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/loop-lit/gr2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 13:43:04,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 13:43:04,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 13:43:04,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 13:43:04,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 13:43:04,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 13:43:04,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 13:43:04,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 13:43:04,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 13:43:04,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 13:43:04,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 13:43:04,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 13:43:04,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 13:43:04,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 13:43:04,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 13:43:04,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 13:43:04,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 13:43:04,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 13:43:04,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 13:43:04,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 13:43:04,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 13:43:04,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 13:43:04,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 13:43:04,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 13:43:04,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 13:43:04,327 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 13:43:04,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 13:43:04,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 13:43:04,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 13:43:04,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 13:43:04,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 13:43:04,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 13:43:04,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 13:43:04,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 13:43:04,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 13:43:04,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 13:43:04,334 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 [2019-10-07 13:43:04,347 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 13:43:04,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 13:43:04,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 13:43:04,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 13:43:04,349 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 13:43:04,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 13:43:04,349 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 13:43:04,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 13:43:04,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 13:43:04,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 13:43:04,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 13:43:04,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 13:43:04,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 13:43:04,351 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 13:43:04,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 13:43:04,351 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 13:43:04,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 13:43:04,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 13:43:04,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 13:43:04,352 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 13:43:04,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 13:43:04,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:43:04,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 13:43:04,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 13:43:04,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 13:43:04,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 13:43:04,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 13:43:04,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 13:43:04,354 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 [2019-10-07 13:43:04,620 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 13:43:04,636 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 13:43:04,639 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 13:43:04,641 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 13:43:04,641 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 13:43:04,642 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gr2006.i [2019-10-07 13:43:04,714 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2a4c801f/797244e5e59140ca8519cb07c1d2f1e5/FLAG850096ba6 [2019-10-07 13:43:05,159 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 13:43:05,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i [2019-10-07 13:43:05,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2a4c801f/797244e5e59140ca8519cb07c1d2f1e5/FLAG850096ba6 [2019-10-07 13:43:05,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2a4c801f/797244e5e59140ca8519cb07c1d2f1e5 [2019-10-07 13:43:05,549 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 13:43:05,551 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 13:43:05,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 13:43:05,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 13:43:05,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 13:43:05,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:43:05" (1/1) ... [2019-10-07 13:43:05,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7189696a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:43:05, skipping insertion in model container [2019-10-07 13:43:05,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:43:05" (1/1) ... [2019-10-07 13:43:05,567 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 13:43:05,583 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 13:43:05,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:43:05,765 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 13:43:05,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:43:05,798 INFO L192 MainTranslator]: Completed translation [2019-10-07 13:43:05,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:43:05 WrapperNode [2019-10-07 13:43:05,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 13:43:05,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 13:43:05,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 13:43:05,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 13:43:05,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:43:05" (1/1) ... [2019-10-07 13:43:05,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:43:05" (1/1) ... [2019-10-07 13:43:05,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:43:05" (1/1) ... [2019-10-07 13:43:05,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:43:05" (1/1) ... [2019-10-07 13:43:05,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:43:05" (1/1) ... [2019-10-07 13:43:05,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:43:05" (1/1) ... [2019-10-07 13:43:05,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:43:05" (1/1) ... [2019-10-07 13:43:05,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 13:43:05,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 13:43:05,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 13:43:05,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 13:43:05,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:43:05" (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 [2019-10-07 13:43:05,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 13:43:05,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 13:43:05,955 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-07 13:43:05,955 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 13:43:05,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 13:43:05,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-07 13:43:05,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-07 13:43:05,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 13:43:05,956 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 13:43:05,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 13:43:05,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 13:43:06,186 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 13:43:06,187 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 13:43:06,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:43:06 BoogieIcfgContainer [2019-10-07 13:43:06,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 13:43:06,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 13:43:06,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 13:43:06,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 13:43:06,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 01:43:05" (1/3) ... [2019-10-07 13:43:06,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d56326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:43:06, skipping insertion in model container [2019-10-07 13:43:06,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:43:05" (2/3) ... [2019-10-07 13:43:06,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d56326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:43:06, skipping insertion in model container [2019-10-07 13:43:06,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:43:06" (3/3) ... [2019-10-07 13:43:06,212 INFO L109 eAbstractionObserver]: Analyzing ICFG gr2006.i [2019-10-07 13:43:06,232 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 13:43:06,246 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 13:43:06,264 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 13:43:06,288 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 13:43:06,288 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 13:43:06,288 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 13:43:06,288 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 13:43:06,288 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 13:43:06,289 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 13:43:06,289 