,187 INFO L82 PathProgramCache]: Analyzing trace with hash 826812193, now seen corresponding path program 1 times [2019-10-15 01:40:25,197 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:40:25,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812929471] [2019-10-15 01:40:25,198 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:40:25,198 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:40:25,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:40:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:40:25,650 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 01:40:25,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812929471] [2019-10-15 01:40:25,652 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:40:25,652 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:40:25,653 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820722742] [2019-10-15 01:40:25,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:40:25,660 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:40:25,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:40:25,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:40:25,678 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-10-15 01:40:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:40:26,243 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-10-15 01:40:26,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:40:26,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-10-15 01:40:26,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:40:26,269 INFO L225 Difference]: With dead ends: 246 [2019-10-15 01:40:26,269 INFO L226 Difference]: Without dead ends: 157 [2019-10-15 01:40:26,275 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 01:40:26,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-15 01:40:26,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-10-15 01:40:26,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-15 01:40:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 285 transitions. [2019-10-15 01:40:26,344 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 285 transitions. Word has length 77 [2019-10-15 01:40:26,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:40:26,345 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 285 transitions. [2019-10-15 01:40:26,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:40:26,346 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 285 transitions. [2019-10-15 01:40:26,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:40:26,350 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:40:26,351 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:40:26,351 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:40:26,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:40:26,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1022504040, now seen corresponding path program 1 times [2019-10-15 01:40:26,352 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:40:26,352 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316063376] [2019-10-15 01:40:26,352 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:40:26,353 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:40:26,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:40:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:40:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:40:26,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316063376] [2019-10-15 01:40:26,480 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:40:26,480 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:40:26,480 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904891401] [2019-10-15 01:40:26,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:40:26,483 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:40:26,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:40:26,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:40:26,483 INFO L87 Difference]: Start difference. First operand 157 states and 285 transitions. Second operand 5 states. [2019-10-15 01:40:27,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:40:27,089 INFO L93 Difference]: Finished difference Result 479 states and 892 transitions. [2019-10-15 01:40:27,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:40:27,089 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2019-10-15 01:40:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:40:27,095 INFO L225 Difference]: With dead ends: 479 [2019-10-15 01:40:27,095 INFO L226 Difference]: Without dead ends: 327 [2019-10-15 01:40:27,098 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:40:27,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-10-15 01:40:27,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 317. [2019-10-15 01:40:27,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-10-15 01:40:27,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 546 transitions. [2019-10-15 01:40:27,145 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 546 transitions. Word has length 86 [2019-10-15 01:40:27,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:40:27,145 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 546 transitions. [2019-10-15 01:40:27,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:40:27,145 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 546 transitions. [2019-10-15 01:40:27,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-15 01:40:27,150 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:40:27,150 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:40:27,151 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:40:27,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:40:27,151 INFO L82 PathProgramCache]: Analyzing trace with hash -498209111, now seen corresponding path program 1 times [2019-10-15 01:40:27,151 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:40:27,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762107777] [2019-10-15 01:40:27,152 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:40:27,152 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:40:27,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:40:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:40:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:40:27,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762107777] [2019-10-15 01:40:27,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775352296] [2019-10-15 01:40:27,299 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 01:40:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:40:27,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:40:27,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:40:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:40:27,534 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:40:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:40:27,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1654367313] [2019-10-15 01:40:27,696 INFO L162 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-10-15 01:40:27,697 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:40:27,704 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:40:27,713 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:40:27,714 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:40:28,099 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs [2019-10-15 01:40:29,221 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 182 [2019-10-15 01:40:30,375 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 141 for LOIs [2019-10-15 01:40:30,609 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 143 [2019-10-15 01:40:31,221 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-10-15 01:40:31,333 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-10-15 01:40:31,456 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2019-10-15 01:40:31,766 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 149 [2019-10-15 01:40:31,901 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:40:32,042 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2019-10-15 01:40:32,354 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:40:32,496 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:40:32,786 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:40:32,904 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:40:33,041 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-10-15 01:40:33,237 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:40:33,353 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:40:33,461 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2019-10-15 01:40:33,989 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 148 [2019-10-15 01:40:34,097 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:40:34,403 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:40:34,526 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:40:34,677 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-15 01:40:34,869 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:40:35,059 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2019-10-15 01:40:35,643 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 148 [2019-10-15 01:40:35,806 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:40:35,933 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-15 01:40:36,110 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:40:37,552 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 148 [2019-10-15 01:40:38,507 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:40:38,630 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:40:38,944 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 148 [2019-10-15 01:40:39,068 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:40:39,617 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 147 [2019-10-15 01:40:51,320 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-10-15 01:40:51,907 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 127764 conjuctions. This might take some time...