/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/product-lines/email_spec8_product16.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:11:14,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:11:14,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:11:14,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:11:14,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:11:14,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:11:14,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:11:14,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:11:14,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:11:14,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:11:14,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:11:14,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:11:14,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:11:14,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:11:14,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:11:14,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:11:14,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:11:14,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:11:14,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:11:14,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:11:14,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:11:14,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:11:14,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:11:14,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:11:14,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:11:14,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:11:14,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:11:14,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:11:14,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:11:14,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:11:14,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:11:14,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:11:14,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:11:14,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:11:14,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:11:14,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:11:14,340 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 05:11:14,353 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:11:14,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:11:14,354 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:11:14,355 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:11:14,355 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:11:14,355 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:11:14,355 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:11:14,355 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:11:14,356 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:11:14,356 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:11:14,356 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:11:14,356 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:11:14,356 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:11:14,357 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:11:14,357 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:11:14,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:11:14,358 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:11:14,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:11:14,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:11:14,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:11:14,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:11:14,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:11:14,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:11:14,359 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:11:14,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:11:14,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:11:14,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:11:14,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:11:14,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:11:14,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:11:14,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:11:14,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:11:14,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:11:14,361 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:11:14,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:11:14,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:11:14,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:11:14,362 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:11:14,648 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:11:14,665 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:11:14,669 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:11:14,671 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:11:14,672 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:11:14,673 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec8_product16.cil.c [2019-11-24 05:11:14,728 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec1a9e7b4/6d435336926e49debb93ca29a6a38cba/FLAG3b94fb100 [2019-11-24 05:11:15,300 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:11:15,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec8_product16.cil.c [2019-11-24 05:11:15,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec1a9e7b4/6d435336926e49debb93ca29a6a38cba/FLAG3b94fb100 [2019-11-24 05:11:15,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec1a9e7b4/6d435336926e49debb93ca29a6a38cba [2019-11-24 05:11:15,509 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:11:15,510 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:11:15,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:11:15,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:11:15,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:11:15,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:11:15" (1/1) ... [2019-11-24 05:11:15,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59adcd8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:15, skipping insertion in model container [2019-11-24 05:11:15,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:11:15" (1/1) ... [2019-11-24 05:11:15,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:11:15,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:11:16,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:11:16,354 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:11:16,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:11:16,569 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:11:16,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:16 WrapperNode [2019-11-24 05:11:16,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:11:16,571 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:11:16,571 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:11:16,571 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:11:16,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:16" (1/1) ... [2019-11-24 05:11:16,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:16" (1/1) ... [2019-11-24 05:11:16,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:11:16,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:11:16,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:11:16,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:11:16,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:16" (1/1) ... [2019-11-24 05:11:16,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:16" (1/1) ... [2019-11-24 05:11:16,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:16" (1/1) ... [2019-11-24 05:11:16,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:16" (1/1) ... [2019-11-24 05:11:16,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:16" (1/1) ... [2019-11-24 05:11:16,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:16" (1/1) ... [2019-11-24 05:11:16,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:16" (1/1) ... [2019-11-24 05:11:16,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:11:16,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:11:16,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:11:16,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:11:16,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:11:16,940 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:11:16,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:11:16,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:11:16,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:11:16,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:11:24,074 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:11:24,074 INFO L284 CfgBuilder]: Removed 295 assume(true) statements. [2019-11-24 05:11:24,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:11:24 BoogieIcfgContainer [2019-11-24 05:11:24,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:11:24,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:11:24,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:11:24,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:11:24,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:11:15" (1/3) ... [2019-11-24 05:11:24,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27480124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:11:24, skipping insertion in model container [2019-11-24 05:11:24,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:16" (2/3) ... [2019-11-24 05:11:24,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27480124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:11:24, skipping insertion in model container [2019-11-24 05:11:24,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:11:24" (3/3) ... [2019-11-24 05:11:24,084 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec8_product16.cil.c [2019-11-24 05:11:24,094 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:11:24,102 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 05:11:24,112 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 05:11:24,134 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:11:24,135 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:11:24,135 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:11:24,136 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:11:24,136 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:11:24,136 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:11:24,136 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:11:24,136 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:11:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 05:11:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 05:11:24,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:24,160 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:24,160 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:24,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:24,167 INFO L82 PathProgramCache]: Analyzing trace with hash 197591111, now seen corresponding path program 1 times [2019-11-24 05:11:24,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:24,177 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596550409] [2019-11-24 05:11:24,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:11:24,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596550409] [2019-11-24 05:11:24,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:24,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:11:24,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590543725] [2019-11-24 05:11:24,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:11:24,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:24,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:11:24,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:11:24,553 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 05:11:24,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:24,579 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 05:11:24,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:11:24,581 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 05:11:24,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:24,594 INFO L225 Difference]: With dead ends: 54 [2019-11-24 05:11:24,594 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 05:11:24,598 INFO L630 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 [2019-11-24 05:11:24,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 05:11:24,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 05:11:24,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 05:11:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 05:11:24,638 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 05:11:24,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:24,638 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 05:11:24,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:11:24,640 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 05:11:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:11:24,641 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:24,641 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:24,641 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:24,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:24,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1436892500, now seen corresponding path program 1 times [2019-11-24 05:11:24,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:24,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604990878] [2019-11-24 05:11:24,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:11:24,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604990878] [2019-11-24 05:11:24,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:24,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:11:24,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473199605] [2019-11-24 05:11:24,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:11:24,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:24,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:11:24,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:24,821 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 05:11:24,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:24,843 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 05:11:24,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:11:24,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:11:24,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:24,846 INFO L225 Difference]: With dead ends: 50 [2019-11-24 05:11:24,846 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 05:11:24,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 05:11:24,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 05:11:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 05:11:24,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 05:11:24,864 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 05:11:24,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:24,864 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 05:11:24,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:11:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 05:11:24,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 05:11:24,865 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:24,866 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:24,866 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:24,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:24,868 INFO L82 PathProgramCache]: Analyzing trace with hash -330420579, now seen corresponding path program 1 times [2019-11-24 05:11:24,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:24,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36885634] [2019-11-24 05:11:24,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 05:11:24,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36885634] [2019-11-24 05:11:25,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:25,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:11:25,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762644394] [2019-11-24 05:11:25,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:11:25,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:25,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:11:25,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:25,002 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 3 states. [2019-11-24 05:11:25,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:25,053 INFO L93 Difference]: Finished difference Result 45 states and 67 transitions. [2019-11-24 05:11:25,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:11:25,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 05:11:25,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:25,055 INFO L225 Difference]: With dead ends: 45 [2019-11-24 05:11:25,056 INFO L226 Difference]: Without dead ends: 36 [2019-11-24 05:11:25,057 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-24 05:11:25,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-24 05:11:25,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-24 05:11:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2019-11-24 05:11:25,073 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 12 [2019-11-24 05:11:25,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:25,073 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2019-11-24 05:11:25,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:11:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2019-11-24 05:11:25,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:11:25,074 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:25,074 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:25,080 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:25,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1732675138, now seen corresponding path program 1 times [2019-11-24 05:11:25,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:25,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580513541] [2019-11-24 05:11:25,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 05:11:25,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580513541] [2019-11-24 05:11:25,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:25,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:11:25,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542818807] [2019-11-24 05:11:25,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:11:25,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:25,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:11:25,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 05:11:25,370 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 4 states. [2019-11-24 05:11:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:25,457 INFO L93 Difference]: Finished difference Result 68 states and 112 transitions. [2019-11-24 05:11:25,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:11:25,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 05:11:25,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:25,459 INFO L225 Difference]: With dead ends: 68 [2019-11-24 05:11:25,460 INFO L226 Difference]: Without dead ends: 60 [2019-11-24 05:11:25,460 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 05:11:25,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-24 05:11:25,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-24 05:11:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-24 05:11:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 100 transitions. [2019-11-24 05:11:25,471 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 100 transitions. Word has length 15 [2019-11-24 05:11:25,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:25,471 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 100 transitions. [2019-11-24 05:11:25,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:11:25,471 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 100 transitions. [2019-11-24 05:11:25,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-24 05:11:25,473 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:25,473 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:25,473 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:25,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:25,473 INFO L82 PathProgramCache]: Analyzing trace with hash -730042713, now seen corresponding path program 1 times [2019-11-24 05:11:25,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:25,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720724949] [2019-11-24 05:11:25,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:11:25,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720724949] [2019-11-24 05:11:25,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:25,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:11:25,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994184445] [2019-11-24 05:11:25,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:11:25,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:25,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:11:25,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:25,536 INFO L87 Difference]: Start difference. First operand 58 states and 100 transitions. Second operand 3 states. [2019-11-24 05:11:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:25,577 INFO L93 Difference]: Finished difference Result 168 states and 292 transitions. [2019-11-24 05:11:25,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:11:25,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-11-24 05:11:25,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:25,582 INFO L225 Difference]: With dead ends: 168 [2019-11-24 05:11:25,582 INFO L226 Difference]: Without dead ends: 112 [2019-11-24 05:11:25,586 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-24 05:11:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2019-11-24 05:11:25,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-24 05:11:25,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 185 transitions. [2019-11-24 05:11:25,611 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 185 transitions. Word has length 20 [2019-11-24 05:11:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:25,612 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 185 transitions. [2019-11-24 05:11:25,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:11:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 185 transitions. [2019-11-24 05:11:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-24 05:11:25,615 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:25,615 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:25,615 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:25,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:25,616 INFO L82 PathProgramCache]: Analyzing trace with hash 579294370, now seen corresponding path program 1 times [2019-11-24 05:11:25,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:25,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389855579] [2019-11-24 05:11:25,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:11:25,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389855579] [2019-11-24 05:11:25,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:25,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:11:25,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304699413] [2019-11-24 05:11:25,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:11:25,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:25,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:11:25,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:25,709 INFO L87 Difference]: Start difference. First operand 104 states and 185 transitions. Second operand 3 states. [2019-11-24 05:11:25,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:25,737 INFO L93 Difference]: Finished difference Result 304 states and 543 transitions. [2019-11-24 05:11:25,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:11:25,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-24 05:11:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:25,819 INFO L225 Difference]: With dead ends: 304 [2019-11-24 05:11:25,819 INFO L226 Difference]: Without dead ends: 202 [2019-11-24 05:11:25,823 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:25,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-24 05:11:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2019-11-24 05:11:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-24 05:11:25,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 349 transitions. [2019-11-24 05:11:25,860 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 349 transitions. Word has length 21 [2019-11-24 05:11:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:25,861 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 349 transitions. [2019-11-24 05:11:25,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:11:25,861 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 349 transitions. [2019-11-24 05:11:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-24 05:11:25,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:25,863 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:25,864 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:25,864 INFO L82 PathProgramCache]: Analyzing trace with hash -674033323, now seen corresponding path program 1 times [2019-11-24 05:11:25,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:25,865 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615208412] [2019-11-24 05:11:25,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:11:25,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615208412] [2019-11-24 05:11:25,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:25,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:11:25,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693002661] [2019-11-24 05:11:25,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:11:25,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:25,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:11:25,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:25,932 INFO L87 Difference]: Start difference. First operand 194 states and 349 transitions. Second operand 3 states. [2019-11-24 05:11:25,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:25,965 INFO L93 Difference]: Finished difference Result 570 states and 1027 transitions. [2019-11-24 05:11:25,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:11:25,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2019-11-24 05:11:25,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:25,968 INFO L225 Difference]: With dead ends: 570 [2019-11-24 05:11:25,968 INFO L226 Difference]: Without dead ends: 378 [2019-11-24 05:11:25,970 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:25,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2019-11-24 05:11:25,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 370. [2019-11-24 05:11:25,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2019-11-24 05:11:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 665 transitions. [2019-11-24 05:11:26,001 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 665 transitions. Word has length 22 [2019-11-24 05:11:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:26,002 INFO L462 AbstractCegarLoop]: Abstraction has 370 states and 665 transitions. [2019-11-24 05:11:26,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:11:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 665 transitions. [2019-11-24 05:11:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-24 05:11:26,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:26,004 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:26,004 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:26,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:26,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1477155612, now seen corresponding path program 1 times [2019-11-24 05:11:26,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:26,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387291173] [2019-11-24 05:11:26,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:11:26,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387291173] [2019-11-24 