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_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:41:49,001 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:41:49,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:41:49,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:41:49,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:41:49,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:41:49,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:41:49,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:41:49,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:41:49,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:41:49,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:41:49,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:41:49,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:41:49,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:41:49,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:41:49,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:41:49,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:41:49,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:41:49,082 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 01:41:49,095 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:41:49,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:41:49,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:41:49,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:41:49,097 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:41:49,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:41:49,098 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:41:49,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:41:49,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:41:49,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:41:49,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:41:49,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:41:49,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:41:49,099 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:41:49,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:41:49,100 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:41:49,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:41:49,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:41:49,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:41:49,100 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:41:49,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:41:49,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:41:49,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:41:49,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:41:49,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:41:49,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:41:49,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:41:49,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:41:49,102 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 01:41:49,395 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:41:49,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:41:49,421 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:41:49,423 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:41:49,423 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:41:49,424 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label22.c [2019-10-15 01:41:49,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bce175c8/d835bf8a9dca4b4a8970f03cfdca001a/FLAG20d36733a [2019-10-15 01:41:50,075 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:41:50,076 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label22.c [2019-10-15 01:41:50,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bce175c8/d835bf8a9dca4b4a8970f03cfdca001a/FLAG20d36733a [2019-10-15 01:41:50,370 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bce175c8/d835bf8a9dca4b4a8970f03cfdca001a [2019-10-15 01:41:50,380 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:41:50,382 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:41:50,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:50,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:41:50,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:41:50,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:50" (1/1) ... [2019-10-15 01:41:50,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@760969a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:50, skipping insertion in model container [2019-10-15 01:41:50,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:50" (1/1) ... [2019-10-15 01:41:50,397 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:41:50,458 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:41:50,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:50,987 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:41:51,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:51,128 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:41:51,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:51 WrapperNode [2019-10-15 01:41:51,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:51,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:41:51,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:41:51,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:41:51,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:51" (1/1) ... [2019-10-15 01:41:51,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:51" (1/1) ... [2019-10-15 01:41:51,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:51" (1/1) ... [2019-10-15 01:41:51,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:51" (1/1) ... [2019-10-15 01:41:51,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:51" (1/1) ... [2019-10-15 01:41:51,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:51" (1/1) ... [2019-10-15 01:41:51,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:51" (1/1) ... [2019-10-15 01:41:51,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:41:51,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:41:51,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:41:51,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:41:51,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:51" (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 01:41:51,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:41:51,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:41:51,345 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:41:51,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:41:51,346 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:41:51,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:41:51,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:41:51,348 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:41:51,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:41:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:41:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:41:53,754 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:41:53,754 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:41:53,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:53 BoogieIcfgContainer [2019-10-15 01:41:53,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:41:53,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:41:53,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:41:53,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:41:53,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:41:50" (1/3) ... [2019-10-15 01:41:53,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e6dee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:53, skipping insertion in model container [2019-10-15 01:41:53,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:51" (2/3) ... [2019-10-15 01:41:53,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e6dee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:53, skipping insertion in model container [2019-10-15 01:41:53,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:53" (3/3) ... [2019-10-15 01:41:53,763 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label22.c [2019-10-15 01:41:53,773 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:41:53,781 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:41:53,793 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:41:53,818 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:41:53,819 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:41:53,819 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:41:53,819 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:41:53,820 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:41:53,820 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:41:53,820 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:41:53,821 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:41:53,842 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:41:53,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:41:53,855 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:53,856 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 01:41:53,859 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:53,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:53,865 INFO L82 PathProgramCache]: Analyzing trace with hash -219366345, now seen corresponding path program 1 times [2019-10-15 01:41:53,875 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:53,875 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093998514] [2019-10-15 01:41:53,875 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:53,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:53,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:54,251 