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_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:41:03,922 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:41:03,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:41:03,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:41:03,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:41:03,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:41:03,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:41:03,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:41:03,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:41:03,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:41:03,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:41:03,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:41:03,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:41:03,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:41:03,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:41:04,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:41:04,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:41:04,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:41:04,007 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 01:41:04,041 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:41:04,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:41:04,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:41:04,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:41:04,045 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:41:04,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:41:04,046 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:41:04,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:41:04,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:41:04,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:41:04,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:41:04,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:41:04,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:41:04,049 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:41:04,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:41:04,050 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:41:04,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:41:04,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:41:04,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:41:04,051 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:41:04,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:41:04,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:41:04,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:41:04,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:41:04,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:41:04,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:41:04,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:41:04,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:41:04,054 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 01:41:04,366 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:41:04,379 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:41:04,382 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:41:04,384 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:41:04,385 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:41:04,385 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label00.c [2019-10-15 01:41:04,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/090755f76/6c1aed3eef074851b9b81698640fd31e/FLAGb32210e8e [2019-10-15 01:41:05,104 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:41:05,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label00.c [2019-10-15 01:41:05,124 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/090755f76/6c1aed3eef074851b9b81698640fd31e/FLAGb32210e8e [2019-10-15 01:41:05,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/090755f76/6c1aed3eef074851b9b81698640fd31e [2019-10-15 01:41:05,367 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:41:05,369 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:41:05,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:05,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:41:05,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:41:05,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:05" (1/1) ... [2019-10-15 01:41:05,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f0f2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:05, skipping insertion in model container [2019-10-15 01:41:05,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:05" (1/1) ... [2019-10-15 01:41:05,390 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:41:05,454 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:41:05,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:05,982 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:41:06,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:06,182 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:41:06,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06 WrapperNode [2019-10-15 01:41:06,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:06,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:41:06,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:41:06,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:41:06,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (1/1) ... [2019-10-15 01:41:06,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (1/1) ... [2019-10-15 01:41:06,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (1/1) ... [2019-10-15 01:41:06,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (1/1) ... [2019-10-15 01:41:06,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (1/1) ... [2019-10-15 01:41:06,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (1/1) ... [2019-10-15 01:41:06,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (1/1) ... [2019-10-15 01:41:06,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:41:06,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:41:06,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:41:06,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:41:06,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (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 01:41:06,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:41:06,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:41:06,395 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:41:06,395 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:41:06,396 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:41:06,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:41:06,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:41:06,397 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:41:06,397 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:41:06,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:41:06,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:41:08,783 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:41:08,784 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:41:08,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:08 BoogieIcfgContainer [2019-10-15 01:41:08,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:41:08,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:41:08,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:41:08,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:41:08,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:41:05" (1/3) ... [2019-10-15 01:41:08,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd6cfd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:08, skipping insertion in model container [2019-10-15 01:41:08,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (2/3) ... [2019-10-15 01:41:08,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd6cfd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:08, skipping insertion in model container [2019-10-15 01:41:08,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:08" (3/3) ... [2019-10-15 01:41:08,797 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label00.c [2019-10-15 01:41:08,808 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:41:08,818 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:41:08,831 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:41:08,865 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:41:08,865 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:41:08,866 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:41:08,866 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:41:08,866 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:41:08,866 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:41:08,866 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:41:08,866 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:41:08,897 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:41:08,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:41:08,908 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:08,909 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 01:41:08,912 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:08,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:08,919 INFO L82 PathProgramCache]: Analyzing trace with hash -219361737, now seen corresponding path program 1 times [2019-10-15 01:41:08,929 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:08,930 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785624015] [2019-10-15 01:41:08,930 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:08,930 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:08,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:09,376 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 01:41:09,377 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785624015] [2019-10-15 01:41:09,378 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:09,378 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:09,379 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135253357] [2019-10-15 01:41:09,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:09,384 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:09,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:09,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:09,401 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:41:10,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:10,043 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:41:10,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:10,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:41:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:10,069 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:41:10,070 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:41:10,078 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 01:41:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:41:10,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:41:10,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:41:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-10-15 01:41:10,226 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-10-15 01:41:10,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:10,228 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-10-15 01:41:10,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:10,230 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-10-15 01:41:10,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-15 01:41:10,246 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:10,246 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:10,247 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:10,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:10,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1874057074, now seen corresponding path program 1 times [2019-10-15 01:41:10,248 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:10,248 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28282391] [2019-10-15 01:41:10,248 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:10,249 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:10,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:10,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28282391] [2019-10-15 01:41:10,447 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:10,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:41:10,448 