java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:41:14,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:41:14,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:41:14,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:41:14,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:41:14,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:41:14,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:41:14,835 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 01:41:14,851 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:41:14,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:41:14,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:41:14,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:41:14,853 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:41:14,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:41:14,853 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:41:14,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:41:14,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:41:14,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:41:14,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:41:14,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:41:14,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:41:14,855 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:41:14,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:41:14,855 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:41:14,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:41:14,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:41:14,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:41:14,856 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:41:14,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:41:14,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:41:14,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:41:14,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:41:14,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:41:14,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:41:14,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:41:14,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:41:14,858 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 01:41:15,146 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:41:15,167 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:41:15,171 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:41:15,173 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:41:15,173 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:41:15,174 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label06.c [2019-10-15 01:41:15,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cf35dd8f/053954ced2c8452690bb4a6bd66393c6/FLAG64685bed1 [2019-10-15 01:41:15,836 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:41:15,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label06.c [2019-10-15 01:41:15,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cf35dd8f/053954ced2c8452690bb4a6bd66393c6/FLAG64685bed1 [2019-10-15 01:41:16,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cf35dd8f/053954ced2c8452690bb4a6bd66393c6 [2019-10-15 01:41:16,103 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:41:16,105 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:41:16,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:16,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:41:16,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:41:16,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:16" (1/1) ... [2019-10-15 01:41:16,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f2b11d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:16, skipping insertion in model container [2019-10-15 01:41:16,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:16" (1/1) ... [2019-10-15 01:41:16,123 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:41:16,167 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:41:16,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:16,676 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:41:16,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:16,847 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:41:16,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:16 WrapperNode [2019-10-15 01:41:16,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:16,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:41:16,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:41:16,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:41:16,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:16" (1/1) ... [2019-10-15 01:41:16,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:16" (1/1) ... [2019-10-15 01:41:16,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:16" (1/1) ... [2019-10-15 01:41:16,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:16" (1/1) ... [2019-10-15 01:41:16,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:16" (1/1) ... [2019-10-15 01:41:16,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:16" (1/1) ... [2019-10-15 01:41:17,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:16" (1/1) ... [2019-10-15 01:41:17,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:41:17,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:41:17,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:41:17,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:41:17,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:16" (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 01:41:17,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:41:17,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:41:17,078 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:41:17,078 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:41:17,079 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:41:17,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:41:17,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:41:17,079 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:41:17,079 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:41:17,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:41:17,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:41:18,952 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:41:18,953 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:41:18,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:18 BoogieIcfgContainer [2019-10-15 01:41:18,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:41:18,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:41:18,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:41:18,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:41:18,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:41:16" (1/3) ... [2019-10-15 01:41:18,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@421bf177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:18, skipping insertion in model container [2019-10-15 01:41:18,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:16" (2/3) ... [2019-10-15 01:41:18,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@421bf177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:18, skipping insertion in model container [2019-10-15 01:41:18,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:18" (3/3) ... [2019-10-15 01:41:18,968 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label06.c [2019-10-15 01:41:18,977 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:41:18,986 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:41:18,997 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:41:19,026 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:41:19,026 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:41:19,026 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:41:19,026 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:41:19,027 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:41:19,027 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:41:19,027 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:41:19,027 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:41:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:41:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:41:19,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:19,073 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:19,075 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:19,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:19,079 INFO L82 PathProgramCache]: Analyzing trace with hash -219355337, now seen corresponding path program 1 times [2019-10-15 01:41:19,088 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:19,088 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404580474] [2019-10-15 01:41:19,089 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:19,089 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:19,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:19,506 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 01:41:19,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404580474] [2019-10-15 01:41:19,508 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:19,508 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:19,509 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978208811] [2019-10-15 01:41:19,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:19,514 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:19,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:19,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:19,531 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:41:20,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:20,057 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:41:20,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:20,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:41:20,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:20,082 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:41:20,083 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:41:20,089 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 01:41:20,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:41:20,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:41:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:41:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:41:20,193 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:41:20,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:20,195 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:41:20,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:20,196 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:41:20,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:41:20,207 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:20,208 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:20,208 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:20,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:20,210 INFO L82 PathProgramCache]: Analyzing trace with hash -701890116, now seen corresponding path program 1 times [2019-10-15 01:41:20,210 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:20,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668452449] [2019-10-15 01:41:20,211 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:20,211 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:20,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:41:20,378 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668452449] [2019-10-15 01:41:20,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742605454] [2019-10-15 01:41:20,379 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 01:41:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:20,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:20,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:20,559 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:20,598 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:41:20,599 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-15 