05:11:26,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:26,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:11:26,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850745256] [2019-11-24 05:11:26,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:11:26,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:26,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:11:26,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:26,079 INFO L87 Difference]: Start difference. First operand 370 states and 665 transitions. Second operand 3 states. [2019-11-24 05:11:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:26,144 INFO L93 Difference]: Finished difference Result 1090 states and 1959 transitions. [2019-11-24 05:11:26,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:11:26,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-24 05:11:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:26,151 INFO L225 Difference]: With dead ends: 1090 [2019-11-24 05:11:26,151 INFO L226 Difference]: Without dead ends: 722 [2019-11-24 05:11:26,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:26,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2019-11-24 05:11:26,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 714. [2019-11-24 05:11:26,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 714 states. [2019-11-24 05:11:26,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1273 transitions. [2019-11-24 05:11:26,207 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1273 transitions. Word has length 23 [2019-11-24 05:11:26,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:26,208 INFO L462 AbstractCegarLoop]: Abstraction has 714 states and 1273 transitions. [2019-11-24 05:11:26,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:11:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1273 transitions. [2019-11-24 05:11:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-24 05:11:26,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:26,215 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:26,215 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:26,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1213650970, now seen corresponding path program 1 times [2019-11-24 05:11:26,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:26,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034652803] [2019-11-24 05:11:26,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:11:26,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034652803] [2019-11-24 05:11:26,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:26,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:11:26,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836560097] [2019-11-24 05:11:26,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:11:26,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:26,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:11:26,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:26,284 INFO L87 Difference]: Start difference. First operand 714 states and 1273 transitions. Second operand 3 states. [2019-11-24 05:11:26,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:26,394 INFO L93 Difference]: Finished difference Result 2106 states and 3751 transitions. [2019-11-24 05:11:26,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:11:26,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-24 05:11:26,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:26,403 INFO L225 Difference]: With dead ends: 2106 [2019-11-24 05:11:26,403 INFO L226 Difference]: Without dead ends: 1394 [2019-11-24 05:11:26,405 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:26,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2019-11-24 05:11:26,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1386. [2019-11-24 05:11:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1386 states. [2019-11-24 05:11:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2441 transitions. [2019-11-24 05:11:26,503 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2441 transitions. Word has length 24 [2019-11-24 05:11:26,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:26,503 INFO L462 AbstractCegarLoop]: Abstraction has 1386 states and 2441 transitions. [2019-11-24 05:11:26,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:11:26,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2441 transitions. [2019-11-24 05:11:26,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-24 05:11:26,505 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:26,506 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:26,506 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:26,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:26,506 INFO L82 PathProgramCache]: Analyzing trace with hash 177898133, now seen corresponding path program 1 times [2019-11-24 05:11:26,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:26,507 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744650333] [2019-11-24 05:11:26,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 05:11:26,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744650333] [2019-11-24 05:11:26,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:26,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:11:26,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665485881] [2019-11-24 05:11:26,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:11:26,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:26,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:11:26,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:11:26,821 INFO L87 Difference]: Start difference. First operand 1386 states and 2441 transitions. Second operand 6 states. [2019-11-24 05:11:27,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:27,378 INFO L93 Difference]: Finished difference Result 1754 states and 3072 transitions. [2019-11-24 05:11:27,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:11:27,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-24 05:11:27,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:27,396 INFO L225 Difference]: With dead ends: 1754 [2019-11-24 05:11:27,397 INFO L226 Difference]: Without dead ends: 1746 [2019-11-24 05:11:27,398 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-24 05:11:27,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2019-11-24 05:11:27,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1730. [2019-11-24 05:11:27,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1730 states. [2019-11-24 05:11:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 3025 transitions. [2019-11-24 05:11:27,570 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 3025 transitions. Word has length 25 [2019-11-24 05:11:27,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:27,570 INFO L462 AbstractCegarLoop]: Abstraction has 1730 states and 3025 transitions. [2019-11-24 05:11:27,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:11:27,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 3025 transitions. [2019-11-24 05:11:27,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-24 05:11:27,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:27,573 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:27,573 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:27,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:27,573 INFO L82 PathProgramCache]: Analyzing trace with hash 341867531, now seen corresponding path program 1 times [2019-11-24 05:11:27,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:27,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115657842] [2019-11-24 05:11:27,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:11:27,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115657842] [2019-11-24 05:11:27,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806483774] [2019-11-24 05:11:27,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:11:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:28,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 05:11:28,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:11:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:11:28,187 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:11:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:11:28,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1357438982] [2019-11-24 05:11:28,240 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2019-11-24 05:11:28,240 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:11:28,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:11:28,257 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:11:28,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:12:05,693 WARN L192 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 689 [2019-11-24 05:12:09,690 WARN L192 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 301 DAG size of output: 245 [2019-11-24 05:12:10,136 WARN L192 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 727 [2019-11-24 05:12:12,062 WARN L192 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 1381 DAG size of output: 1375 [2019-11-24 05:12:13,084 WARN L192 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 1381 DAG size of output: 1375 [2019-11-24 05:12:14,160 WARN L192 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1375 DAG size of output: 1367 [2019-11-24 05:12:14,191 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7