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 13:43:06,289 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 13:43:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-07 13:43:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-07 13:43:06,316 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:43:06,317 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:43:06,320 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:43:06,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:43:06,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1022443096, now seen corresponding path program 1 times [2019-10-07 13:43:06,334 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:43:06,334 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:43:06,334 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:43:06,334 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:43:06,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:43:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:43:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:06,417 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:43:06,417 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:43:06,417 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-07 13:43:06,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-07 13:43:06,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-07 13:43:06,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-07 13:43:06,432 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-10-07 13:43:06,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:43:06,452 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-10-07 13:43:06,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-07 13:43:06,453 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-07 13:43:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:43:06,462 INFO L225 Difference]: With dead ends: 29 [2019-10-07 13:43:06,462 INFO L226 Difference]: Without dead ends: 12 [2019-10-07 13:43:06,465 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-07 13:43:06,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-07 13:43:06,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-07 13:43:06,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-07 13:43:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-07 13:43:06,504 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-07 13:43:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:43:06,504 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-07 13:43:06,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-07 13:43:06,505 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-07 13:43:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 13:43:06,505 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:43:06,505 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:43:06,506 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:43:06,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:43:06,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1666502658, now seen corresponding path program 1 times [2019-10-07 13:43:06,507 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:43:06,507 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:43:06,507 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:43:06,507 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:43:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:43:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:43:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:06,635 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:43:06,636 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:43:06,636 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 13:43:06,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 13:43:06,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 13:43:06,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 13:43:06,638 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2019-10-07 13:43:06,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:43:06,715 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-10-07 13:43:06,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 13:43:06,716 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-07 13:43:06,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:43:06,717 INFO L225 Difference]: With dead ends: 20 [2019-10-07 13:43:06,717 INFO L226 Difference]: Without dead ends: 15 [2019-10-07 13:43:06,719 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-07 13:43:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-07 13:43:06,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-10-07 13:43:06,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-07 13:43:06,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-07 13:43:06,726 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-10-07 13:43:06,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:43:06,727 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-07 13:43:06,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 13:43:06,727 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-07 13:43:06,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-07 13:43:06,728 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:43:06,729 INFO L385 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:43:06,729 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:43:06,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:43:06,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1396448135, now seen corresponding path program 1 times [2019-10-07 13:43:06,730 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:43:06,730 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:43:06,731 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:43:06,731 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:43:06,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:43:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:43:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:06,817 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:43:06,817 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:43:06,817 INFO L95 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 [2019-10-07 13:43:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:43:06,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 13:43:06,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:43:06,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 13:43:06,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 13:43:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:06,970 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:43:06,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 13:43:07,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 13:43:07,053 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 13:43:07,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 13:43:07,057 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 13:43:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:07,140 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 13:43:07,178 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-07 13:43:07,178 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 13:43:07,195 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 13:43:07,205 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 13:43:07,213 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 13:43:07,273 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-07 13:43:07,511 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-07 13:43:07,538 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-07 13:43:07,545 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-07 13:43:07,545 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-07 13:43:07,546 INFO L193 IcfgInterpreter]: Reachable states at location L14-3 satisfy 87#(and (< main_~y~0 0) (<= 0 main_~x~0) (<= main_~y~0 0)) [2019-10-07 13:43:07,546 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-07 13:43:07,547 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-07 13:43:07,547 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 121#true [2019-10-07 13:43:07,548 INFO L193 IcfgInterpreter]: Reachable states at location L14-2 satisfy 93#(and (<= 0 main_~y~0) (or (and (not (< main_~y~0 0)) (<= 1 main_~x~0)) (and (= main_~y~0 0) (= main_~x~0 0) (<= main_~x~0 0) (<= 0 main_~x~0) (<= main_~y~0 0)))) [2019-10-07 13:43:07,548 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-07 13:43:07,548 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 112#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:43:07,549 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 116#true [2019-10-07 13:43:07,549 INFO L193 IcfgInterpreter]: Reachable states at location L15-2 satisfy 82#(<= 0 main_~x~0) [2019-10-07 13:43:07,550 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 107#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:43:07,550 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 97#(and (or (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0))) (or (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| 0))) [2019-10-07 13:43:07,550 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 102#(and (or (and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))) [2019-10-07 13:43:07,775 INFO L211 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-07 13:43:07,776 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6, 7] total 19 [2019-10-07 13:43:07,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-07 13:43:07,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-07 13:43:07,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2019-10-07 13:43:07,780 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 19 states. [2019-10-07 13:43:08,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:43:08,014 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-10-07 13:43:08,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-07 13:43:08,014 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 13 [2019-10-07 13:43:08,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:43:08,015 INFO L225 Difference]: With dead ends: 25 [2019-10-07 13:43:08,016 INFO L226 