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 01:41:54,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093998514] [2019-10-15 01:41:54,253 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:54,253 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:54,254 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18351854] [2019-10-15 01:41:54,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:54,259 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:54,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:54,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:54,275 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:41:54,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:54,962 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:41:54,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:54,964 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:41:54,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:54,986 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:41:54,986 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:41:54,993 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 01:41:55,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:41:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:41:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:41:55,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 317 transitions. [2019-10-15 01:41:55,068 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 317 transitions. Word has length 86 [2019-10-15 01:41:55,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:55,069 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 317 transitions. [2019-10-15 01:41:55,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 317 transitions. [2019-10-15 01:41:55,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 01:41:55,079 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:55,080 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-15 01:41:55,080 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:55,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:55,080 INFO L82 PathProgramCache]: Analyzing trace with hash 656210794, now seen corresponding path program 1 times [2019-10-15 01:41:55,081 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:55,081 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746084938] [2019-10-15 01:41:55,081 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:55,082 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:55,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:55,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746084938] [2019-10-15 01:41:55,251 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:55,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:41:55,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410436564] [2019-10-15 01:41:55,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:41:55,254 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:55,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:41:55,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:41:55,255 INFO L87 Difference]: Start difference. First operand 175 states and 317 transitions. Second operand 6 states. [2019-10-15 01:41:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:55,941 INFO L93 Difference]: Finished difference Result 531 states and 984 transitions. [2019-10-15 01:41:55,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:41:55,943 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-10-15 01:41:55,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:55,949 INFO L225 Difference]: With dead ends: 531 [2019-10-15 01:41:55,949 INFO L226 Difference]: Without dead ends: 361 [2019-10-15 01:41:55,953 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 01:41:55,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2019-10-15 01:41:56,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 355. [2019-10-15 01:41:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-10-15 01:41:56,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 632 transitions. [2019-10-15 01:41:56,019 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 632 transitions. Word has length 104 [2019-10-15 01:41:56,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:56,024 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 632 transitions. [2019-10-15 01:41:56,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:41:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 632 transitions. [2019-10-15 01:41:56,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-15 01:41:56,033 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:56,033 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-10-15 01:41:56,034 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:56,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:56,035 INFO L82 PathProgramCache]: Analyzing trace with hash 633621345, now seen corresponding path program 1 times [2019-10-15 01:41:56,035 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:56,036 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767384915] [2019-10-15 01:41:56,036 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:56,036 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:56,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:56,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767384915] [2019-10-15 01:41:56,146 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:56,147 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:56,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813778560] [2019-10-15 01:41:56,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:56,149 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:56,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:56,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:56,153 INFO L87 Difference]: Start difference. First operand 355 states and 632 transitions. Second operand 3 states. [2019-10-15 01:41:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:56,590 INFO L93 Difference]: Finished difference Result 963 states and 1743 transitions. [2019-10-15 01:41:56,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:56,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2019-10-15 01:41:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:56,596 INFO L225 Difference]: With dead ends: 963 [2019-10-15 01:41:56,596 INFO L226 Difference]: Without dead ends: 613 [2019-10-15 01:41:56,599 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 01:41:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2019-10-15 01:41:56,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 613. [2019-10-15 01:41:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2019-10-15 01:41:56,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 981 transitions. [2019-10-15 01:41:56,654 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 981 transitions. Word has length 105 [2019-10-15 01:41:56,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:56,655 INFO L462 AbstractCegarLoop]: Abstraction has 613 states and 981 transitions. [2019-10-15 01:41:56,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:56,655 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 981 transitions. [2019-10-15 01:41:56,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-15 01:41:56,659 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:56,660 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1] [2019-10-15 01:41:56,660 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:56,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:56,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1660923829, now seen corresponding path program 1 times [2019-10-15 01:41:56,661 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:56,661 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354409208] [2019-10-15 01:41:56,661 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:56,662 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:56,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:56,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354409208] [2019-10-15 01:41:56,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913477168] [2019-10-15 01:41:56,745 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 01:41:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:56,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:41:56,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:41:56,996 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:41:57,131 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:41:57,132 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2019-10-15 01:41:57,132 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451238039] [2019-10-15 01:41:57,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:41:57,134 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:57,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:41:57,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:41:57,135 INFO L87 Difference]: Start difference. First operand 613 states and 981 transitions. Second operand 7 states. [2019-10-15 01:41:57,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:57,721 INFO L93 Difference]: Finished difference Result 1599 states and 2650 transitions. [2019-10-15 01:41:57,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:41:57,723 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2019-10-15 01:41:57,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:57,729 INFO L225 Difference]: With dead ends: 1599 [2019-10-15 01:41:57,729 INFO L226 Difference]: Without dead ends: 991 [2019-10-15 01:41:57,732 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 