01:41:20,599 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732476359] [2019-10-15 01:41:20,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:20,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:20,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:20,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:41:20,602 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-15 01:41:21,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:21,043 INFO L93 Difference]: Finished difference Result 345 states and 626 transitions. [2019-10-15 01:41:21,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:21,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 01:41:21,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:21,052 INFO L225 Difference]: With dead ends: 345 [2019-10-15 01:41:21,053 INFO L226 Difference]: Without dead ends: 343 [2019-10-15 01:41:21,055 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:41:21,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-15 01:41:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 259. [2019-10-15 01:41:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-10-15 01:41:21,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 475 transitions. [2019-10-15 01:41:21,103 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 475 transitions. Word has length 94 [2019-10-15 01:41:21,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:21,104 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 475 transitions. [2019-10-15 01:41:21,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 475 transitions. [2019-10-15 01:41:21,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 01:41:21,108 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:21,109 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:21,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:41:21,310 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:21,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:21,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1307293793, now seen corresponding path program 1 times [2019-10-15 01:41:21,311 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:21,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898187690] [2019-10-15 01:41:21,311 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:21,312 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:21,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:21,448 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898187690] [2019-10-15 01:41:21,449 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:21,449 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:41:21,449 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982265235] [2019-10-15 01:41:21,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:41:21,450 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:21,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:41:21,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:41:21,451 INFO L87 Difference]: Start difference. First operand 259 states and 475 transitions. Second operand 6 states. [2019-10-15 01:41:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:22,081 INFO L93 Difference]: Finished difference Result 797 states and 1529 transitions. [2019-10-15 01:41:22,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:41:22,086 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-15 01:41:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:22,095 INFO L225 Difference]: With dead ends: 797 [2019-10-15 01:41:22,096 INFO L226 Difference]: Without dead ends: 543 [2019-10-15 01:41:22,098 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 01:41:22,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2019-10-15 01:41:22,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 527. [2019-10-15 01:41:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2019-10-15 01:41:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 944 transitions. [2019-10-15 01:41:22,151 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 944 transitions. Word has length 108 [2019-10-15 01:41:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:22,151 INFO L462 AbstractCegarLoop]: Abstraction has 527 states and 944 transitions. [2019-10-15 01:41:22,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:41:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 944 transitions. [2019-10-15 01:41:22,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-15 01:41:22,154 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:22,154 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:22,155 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:22,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:22,155 INFO L82 PathProgramCache]: Analyzing trace with hash -852382425, now seen corresponding path program 1 times [2019-10-15 01:41:22,155 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:22,155 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236695222] [2019-10-15 01:41:22,156 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:22,156 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:22,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:22,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236695222] [2019-10-15 01:41:22,247 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:22,247 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:22,247 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881415753] [2019-10-15 01:41:22,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:22,248 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:22,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:22,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:22,248 INFO L87 Difference]: Start difference. First operand 527 states and 944 transitions. Second operand 3 states. [2019-10-15 01:41:22,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:22,621 INFO L93 Difference]: Finished difference Result 1049 states and 1898 transitions. [2019-10-15 01:41:22,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:22,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2019-10-15 01:41:22,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:22,630 INFO L225 Difference]: With dead ends: 1049 [2019-10-15 01:41:22,631 INFO L226 Difference]: Without dead ends: 527 [2019-10-15 01:41:22,635 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 01:41:22,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2019-10-15 01:41:22,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 441. [2019-10-15 01:41:22,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-10-15 01:41:22,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 721 transitions. [2019-10-15 01:41:22,657 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 721 transitions. Word has length 112 [2019-10-15 01:41:22,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:22,658 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 721 transitions. [2019-10-15 01:41:22,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:22,658 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 721 transitions. [2019-10-15 01:41:22,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:41:22,660 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:22,661 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:22,661 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:22,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:22,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1860599908, now seen corresponding path program 1 times [2019-10-15 01:41:22,662 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:22,662 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398577500] [2019-10-15 01:41:22,662 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:22,662 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:22,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:22,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398577500] [2019-10-15 01:41:22,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910313602] [2019-10-15 01:41:22,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:41:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:22,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:22,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:22,990 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:23,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1340507652] [2019-10-15 01:41:23,103 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:23,103 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:23,109 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:23,117 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:23,118 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:23,422 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2019-10-15 01:41:24,322 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 137 [2019-10-15 01:41:24,541 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 136 [2019-10-15 01:41:25,942 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 86 for LOIs [2019-10-15 01:41:34,216 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2019-10-15 01:41:34,299 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 8368 conjuctions. This might take some time... [2019-10-15 01:41:34,569 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 61 [2019-10-15 01:41:35,308 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 26488 conjuctions. This might take some time... [2019-10-15 01:41:36,138 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 61 [2019-10-15 01:41:36,586 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 26488 conjuctions. This might take some time... [2019-10-15 01:41:37,520 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:41:37,534 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:41:37,784 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2019-10-15 01:41:38,016 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:41:38,429 WARN L191 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:41:38,887 WARN L191 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2019-10-15 01:41:39,351 WARN L191 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 85 [2019-10-15 01:41:39,761 WARN L191 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:41:40,109 WARN L191 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2019-10-15 01:41:40,515 WARN L191 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2019-10-15 01:41:40,861 WARN L191 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2019-10-15 01:41:41,712 WARN L191 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 88 [2019-10-15 01:41:41,943 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-10-15 01:41:44,740 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:41:44,740 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 12] total 23 [2019-10-15 01:41:44,740 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694562323] [2019-10-15 01:41:44,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:41:44,742 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:44,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:41:44,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:41:44,743 INFO L87 Difference]: Start difference. First operand 441 states and 721 transitions. Second operand 23 states. [2019-10-15 01:41:45,048 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:41:45,425 WARN L191 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 93 [2019-10-15 01:41:45,824 WARN L191 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 99 [2019-10-15 01:41:46,259 WARN L191 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 96 [2019-10-15 01:41:46,608 WARN L191 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:41:46,953 WARN L191 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:41:48,592 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2019-10-15 01:41:48,930 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74