Difference]: Without dead ends: 20 [2019-10-07 13:43:08,017 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2019-10-07 13:43:08,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-07 13:43:08,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-07 13:43:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-07 13:43:08,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-07 13:43:08,027 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2019-10-07 13:43:08,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:43:08,028 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-07 13:43:08,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-07 13:43:08,028 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-07 13:43:08,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-07 13:43:08,029 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:43:08,030 INFO L385 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:43:08,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:43:08,231 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:43:08,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:43:08,231 INFO L82 PathProgramCache]: Analyzing trace with hash -927306090, now seen corresponding path program 2 times [2019-10-07 13:43:08,232 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:43:08,232 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:43:08,232 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:43:08,232 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:43:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:43:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:43:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:08,299 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:43:08,299 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:43:08,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-10-07 13:43:08,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-07 13:43:08,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-07 13:43:08,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-07 13:43:08,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:43:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:08,349 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:43:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:08,442 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 13:43:08,443 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-07 13:43:08,443 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 13:43:08,444 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 13:43:08,444 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 13:43:08,445 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 13:43:08,462 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-07 13:43:08,575 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-07 13:43:08,595 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-07 13:43:08,597 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-07 13:43:08,598 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-07 13:43:08,598 INFO L193 IcfgInterpreter]: Reachable states at location L14-3 satisfy 87#(and (< main_~y~0 0) (<= 0 main_~x~0) (<= main_~y~0 0)) [2019-10-07 13:43:08,598 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-07 13:43:08,599 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-07 13:43:08,599 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 121#true [2019-10-07 13:43:08,599 INFO L193 IcfgInterpreter]: Reachable states at location L14-2 satisfy 93#(and (<= 0 main_~y~0) (or (and (not (< main_~y~0 0)) (<= 1 main_~x~0)) (and (= main_~y~0 0) (= main_~x~0 0) (<= main_~x~0 0) (<= 0 main_~x~0) (<= main_~y~0 0)))) [2019-10-07 13:43:08,599 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-07 13:43:08,600 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 112#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:43:08,600 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 116#true [2019-10-07 13:43:08,600 INFO L193 IcfgInterpreter]: Reachable states at location L15-2 satisfy 82#(<= 0 main_~x~0) [2019-10-07 13:43:08,601 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 107#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:43:08,601 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 97#(and (or (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0))) (or (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| 0))) [2019-10-07 13:43:08,601 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 102#(and (or (and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))) [2019-10-07 13:43:08,820 INFO L211 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-07 13:43:08,820 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 7] total 20 [2019-10-07 13:43:08,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-07 13:43:08,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-07 13:43:08,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2019-10-07 13:43:08,823 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2019-10-07 13:43:09,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:43:09,211 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-10-07 13:43:09,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-07 13:43:09,214 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2019-10-07 13:43:09,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:43:09,215 INFO L225 Difference]: With dead ends: 37 [2019-10-07 13:43:09,216 INFO L226 Difference]: Without dead ends: 32 [2019-10-07 13:43:09,217 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=244, Invalid=686, Unknown=0, NotChecked=0, Total=930 [2019-10-07 13:43:09,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-07 13:43:09,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-07 13:43:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-07 13:43:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-10-07 13:43:09,225 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 19 [2019-10-07 13:43:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:43:09,225 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-10-07 13:43:09,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-07 13:43:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-10-07 13:43:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-07 13:43:09,229 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:43:09,229 INFO L385 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:43:09,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:43:09,431 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:43:09,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:43:09,432 INFO L82 PathProgramCache]: Analyzing trace with hash 62074612, now seen corresponding path program 3 times [2019-10-07 13:43:09,432 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:43:09,432 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:43:09,433 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:43:09,433 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:43:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:43:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:43:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:09,577 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:43:09,577 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:43:09,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-07 13:43:09,621 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-07 13:43:09,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-07 13:43:09,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-07 13:43:09,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:43:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:09,636 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:43:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:09,900 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 13:43:09,902 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-07 13:43:09,902 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 13:43:09,902 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 13:43:09,902 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 13:43:09,903 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 13:43:09,918 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-07 13:43:10,004 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-07 13:43:10,041 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-07 13:43:10,045 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-07 13:43:10,046 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-07 13:43:10,046 INFO L193 IcfgInterpreter]: Reachable states at location L14-3 satisfy 87#(and (< main_~y~0 0) (<= 0 main_~x~0) (<= main_~y~0 0)) [2019-10-07 13:43:10,046 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-07 13:43:10,046 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-07 13:43:10,047 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 121#true [2019-10-07 13:43:10,047 INFO L193 IcfgInterpreter]: Reachable states at location L14-2 satisfy 93#(and (<= 0 main_~y~0) (or (and (not (< main_~y~0 0)) (<= 1 main_~x~0)) (and (= main_~y~0 0) (= main_~x~0 0) (<= main_~x~0 0) (<= 0 main_~x~0) (<= main_~y~0 0)))) [2019-10-07 13:43:10,047 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-07 13:43:10,050 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 112#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:43:10,051 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 116#true [2019-10-07 13:43:10,051 INFO L193 IcfgInterpreter]: Reachable states at location L15-2 satisfy 82#(<= 0 main_~x~0) [2019-10-07 13:43:10,051 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 107#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:43:10,051 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 97#(and (or (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0))) (or (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| 1))) [2019-10-07 13:43:10,051 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 102#(and (or (and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))) [2019-10-07 13:43:10,219 INFO L211 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-07 13:43:10,220 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 7] total 32 [2019-10-07 13:43:10,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-07 13:43:10,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-07 13:43:10,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2019-10-07 13:43:10,223 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2019-10-07 13:43:11,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:43:11,096 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2019-10-07 13:43:11,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-07 13:43:11,098 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2019-10-07 13:43:11,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:43:11,099 INFO L225 Difference]: With dead ends: 61 [2019-10-07 13:43:11,099 INFO L226 Difference]: Without dead ends: 56 [2019-10-07 13:43:11,101 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=892, Invalid=2078, Unknown=0, NotChecked=0, Total=2970 [2019-10-07 13:43:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-07 13:43:11,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-07 13:43:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-07 13:43:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-10-07 13:43:11,111 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 31 [2019-10-07 13:43:11,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:43:11,111 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-10-07 13:43:11,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-07 13:43:11,111 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-10-07 13:43:11,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-07 13:43:11,113 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:43:11,113 INFO L385 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:43:11,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:43:11,318 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:43:11,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:43:11,318 INFO L82 PathProgramCache]: Analyzing trace with hash -98740048, now seen corresponding path program 4 times [2019-10-07 13:43:11,319 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:43:11,319 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:43:11,319 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:43:11,320 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:43:11,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:43:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:43:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:11,749 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:43:11,749 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:43:11,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:43:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:43:11,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-07 13:43:11,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:43:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:11,832 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:43:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:12,527 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 13:43:12,528 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-07 13:43:12,528 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 13:43:12,529 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 13:43:12,529 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 13:43:12,529 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 13:43:12,540 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-07 13:43:12,603 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-07 13:43:12,625 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-07 13:43:12,626 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-07 13:43:12,627 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-07 13:43:12,627 INFO L193 IcfgInterpreter]: Reachable states at location L14-3 satisfy 87#(and (< main_~y~0 0) (<= 0 main_~x~0) (<= main_~y~0 0)) [2019-10-07 13:43:12,628 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-07 13:43:12,628 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-07 13:43:12,628 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 121#true [2019-10-07 13:43:12,629 INFO L193 IcfgInterpreter]: Reachable states at location L14-2 satisfy 93#(and (<= 0 main_~y~0) (or (and (not (< main_~y~0 0)) (<= 1 main_~x~0)) (and (= main_~y~0 0) (= main_~x~0 0) (<= main_~x~0 0) (<= 0 main_~x~0) (<= main_~y~0 0)))) [2019-10-07 13:43:12,629 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-07 13:43:12,629 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 112#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:43:12,629 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 116#true [2019-10-07 13:43:12,629 INFO L193 IcfgInterpreter]: Reachable states at location L15-2 satisfy 82#(<= 0 main_~x~0) [2019-10-07 13:43:12,630 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 107#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:43:12,630 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 97#(and (or (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0))) (or (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| 1))) [2019-10-07 13:43:12,630 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 102#(and (or (and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))) [2019-10-07 13:43:12,956 INFO L211 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-07 13:43:12,956 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 7] total 56 [2019-10-07 13:43:12,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-10-07 13:43:12,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-10-07 13:43:12,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1993, Unknown=0, NotChecked=0, Total=3080 [2019-10-07 13:43:12,961 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2019-10-07 13:43:15,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:43:15,347 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2019-10-07 13:43:15,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-10-07 13:43:15,349 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2019-10-07 13:43:15,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:43:15,350 INFO L225 Difference]: With dead ends: 109 [2019-10-07 13:43:15,351 INFO L226 Difference]: Without dead ends: 104 [2019-10-07 13:43:15,356 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3484, Invalid=7022, Unknown=0, NotChecked=0, Total=10506 [2019-10-07 13:43:15,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-07 13:43:15,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-10-07 13:43:15,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-07 13:43:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2019-10-07 13:43:15,384 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 55 [2019-10-07 13:43:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:43:15,384 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2019-10-07 13:43:15,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-10-07 13:43:15,384 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2019-10-07 13:43:15,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-07 13:43:15,393 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:43:15,393 INFO L385 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:43:15,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:43:15,601 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:43:15,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:43:15,601 INFO L82 PathProgramCache]: Analyzing trace with hash 259412008, now seen corresponding path program 5 times [2019-10-07 13:43:15,601 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:43:15,602 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:43:15,602 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:43:15,602 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:43:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:43:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:43:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:16,601 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:43:16,602 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:43:16,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:43:16,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2019-10-07 13:43:16,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-07 13:43:16,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 50 conjunts are in the unsatisfiable core [2019-10-07 13:43:16,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:43:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:16,784 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:43:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:17,897 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 13:43:17,898 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-07 13:43:17,898 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 13:43:17,899 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 13:43:17,899 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 13:43:17,899 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 13:43:17,911 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-07 13:43:17,971 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-07 13:43:17,989 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-07 13:43:17,991 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-07 13:43:17,992 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-07 13:43:17,992 INFO L193 IcfgInterpreter]: Reachable states at location L14-3 satisfy 90#(and (< main_~y~0 0) (<= 0 main_~x~0) (<= main_~y~0 0)) [2019-10-07 13:43:17,992 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-07 13:43:17,993 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-07 13:43:17,993 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 124#true [2019-10-07 13:43:17,993 INFO L193 IcfgInterpreter]: Reachable states at location L14-2 satisfy 96#(and (<= 0 main_~y~0) (or (and (not (< main_~y~0 0)) (<= 1 main_~x~0)) (and (= main_~y~0 0) (= main_~x~0 0) (<= main_~x~0 0) (<= 0 main_~x~0) (<= main_~y~0 0)))) [2019-10-07 13:43:17,994 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-07 13:43:17,994 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 115#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:43:17,995 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 119#true [2019-10-07 13:43:17,995 INFO L193 IcfgInterpreter]: Reachable states at location L15-2 satisfy 85#(<= 0 main_~x~0) [2019-10-07 13:43:17,995 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 110#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:43:17,995 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 100#(and (or (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0))) (or (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| 0))) [2019-10-07 13:43:17,996 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 105#(and (or (and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))) [2019-10-07 13:43:18,294 INFO L211 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-07 13:43:18,294 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50, 7] total 61 [2019-10-07 13:43:18,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-10-07 13:43:18,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-10-07 13:43:18,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1308, Invalid=2352, Unknown=0, NotChecked=0, Total=3660 [2019-10-07 13:43:18,297 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 61 states. [2019-10-07 13:43:21,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:43:21,021 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2019-10-07 13:43:21,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-10-07 13:43:21,021 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 103 [2019-10-07 13:43:21,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:43:21,024 INFO L225 Difference]: With dead ends: 117 [2019-10-07 13:43:21,024 INFO L226 Difference]: Without dead ends: 112 [2019-10-07 13:43:21,027 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 256 SyntacticMatches, 43 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2868 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4161, Invalid=8271, Unknown=0, NotChecked=0, Total=12432 [2019-10-07 13:43:21,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-07 13:43:21,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-10-07 13:43:21,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-07 13:43:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2019-10-07 13:43:21,038 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 103 [2019-10-07 13:43:21,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:43:21,039 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2019-10-07 13:43:21,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-10-07 13:43:21,039 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2019-10-07 13:43:21,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-07 13:43:21,041 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:43:21,041 INFO L385 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:43:21,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:43:21,248 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:43:21,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:43:21,248 INFO L82 PathProgramCache]: Analyzing trace with hash -41654084, now seen corresponding path program 6 times [2019-10-07 13:43:21,249 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:43:21,249 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:43:21,249 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:43:21,249 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:43:21,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:43:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:43:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:24,096 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:43:24,096 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:43:24,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:43:24,188 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-07 13:43:24,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-07 13:43:24,192 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 154 conjunts are in the unsatisfiable core [2019-10-07 13:43:24,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:43:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:43:32,596 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:43:34,757 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2019-10-07 13:43:35,194 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2019-10-07 13:43:35,657 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2019-10-07 13:43:36,175 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2019-10-07 13:43:36,750 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2019-10-07 13:43:37,333 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2019-10-07 13:43:37,968 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2019-10-07 13:43:38,726 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 85 [2019-10-07 13:43:39,501 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 92 [2019-10-07 13:43:40,284 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 96 [2019-10-07 13:43:41,191 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 102 [2019-10-07 13:43:42,099 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2019-10-07 13:43:43,028 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 112 [2019-10-07 13:43:44,121 WARN L191 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 116 [2019-10-07 13:43:44,502 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2019-10-07 13:43:45,193 WARN L191 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 123 [2019-10-07 13:43:45,589 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2019-10-07 13:43:46,293 WARN L191 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 127 [2019-10-07 13:43:46,733 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2019-10-07 13:43:47,697 WARN L191 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 133 [2019-10-07 13:43:48,134 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-10-07 13:43:49,027 WARN L191 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 137 [2019-10-07 13:43:49,513 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2019-10-07 13:43:50,440 WARN L191 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 142 [2019-10-07 13:43:50,961 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2019-10-07 13:43:51,987 WARN L191 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 146 [2019-10-07 13:43:52,530 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2019-10-07 13:43:53,428 WARN L191 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 151 [2019-10-07 13:43:53,963 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2019-10-07 13:43:55,035 WARN L191 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 154 [2019-10-07 13:43:55,585 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2019-10-07 13:43:56,539 WARN L191 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 160 [2019-10-07 13:43:57,107 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2019-10-07 13:43:58,312 WARN L191 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 163 [2019-10-07 13:43:58,893 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-07 13:44:00,086 WARN L191 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 169 [2019-10-07 13:44:00,707 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-10-07 13:44:01,783 WARN L191 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 173 [2019-10-07 13:44:02,411 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2019-10-07 13:44:03,542 WARN L191 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 178 [2019-10-07 13:44:04,227 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2019-10-07 13:44:05,378 WARN L191 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 181 [2019-10-07 13:44:06,086 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2019-10-07 13:44:07,323 WARN L191 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 186 [2019-10-07 13:44:08,044 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2019-10-07 13:44:09,292 WARN L191 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 189 [2019-10-07 13:44:10,030 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-07 13:44:11,539 WARN L191 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 194 [2019-10-07 13:44:12,313 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2019-10-07 13:44:13,644 WARN L191 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 198 [2019-10-07 13:44:14,449 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2019-10-07 13:44:16,073 WARN L191 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 203 [2019-10-07 13:44:16,875 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2019-10-07 13:44:18,280 WARN L191 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 207 [2019-10-07 13:44:19,136 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2019-10-07 13:44:20,869 WARN L191 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 212 [2019-10-07 13:44:21,727 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2019-10-07 13:44:23,237 WARN L191 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 216 [2019-10-07 13:44:24,139 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2019-10-07 13:44:26,007 WARN L191 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 221 [2019-10-07 13:44:26,918 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2019-10-07 13:44:28,822 WARN L191 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 225 [2019-10-07 13:44:29,797 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2019-10-07 13:44:31,744 WARN L191 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 230 [2019-10-07 13:44:32,732 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2019-10-07 13:44:34,715 WARN L191 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 234 [2019-10-07 13:44:35,727 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2019-10-07 13:44:37,771 WARN L191 SmtUtils]: Spent 943.