218 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:41:57,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2019-10-15 01:41:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 891. [2019-10-15 01:41:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2019-10-15 01:41:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1461 transitions. [2019-10-15 01:41:57,809 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1461 transitions. Word has length 113 [2019-10-15 01:41:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:57,811 INFO L462 AbstractCegarLoop]: Abstraction has 891 states and 1461 transitions. [2019-10-15 01:41:57,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:41:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1461 transitions. [2019-10-15 01:41:57,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-15 01:41:57,818 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:57,818 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 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] [2019-10-15 01:41:58,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:41:58,023 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1191499248, now seen corresponding path program 1 times [2019-10-15 01:41:58,024 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:58,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191521402] [2019-10-15 01:41:58,025 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:58,025 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:58,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:41:58,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191521402] [2019-10-15 01:41:58,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177141149] [2019-10-15 01:41:58,143 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 01:41:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:58,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:58,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:41:58,314 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:41:58,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [347929740] [2019-10-15 01:41:58,429 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:58,429 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:58,435 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:58,443 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:58,444 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:58,747 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:00,326 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 85 for LOIs [2019-10-15 01:42:02,955 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2019-10-15 01:42:03,030 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2019-10-15 01:42:03,125 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2019-10-15 01:42:03,227 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:03,244 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:03,468 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:03,758 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:04,508 WARN L191 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 99 [2019-10-15 01:42:04,794 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:42:05,067 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2019-10-15 01:42:05,302 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2019-10-15 01:42:05,564 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 69 [2019-10-15 01:42:05,822 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2019-10-15 01:42:06,127 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 74 [2019-10-15 01:42:06,399 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2019-10-15 01:42:09,456 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:42:09,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 22 [2019-10-15 01:42:09,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609408883] [2019-10-15 01:42:09,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-15 01:42:09,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:09,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-15 01:42:09,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:42:09,460 INFO L87 Difference]: Start difference. First operand 891 states and 1461 transitions. Second operand 13 states. [2019-10-15 01:42:09,789 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:10,231 WARN L191 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 94 [2019-10-15 01:42:10,824 WARN L191 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 98 [2019-10-15 01:42:11,480 WARN L191 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 95 [2019-10-15 01:42:11,851 WARN L191 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:42:12,218 WARN L191 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:42:12,649 WARN L191 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 76 [2019-10-15 01:42:13,130 WARN L191 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 93 [2019-10-15 01:42:13,378 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2019-10-15 01:42:13,653 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2019-10-15 01:42:13,959 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2019-10-15 01:42:15,259 WARN L191 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 97 [2019-10-15 01:42:17,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:17,392 INFO L93 Difference]: Finished difference Result 2334 states and 3933 transitions. [2019-10-15 01:42:17,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:42:17,393 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2019-10-15 01:42:17,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:17,408 INFO L225 Difference]: With dead ends: 2334 [2019-10-15 01:42:17,408 INFO L226 Difference]: Without dead ends: 1448 [2019-10-15 01:42:17,421 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 266 SyntacticMatches, 82 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 01:42:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2019-10-15 01:42:17,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1432. [2019-10-15 01:42:17,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1432 states. [2019-10-15 01:42:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2169 transitions. [2019-10-15 01:42:17,494 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2169 transitions. Word has length 121 [2019-10-15 01:42:17,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:17,495 INFO L462 AbstractCegarLoop]: Abstraction has 1432 states and 2169 transitions. [2019-10-15 01:42:17,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-15 01:42:17,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2169 transitions. [2019-10-15 01:42:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-15 01:42:17,504 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:17,504 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:17,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:17,723 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:17,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:17,724 INFO L82 PathProgramCache]: Analyzing trace with hash -27390142, now seen corresponding path program 1 times [2019-10-15 01:42:17,724 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:17,725 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342742265] [2019-10-15 01:42:17,725 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:17,725 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:17,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:42:17,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342742265] [2019-10-15 01:42:17,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630763370] [2019-10-15 01:42:17,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:17,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:17,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:42:17,998 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:42:18,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1189743897] [2019-10-15 01:42:18,075 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:18,075 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:18,076 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:18,076 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:18,076 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:18,203 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 85 for LOIs [2019-10-15 01:42:19,242 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 85 for LOIs [2019-10-15 01:42:21,077 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2019-10-15 01:42:21,134 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2019-10-15 01:42:21,215 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2019-10-15 01:42:21,294 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:21,309 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:21,560 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:21,851 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:22,324 WARN L191 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 94 [2019-10-15 01:42:22,630 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 74 [2019-10-15 01:42:22,903 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2019-10-15 01:42:23,160 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2019-10-15 01:42:23,434 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 69 [2019-10-15 01:42:23,685 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2019-10-15 01:42:24,456 WARN L191 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2019-10-15 01:42:24,793 WARN L191 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 73