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292728046] [2019-10-15 01:41:10,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:41:10,450 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:10,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:41:10,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:41:10,451 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-10-15 01:41:11,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:11,129 INFO L93 Difference]: Finished difference Result 547 states and 1064 transitions. [2019-10-15 01:41:11,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:41:11,129 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-10-15 01:41:11,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:11,135 INFO L225 Difference]: With dead ends: 547 [2019-10-15 01:41:11,136 INFO L226 Difference]: Without dead ends: 377 [2019-10-15 01:41:11,138 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:41:11,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-10-15 01:41:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 355. [2019-10-15 01:41:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-10-15 01:41:11,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 641 transitions. [2019-10-15 01:41:11,207 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 641 transitions. Word has length 101 [2019-10-15 01:41:11,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:11,207 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 641 transitions. [2019-10-15 01:41:11,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:41:11,207 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 641 transitions. [2019-10-15 01:41:11,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-15 01:41:11,210 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:11,210 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 01:41:11,210 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:11,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:11,211 INFO L82 PathProgramCache]: Analyzing trace with hash -852388825, now seen corresponding path program 1 times [2019-10-15 01:41:11,211 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:11,211 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042538912] [2019-10-15 01:41:11,212 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:11,212 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:11,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:11,335 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 01:41:11,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042538912] [2019-10-15 01:41:11,336 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:11,336 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:11,336 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414914500] [2019-10-15 01:41:11,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:11,337 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:11,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:11,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:11,338 INFO L87 Difference]: Start difference. First operand 355 states and 641 transitions. Second operand 3 states. [2019-10-15 01:41:11,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:11,799 INFO L93 Difference]: Finished difference Result 1051 states and 1977 transitions. [2019-10-15 01:41:11,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:11,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2019-10-15 01:41:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:11,805 INFO L225 Difference]: With dead ends: 1051 [2019-10-15 01:41:11,806 INFO L226 Difference]: Without dead ends: 701 [2019-10-15 01:41:11,809 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 01:41:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2019-10-15 01:41:11,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 701. [2019-10-15 01:41:11,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2019-10-15 01:41:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1226 transitions. [2019-10-15 01:41:11,861 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1226 transitions. Word has length 112 [2019-10-15 01:41:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:11,862 INFO L462 AbstractCegarLoop]: Abstraction has 701 states and 1226 transitions. [2019-10-15 01:41:11,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1226 transitions. [2019-10-15 01:41:11,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-15 01:41:11,866 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:11,866 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:11,867 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:11,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:11,870 INFO L82 PathProgramCache]: Analyzing trace with hash -634097502, now seen corresponding path program 1 times [2019-10-15 01:41:11,870 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:11,871 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254929326] [2019-10-15 01:41:11,871 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:11,871 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:11,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:41:12,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254929326] [2019-10-15 01:41:12,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360554994] [2019-10-15 01:41:12,047 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 01:41:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:12,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:12,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:12,308 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:12,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [780404787] [2019-10-15 01:41:12,495 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:12,495 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:12,504 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:12,516 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:12,517 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:12,797 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:41:15,187 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 86 for LOIs [2019-10-15 01:41:23,899 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2019-10-15 01:41:24,019 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 8896 conjuctions. This might take some time... [2019-10-15 01:41:24,411 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2019-10-15 01:41:24,646 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 14840 conjuctions. This might take some time... [2019-10-15 01:41:25,454 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2019-10-15 01:41:25,656 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 14840 conjuctions. This might take some time... [2019-10-15 01:41:26,453 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:41:26,467 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:41:26,743 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2019-10-15 01:41:26,993 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:41:27,291 WARN L191 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:41:27,700 WARN L191 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 77 [2019-10-15 01:41:28,203 WARN L191 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 87 [2019-10-15 01:41:28,482 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2019-10-15 01:41:28,739 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2019-10-15 01:41:28,999 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2019-10-15 01:41:29,785 WARN L191 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 91 [2019-10-15 01:41:30,642 WARN L191 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 90 [2019-10-15 01:41:30,888 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-10-15 01:41:35,495 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:41:35,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 12] total 22 [2019-10-15 01:41:35,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268365827] [2019-10-15 01:41:35,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:41:35,498 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:35,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:41:35,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:41:35,499 INFO L87 Difference]: Start difference. First operand 701 states and 1226 transitions. Second operand 22 states. [2019-10-15 01:41:35,809 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:41:36,206 WARN L191 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 93 [2019-10-15 01:41:36,587 WARN L191 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 99 [2019-10-15 01:41:37,039 WARN L191 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 94 [2019-10-15 01:41:37,408 WARN L191 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:41:37,760 WARN L191 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:41:37,984 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2019-10-15 01:41:38,220 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2019-10-15 01:41:41,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:41,222 INFO L93 Difference]: Finished difference Result 1583 states and 2851 transitions. [2019-10-15 01:41:41,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 01:41:41,225 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 150 [2019-10-15 01:41:41,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:41,232 INFO L225 Difference]: With dead ends: 1583 [2019-10-15 01:41:41,232 INFO L226 Difference]: Without dead ends: 887 [2019-10-15 01:41:41,237 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 323 SyntacticMatches, 121 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 01:41:41,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2019-10-15 01:41:41,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 868. [2019-10-15 01:41:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 868 states. [2019-10-15 01:41:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1353 transitions. [2019-10-15 01:41:41,293 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1353 transitions. Word has length 150 [2019-10-15 01:41:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:41,294 INFO L462 AbstractCegarLoop]: Abstraction has 868 states and 1353 transitions. [2019-10-15 01:41:41,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:41:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1353 transitions. [2019-10-15 01:41:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-15 01:41:41,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:41,298 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:41,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:41:41,504 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:41,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:41,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1238321958, now seen corresponding path program 1 times [2019-10-15 01:41:41,506 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:41,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514784275] [2019-10-15 01:41:41,507 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:41,507 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:41,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:41,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514784275] [2019-10-15 01:41:41,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853022579] [2019-10-15 01:41:41,695 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 01:41:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:41,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:41:41,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:41,866 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:41,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [47107154] [2019-10-15 01:41:41,953 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:41,954 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:41,956 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:41,956 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:41,956 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:42,089 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs