/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_spec4_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:04:11,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:04:11,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:04:11,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:04:11,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:04:11,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:04:11,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:04:11,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:04:11,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:04:11,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:04:11,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:04:11,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:04:11,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:04:11,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:04:11,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:04:11,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:04:11,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:04:11,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:04:11,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:04:11,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:04:11,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:04:11,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:04:11,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:04:11,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:04:11,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:04:11,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:04:11,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:04:11,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:04:11,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:04:11,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:04:11,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:04:11,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:04:11,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:04:11,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:04:11,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:04:11,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:04:11,360 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 05:04:11,375 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:04:11,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:04:11,376 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:04:11,377 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:04:11,377 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:04:11,377 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:04:11,377 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:04:11,378 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:04:11,378 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:04:11,378 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:04:11,378 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:04:11,378 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:04:11,379 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:04:11,379 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:04:11,379 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:04:11,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:04:11,380 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:04:11,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:04:11,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:04:11,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:04:11,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:04:11,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:04:11,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:04:11,382 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:04:11,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:04:11,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:04:11,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:04:11,383 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:04:11,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:04:11,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:04:11,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:04:11,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:04:11,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:04:11,384 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:04:11,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:04:11,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:04:11,385 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:04:11,385 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:04:11,657 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:04:11,670 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:04:11,674 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:04:11,675 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:04:11,676 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:04:11,677 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec4_product31.cil.c [2019-11-24 05:04:11,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e46a6effd/67876874c8da4a709a1faa77e23b9984/FLAGb160787ed [2019-11-24 05:04:12,335 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:04:12,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec4_product31.cil.c [2019-11-24 05:04:12,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e46a6effd/67876874c8da4a709a1faa77e23b9984/FLAGb160787ed [2019-11-24 05:04:12,596 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e46a6effd/67876874c8da4a709a1faa77e23b9984 [2019-11-24 05:04:12,603 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:04:12,605 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:04:12,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:04:12,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:04:12,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:04:12,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:04:12" (1/1) ... [2019-11-24 05:04:12,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9375a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:12, skipping insertion in model container [2019-11-24 05:04:12,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:04:12" (1/1) ... [2019-11-24 05:04:12,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:04:12,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:04:13,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:04:13,430 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:04:13,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:04:13,691 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:04:13,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:13 WrapperNode [2019-11-24 05:04:13,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:04:13,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:04:13,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:04:13,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:04:13,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:13" (1/1) ... [2019-11-24 05:04:13,755 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:13" (1/1) ... [2019-11-24 05:04:13,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:04:13,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:04:13,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:04:13,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:04:13,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:13" (1/1) ... [2019-11-24 05:04:13,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:13" (1/1) ... [2019-11-24 05:04:13,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:13" (1/1) ... [2019-11-24 05:04:13,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:13" (1/1) ... [2019-11-24 05:04:13,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:13" (1/1) ... [2019-11-24 05:04:13,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:13" (1/1) ... [2019-11-24 05:04:13,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:13" (1/1) ... [2019-11-24 05:04:14,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:04:14,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:04:14,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:04:14,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:04:14,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:13" (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 05:04:14,087 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:04:14,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:04:14,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:04:14,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:04:14,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:04:23,220 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:04:23,220 INFO L284 CfgBuilder]: Removed 375 assume(true) statements. [2019-11-24 05:04:23,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:04:23 BoogieIcfgContainer [2019-11-24 05:04:23,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:04:23,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:04:23,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:04:23,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:04:23,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:04:12" (1/3) ... [2019-11-24 05:04:23,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7706de4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:04:23, skipping insertion in model container [2019-11-24 05:04:23,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:13" (2/3) ... [2019-11-24 05:04:23,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7706de4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:04:23, skipping insertion in model container [2019-11-24 05:04:23,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:04:23" (3/3) ... [2019-11-24 05:04:23,238 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec4_product31.cil.c [2019-11-24 05:04:23,249 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:04:23,258 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 05:04:23,271 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 05:04:23,299 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:04:23,300 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:04:23,300 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:04:23,300 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:04:23,300 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:04:23,300 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:04:23,300 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:04:23,301 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:04:23,319 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 05:04:23,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 05:04:23,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:23,329 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:23,329 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:23,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2075140401, now seen corresponding path program 1 times [2019-11-24 