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 239 [2019-10-07 13:44:38,825 WARN L191 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2019-10-07 13:44:40,183 WARN L191 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 243 [2019-10-07 13:44:40,905 WARN L191 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 243 [2019-10-07 13:44:42,596 WARN L191 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 374 DAG size of output: 249 [2019-10-07 13:44:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:44:43,055 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 13:44:43,056 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-07 13:44:43,056 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 13:44:43,057 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 13:44:43,057 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 13:44:43,057 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 13:44:43,067 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-07 13:44:43,115 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-07 13:44:43,124 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-07 13:44:43,126 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-07 13:44:43,126 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-07 13:44:43,126 INFO L193 IcfgInterpreter]: Reachable states at location L14-3 satisfy 87#(and (< main_~y~0 0) (<= 0 main_~x~0) (<= main_~y~0 0)) [2019-10-07 13:44:43,126 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-07 13:44:43,127 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-07 13:44:43,127 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 121#true [2019-10-07 13:44:43,127 INFO L193 IcfgInterpreter]: Reachable states at location L14-2 satisfy 93#(and (<= 0 main_~y~0) (or (and (not (< main_~y~0 0)) (<= 1 main_~x~0)) (and (= main_~y~0 0) (= main_~x~0 0) (<= main_~x~0 0) (<= 0 main_~x~0) (<= main_~y~0 0)))) [2019-10-07 13:44:43,127 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-07 13:44:43,127 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 112#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:44:43,128 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 116#true [2019-10-07 13:44:43,128 INFO L193 IcfgInterpreter]: Reachable states at location L15-2 satisfy 82#(<= 0 main_~x~0) [2019-10-07 13:44:43,128 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 107#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:44:43,128 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 97#(and (or (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0))) (or (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| 1))) [2019-10-07 13:44:43,128 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 102#(and (or (and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))) [2019-10-07 13:44:44,404 INFO L211 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-07 13:44:44,404 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 104, 104, 7] total 312 [2019-10-07 13:44:44,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 312 states [2019-10-07 13:44:44,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 312 interpolants. [2019-10-07 13:44:44,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21834, Invalid=75198, Unknown=0, NotChecked=0, Total=97032 [2019-10-07 13:44:44,419 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 312 states. [2019-10-07 13:45:12,574 WARN L191 SmtUtils]: Spent 13.72 s on a formula simplification. DAG size of input: 1733 DAG size of output: 124 [2019-10-07 13:45:27,264 WARN L191 SmtUtils]: Spent 13.25 s on a formula simplification. DAG size of input: 1701 DAG size of output: 123 [2019-10-07 13:45:41,541 WARN L191 SmtUtils]: Spent 12.90 s on a formula simplification. DAG size of input: 1666 DAG size of output: 120 [2019-10-07 13:45:55,359 WARN L191 SmtUtils]: Spent 12.39 s on a formula simplification. DAG size of input: 1634 DAG size of output: 118 [2019-10-07 13:46:08,614 WARN L191 SmtUtils]: Spent 11.84 s on a formula simplification. DAG size of input: 1600 DAG size of output: 120 [2019-10-07 13:46:21,442 WARN L191 SmtUtils]: Spent 11.37 s on a formula simplification. DAG size of input: 1568 DAG size of output: 119 [2019-10-07 13:46:33,866 WARN L191 SmtUtils]: Spent 11.03 s on a formula simplification. DAG size of input: 1536 DAG size of output: 116 [2019-10-07 13:46:45,941 WARN L191 SmtUtils]: Spent 10.66 s on a formula simplification. DAG size of input: 1504 DAG size of output: 114 [2019-10-07 13:46:57,493 WARN L191 SmtUtils]: Spent 10.19 s on a formula simplification. DAG size of input: 1473 DAG size of output: 115 [2019-10-07 13:47:08,964 WARN L191 SmtUtils]: Spent 10.07 s on a formula simplification. DAG size of input: 1441 DAG size of output: 114 [2019-10-07 13:47:19,711 WARN L191 SmtUtils]: Spent 9.36 s on a formula simplification. DAG size of input: 1412 DAG size of output: 111 [2019-10-07 13:47:30,313 WARN L191 SmtUtils]: Spent 9.20 s on a formula simplification. DAG size of input: 1380 DAG size of output: 110 [2019-10-07 13:47:40,481 WARN L191 SmtUtils]: Spent 8.80 s on a formula simplification. DAG size of input: 1352 DAG size of output: 111 [2019-10-07 13:47:50,197 WARN L191 SmtUtils]: Spent 8.34 s on a formula simplification. DAG size of input: 1320 DAG size of output: 111 [2019-10-07 13:47:59,486 WARN L191 SmtUtils]: Spent 7.92 s on a formula simplification. DAG size of input: 1294 DAG size of output: 107 [2019-10-07 13:48:08,596 WARN L191 SmtUtils]: Spent 7.72 s on a formula simplification. DAG size of input: 1262 DAG size of output: 105 [2019-10-07 13:48:17,203 WARN L191 SmtUtils]: Spent 7.26 s on a formula simplification. DAG size of input: 1237 DAG size of output: 107 [2019-10-07 13:48:25,540 WARN L191 SmtUtils]: Spent 6.97 s on a formula simplification. DAG size of input: 1205 DAG size of output: 107 [2019-10-07 13:48:33,450 WARN L191 SmtUtils]: Spent 6.57 s on a formula simplification. DAG size of input: 1182 DAG size of output: 103 [2019-10-07 13:48:41,260 WARN L191 SmtUtils]: Spent 6.45 s on a formula simplification. DAG size of input: 1151 DAG size of output: 102 [2019-10-07 13:48:48,672 WARN L191 SmtUtils]: Spent 6.11 s on a formula simplification. DAG size of input: 1128 DAG size of output: 103 [2019-10-07 13:48:55,836 WARN L191 SmtUtils]: Spent 5.87 s on a formula simplification. DAG size of input: 1098 DAG size of output: 103 [2019-10-07 13:49:02,594 WARN L191 SmtUtils]: Spent 5.51 s on a formula simplification. DAG size of input: 1076 DAG size of output: 99 [2019-10-07 13:49:09,257 WARN L191 SmtUtils]: Spent 5.36 s on a formula simplification. DAG size of input: 1048 DAG size of output: 98 [2019-10-07 13:49:15,611 WARN L191 SmtUtils]: Spent 5.09 s on a formula simplification. DAG size of input: 1025 DAG size of output: 99 [2019-10-07 13:49:22,002 WARN L191 SmtUtils]: Spent 5.11 s on a formula simplification. DAG size of input: 999 DAG size of output: 99 [2019-10-07 13:49:27,970 WARN L191 SmtUtils]: Spent 4.73 s on a formula simplification. DAG size of input: 975 DAG size of output: 95 [2019-10-07 13:49:33,815 WARN L191 SmtUtils]: Spent 4.57 s on a formula simplification. DAG size of input: 948 DAG size of output: 96 [2019-10-07 13:49:39,412 WARN L191 SmtUtils]: Spent 4.33 s on a formula simplification. DAG size of input: 926 DAG size of output: 96 [2019-10-07 13:49:44,997 WARN L191 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 900 DAG size of output: 95 [2019-10-07 13:49:50,169 WARN L191 SmtUtils]: Spent 3.99 s on a formula simplification. DAG size of input: 878 DAG size of output: 92 [2019-10-07 13:49:55,327 WARN L191 SmtUtils]: Spent 3.92 s on a formula simplification. DAG size of input: 855 DAG size of output: 92 [2019-10-07 13:50:00,221 WARN L191 SmtUtils]: Spent 3.70 s on a formula simplification. DAG size of input: 831 DAG size of output: 91 [2019-10-07 13:50:04,820 WARN L191 SmtUtils]: Spent 3.38 s on a formula simplification. DAG size of input: 807 DAG size of output: 90 [2019-10-07 13:50:09,119 WARN L191 SmtUtils]: Spent 3.17 s on a formula simplification. DAG size of input: 786 DAG size of output: 85 [2019-10-07 13:50:13,354 WARN L191 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 762 DAG size of output: 85 [2019-10-07 13:50:17,314 WARN L191 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 743 DAG size of output: 85 [2019-10-07 13:50:21,273 WARN L191 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 720 DAG size of output: 85 [2019-10-07 13:50:24,942 WARN L191 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 701 DAG size of output: 79 [2019-10-07 13:50:28,563 WARN L191 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 678 DAG size of output: 78 [2019-10-07 13:50:31,964 WARN L191 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 661 DAG size of output: 80 [2019-10-07 13:50:35,355 WARN L191 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 639 DAG size of output: 78 [2019-10-07 13:50:38,478 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 622 DAG size of output: 75 [2019-10-07 13:50:41,551 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 600 DAG size of output: 74 [2019-10-07 13:50:44,416 WARN L191 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 584 DAG size of output: 74 [2019-10-07 13:50:47,127 WARN L191 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 562 DAG size of output: 74 [2019-10-07 13:50:49,750 WARN L191 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 548 DAG size of output: 69 [2019-10-07 13:50:52,302 WARN L191 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 526 DAG size of output: 68 [2019-10-07 13:50:54,749 WARN L191 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 511 DAG size of output: 68 [2019-10-07 13:50:57,105 WARN L191 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 489 DAG size of output: 68 [2019-10-07 13:50:59,369 WARN L191 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 476 DAG size of output: 63 [2019-10-07 13:51:01,506 WARN L191 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 455 DAG size of output: 63 [2019-10-07 13:51:03,559 WARN L191 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 442 DAG size of output: 63 [2019-10-07 13:51:05,602 WARN L191 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 422 DAG size of output: 62 [2019-10-07 13:51:07,481 WARN L191 SmtUtils]: Spent 934.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 57 [2019-10-07 13:51:09,267 WARN L191 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 57 [2019-10-07 13:51:11,006 WARN L191 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 57 [2019-10-07 13:51:12,703 WARN L191 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 56 [2019-10-07 13:51:14,261 WARN L191 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 52 [2019-10-07 13:51:15,759 WARN L191 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 52 [2019-10-07 13:51:17,191 WARN L191 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 52 [2019-10-07 13:51:18,593 WARN L191 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 51 [2019-10-07 13:51:19,848 WARN L191 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 47 [2019-10-07 13:51:21,191 WARN L191 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 46 [2019-10-07 13:51:22,424 WARN L191 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 47 [2019-10-07 13:51:23,571 WARN L191 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 48 [2019-10-07 13:51:24,646 WARN L191 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 41 [2019-10-07 13:51:25,773 WARN L191 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 41 [2019-10-07 13:51:26,774 WARN L191 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 42 [2019-10-07 13:51:27,798 WARN L191 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 42 [2019-10-07 13:51:28,700 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 37 [2019-10-07 13:51:29,782 WARN L191 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 38 [2019-10-07 13:51:30,619 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 38 [2019-10-07 13:51:31,447 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 37 [2019-10-07 13:51:32,179 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 33 [2019-10-07 13:51:32,930 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 33 [2019-10-07 13:51:33,604 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 33 [2019-10-07 13:51:34,285 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 33 [2019-10-07 13:51:35,052 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 28 [2019-10-07 13:51:35,710 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 27 [2019-10-07 13:51:36,290 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 28 [2019-10-07 13:51:36,897 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 27 [2019-10-07 13:51:42,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:51:42,214 INFO L93 Difference]: Finished difference Result 217 states and 266 transitions. [2019-10-07 13:51:42,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2019-10-07 13:51:42,215 INFO L78 Accepts]: Start accepts. Automaton has 312 states. Word has length 111 [2019-10-07 13:51:42,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:51:42,217 INFO L225 Difference]: With dead ends: 217 [2019-10-07 13:51:42,217 INFO L226 Difference]: Without dead ends: 212 [2019-10-07 13:51:42,224 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82634 ImplicationChecksByTransitivity, 482.0s TimeCoverageRelationStatistics Valid=41052, Invalid=125820, Unknown=0, NotChecked=0, Total=166872 [2019-10-07 13:51:42,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-10-07 13:51:42,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2019-10-07 13:51:42,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-10-07 13:51:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2019-10-07 13:51:42,248 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 111 [2019-10-07 13:51:42,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:51:42,248 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2019-10-07 13:51:42,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 312 states. [2019-10-07 13:51:42,248 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2019-10-07 13:51:42,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-10-07 13:51:42,252 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:51:42,252 INFO L385 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:51:42,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:51:42,458 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:51:42,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:51:42,459 INFO L82 PathProgramCache]: Analyzing trace with hash -616768394, now seen corresponding path program 7 times [2019-10-07 13:51:42,459 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:51:42,459 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:51:42,460 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:51:42,460 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:51:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:51:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:51:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:51:47,919 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:51:47,919 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:51:47,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:51:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:51:48,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 208 conjunts are in the unsatisfiable core [2019-10-07 13:51:48,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:51:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:51:48,401 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:51:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:51:48,606 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 13:51:48,607 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-07 13:51:48,607 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 13:51:48,607 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 13:51:48,607 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 13:51:48,608 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 13:51:48,619 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-07 13:51:48,662 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-07 13:51:48,673 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-07 13:51:48,674 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-07 13:51:48,674 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-07 13:51:48,674 INFO L193 IcfgInterpreter]: Reachable states at location L14-3 satisfy 87#(and (< main_~y~0 0) (<= 0 main_~x~0) (<= main_~y~0 0)) [2019-10-07 13:51:48,675 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-07 13:51:48,675 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-07 13:51:48,675 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 121#true [2019-10-07 13:51:48,675 INFO L193 IcfgInterpreter]: Reachable states at location L14-2 satisfy 93#(and (<= 0 main_~y~0) (or (and (not (< main_~y~0 0)) (<= 1 main_~x~0)) (and (= main_~y~0 0) (= main_~x~0 0) (<= main_~x~0 0) (<= 0 main_~x~0) (<= main_~y~0 0)))) [2019-10-07 13:51:48,675 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-07 13:51:48,676 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 112#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:51:48,676 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 116#true [2019-10-07 13:51:48,676 INFO L193 IcfgInterpreter]: Reachable states at location L15-2 satisfy 82#(<= 0 main_~x~0) [2019-10-07 13:51:48,676 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 107#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-07 13:51:48,676 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 97#(and (or (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0))) (or (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| 1))) [2019-10-07 13:51:48,676 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 102#(and (or (and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))) [2019-10-07 13:51:49,424 INFO L211 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-07 13:51:49,425 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105, 105, 7] total 113 [2019-10-07 13:51:49,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 113 states [2019-10-07 13:51:49,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2019-10-07 13:51:49,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=12324, Unknown=0, NotChecked=0, Total=12656 [2019-10-07 13:51:49,428 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 113 states. [2019-10-07 13:52:09,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:52:09,959 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2019-10-07 13:52:09,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2019-10-07 13:52:09,960 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 211 [2019-10-07 13:52:09,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:52:09,963 INFO L225 Difference]: With dead ends: 219 [2019-10-07 13:52:09,963 INFO L226 Difference]: Without dead ends: 214 [2019-10-07 13:52:09,965 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 624 SyntacticMatches, 2 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5579 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=850, Invalid=45590, Unknown=0, NotChecked=0, Total=46440 [2019-10-07 13:52:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-10-07 13:52:09,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2019-10-07 13:52:09,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-10-07 13:52:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2019-10-07 13:52:09,988 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 211 [2019-10-07 13:52:09,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:52:09,988 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2019-10-07 13:52:09,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 113 states. [2019-10-07 13:52:09,989 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2019-10-07 13:52:09,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-07 13:52:09,992 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:52:09,992 INFO L385 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:52:10,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:52:10,199 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:52:10,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:52:10,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1901255419, now seen corresponding path program 8 times [2019-10-07 13:52:10,200 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:52:10,200 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:52:10,201 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:52:10,201 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:52:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:52:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:52:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 2752 proven. 7550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:52:26,289 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:52:26,289 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:52:26,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:52:26,659 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 102 check-sat command(s) [2019-10-07 13:52:26,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-07 13:52:26,665 WARN L254 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 264 conjunts are in the unsatisfiable core [2019-10-07 13:52:26,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:53:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 202 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:53:04,645 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:53:08,240 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2019-10-07 13:53:09,080 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2019-10-07 13:53:09,961 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2019-10-07 13:53:11,024 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2019-10-07 13:53:12,114 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2019-10-07 13:53:13,414 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2019-10-07 13:53:13,972 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2019-10-07 13:53:14,802 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2019-10-07 13:53:16,136 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 89 [2019-10-07 13:53:16,807 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2019-10-07 13:53:17,654 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 96 [2019-10-07 13:53:18,322 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2019-10-07 13:53:19,341 WARN L191 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 112 [2019-10-07 13:53:20,273 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2019-10-07 13:53:21,370 WARN L191 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 120 [2019-10-07 13:53:23,037 WARN L191 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 117 [2019-10-07 13:53:23,849 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 113 [2019-10-07 13:53:24,942 WARN L191 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 124 [2019-10-07 13:53:25,780 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 120 [2019-10-07 13:53:27,246 WARN L191 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 144 [2019-10-07 13:53:27,958 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-07 13:53:29,143 WARN L191 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 138 [2019-10-07 13:53:30,082 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 134 [2019-10-07 13:53:31,319 WARN L191 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 145 [2019-10-07 13:53:32,317 WARN L191 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 141 [2019-10-07 13:53:33,611 WARN L191 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 152 [2019-10-07 13:53:34,626 WARN L191 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 148 [2019-10-07 13:53:35,957 WARN L191 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 159 [2019-10-07 13:53:37,019 WARN L191 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 155 [2019-10-07 13:53:38,636 WARN L191 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 184 [2019-10-07 13:53:39,519 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2019-10-07 13:53:41,322 WARN L191 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 192 [2019-10-07 13:53:42,231 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-10-07 13:53:43,762 WARN L191 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 179 [2019-10-07 13:53:44,944 WARN L191 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 174 [2019-10-07 13:53:46,773 WARN L191 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 205 [2019-10-07 13:53:47,736 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2019-10-07 13:53:49,643 WARN L191 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 211 [2019-10-07 13:53:50,675 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-07 13:53:52,375 WARN L191 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 194 [2019-10-07 13:53:53,708 WARN L191 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 189 [2019-10-07 13:53:55,743 WARN L191 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 223 [2019-10-07 13:53:56,814 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2019-10-07 13:53:58,585 WARN L191 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 204 [2019-10-07 13:54:00,003 WARN L191 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 199 [2019-10-07 13:54:01,857 WARN L191 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 209 [2019-10-07 13:54:03,299 WARN L191 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 204 [2019-10-07 13:54:05,214 WARN L191 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 214 [2019-10-07 13:54:06,701 WARN L191 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 209 [2019-10-07 13:54:09,040 WARN L191 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 247 [2019-10-07 13:54:10,237 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2019-10-07 13:54:12,609 WARN L191 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 253 [2019-10-07 13:54:13,829 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2019-10-07 13:54:16,306 WARN L191 SmtUtils]: Spent 972.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 259 [2019-10-07 13:54:17,566 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2019-10-07 13:54:20,079 WARN L191 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 333 DAG size of output: 265 [2019-10-07 13:54:21,339 WARN L191 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2019-10-07 13:54:23,523 WARN L191 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 239 [2019-10-07 13:54:25,239 WARN L191 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 234 [2019-10-07 13:54:27,890 WARN L191 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 349 DAG size of output: 277 [2019-10-07 13:54:29,231 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2019-10-07 13:54:31,551 WARN L191 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 249 [2019-10-07 13:54:33,371 WARN L191 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 244 [2019-10-07 13:54:35,708 WARN L191 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 254 [2019-10-07 13:54:37,582 WARN L191 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 249 [2019-10-07 13:54:40,446 WARN L191 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 373 DAG size of output: 295 [2019-10-07 13:54:41,864 WARN L191 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2019-10-07 13:54:44,775 WARN L191 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 381 DAG size of output: 301 [2019-10-07 13:54:46,230 WARN L191 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2019-10-07 13:54:48,735 WARN L191 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 269 [2019-10-07 13:54:50,738 WARN L191 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 264 [2019-10-07 13:54:53,797 WARN L191 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 397 DAG size of output: 313 [2019-10-07 13:54:55,334 WARN L191 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 269 [2019-10-07 13:54:58,434 WARN L191 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 405 DAG size of output: 319 [2019-10-07 13:54:59,965 WARN L191 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 274 [2019-10-07 13:55:02,663 WARN L191 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 329 DAG size of output: 284 [2019-10-07 13:55:04,793 WARN L191 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 279 [2019-10-07 13:55:07,501 WARN L191 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 335 DAG size of output: 289 [2019-10-07 13:55:09,672 WARN L191 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 284 [2019-10-07 13:55:12,409 WARN L191 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 342 DAG size of output: 295 [2019-10-07 13:55:14,610 WARN L191 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 290 [2019-10-07 13:55:17,965 WARN L191 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 438 DAG size of output: 344 [2019-10-07 13:55:19,631 WARN L191 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2019-10-07 13:55:23,122 WARN L191 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 447 DAG size of output: 351 [2019-10-07 13:55:24,808 WARN L191 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2019-10-07 13:55:27,765 WARN L191 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 362 DAG size of output: 312 [2019-10-07 13:55:30,111 WARN L191 SmtUtils]: Spent 940.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 309 [2019-10-07 13:55:33,796 WARN L191 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 466 DAG size of output: 366 [2019-10-07 13:55:35,607 WARN L191 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2019-10-07 13:55:38,691 WARN L191 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 379 DAG size of output: 327 [2019-10-07 13:55:40,589 WARN L191 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2019-10-07 13:55:43,684 WARN L191 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 392 DAG size of output: 336 [2019-10-07 13:55:45,657 WARN L191 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2019-10-07 13:55:49,683 WARN L191 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 505 DAG size of output: 399 [2019-10-07 13:55:51,721 WARN L191 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2019-10-07 13:55:55,050 WARN L191 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 418 DAG size of output: 357 [2019-10-07 13:55:57,194 WARN L191 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2019-10-07 13:56:00,744 WARN L191 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 431 DAG size of output: 369