05:04:23,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:23,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633503013] [2019-11-24 05:04:23,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:23,759 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 05:04:23,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633503013] [2019-11-24 05:04:23,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:23,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:04:23,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238622969] [2019-11-24 05:04:23,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:04:23,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:23,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:04:23,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:04:23,781 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 05:04:23,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:23,802 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 05:04:23,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:04:23,804 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 05:04:23,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:23,816 INFO L225 Difference]: With dead ends: 54 [2019-11-24 05:04:23,816 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 05:04:23,820 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 05:04:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 05:04:23,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 05:04:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 05:04:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 05:04:23,862 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 05:04:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:23,863 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 05:04:23,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:04:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 05:04:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:04:23,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:23,864 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:23,864 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:23,865 INFO L82 PathProgramCache]: Analyzing trace with hash 435066526, now seen corresponding path program 1 times [2019-11-24 05:04:23,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:23,866 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251051167] [2019-11-24 05:04:23,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:23,964 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 05:04:23,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251051167] [2019-11-24 05:04:23,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:23,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:04:23,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946792156] [2019-11-24 05:04:23,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:04:23,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:23,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:04:23,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:04:23,968 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 05:04:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:23,991 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 05:04:23,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:04:23,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:04:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:23,993 INFO L225 Difference]: With dead ends: 50 [2019-11-24 05:04:23,993 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 05:04:23,994 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 05:04:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 05:04:24,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 05:04:24,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 05:04:24,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 05:04:24,002 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 05:04:24,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:24,002 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 05:04:24,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:04:24,003 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 05:04:24,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 05:04:24,003 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:24,004 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:24,004 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:24,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1214192868, now seen corresponding path program 1 times [2019-11-24 05:04:24,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:24,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211196003] [2019-11-24 05:04:24,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:24,273 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 05:04:24,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211196003] [2019-11-24 05:04:24,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:24,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:04:24,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292751854] [2019-11-24 05:04:24,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 05:04:24,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:24,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 05:04:24,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 05:04:24,276 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 5 states. [2019-11-24 05:04:24,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:24,667 INFO L93 Difference]: Finished difference Result 76 states and 122 transitions. [2019-11-24 05:04:24,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 05:04:24,668 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-24 05:04:24,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:24,669 INFO L225 Difference]: With dead ends: 76 [2019-11-24 05:04:24,669 INFO L226 Difference]: Without dead ends: 74 [2019-11-24 05:04:24,670 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 05:04:24,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-24 05:04:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2019-11-24 05:04:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-24 05:04:24,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 113 transitions. [2019-11-24 05:04:24,681 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 113 transitions. Word has length 12 [2019-11-24 05:04:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:24,682 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 113 transitions. [2019-11-24 05:04:24,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 05:04:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 113 transitions. [2019-11-24 05:04:24,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-24 05:04:24,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:24,683 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:24,683 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:24,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1321240587, now seen corresponding path program 1 times [2019-11-24 05:04:24,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:24,684 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250181797] [2019-11-24 05:04:24,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:24,737 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 05:04:24,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250181797] [2019-11-24 05:04:24,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:24,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:04:24,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759976836] [2019-11-24 05:04:24,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:04:24,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:24,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:04:24,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:04:24,740 INFO L87 Difference]: Start difference. First operand 66 states and 113 transitions. Second operand 3 states. [2019-11-24 05:04:24,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:24,766 INFO L93 Difference]: Finished difference Result 188 states and 327 transitions. [2019-11-24 05:04:24,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:04:24,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-24 05:04:24,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:24,768 INFO L225 Difference]: With dead ends: 188 [2019-11-24 05:04:24,768 INFO L226 Difference]: Without dead ends: 126 [2019-11-24 05:04:24,769 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 05:04:24,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-24 05:04:24,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2019-11-24 05:04:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-24 05:04:24,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 201 transitions. [2019-11-24 05:04:24,786 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 201 transitions. Word has length 14 [2019-11-24 05:04:24,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:24,786 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 201 transitions. [2019-11-24 05:04:24,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:04:24,787 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 201 transitions. [2019-11-24 05:04:24,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:04:24,788 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:24,788 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:24,788 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:24,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:24,789 INFO L82 PathProgramCache]: Analyzing trace with hash 67861624, now seen corresponding path program 1 times [2019-11-24 05:04:24,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:24,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367477183] [2019-11-24 05:04:24,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:25,132 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 05:04:25,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367477183] [2019-11-24 05:04:25,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:25,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:04:25,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567541759] [2019-11-24 05:04:25,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:04:25,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:25,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:04:25,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:04:25,135 INFO L87 Difference]: Start difference. First operand 112 states and 201 transitions. Second operand 6 states. [2019-11-24 05:04:25,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:25,450 INFO L93 Difference]: Finished difference Result 220 states and 398 transitions. [2019-11-24 05:04:25,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:04:25,451 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-24 05:04:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:25,453 INFO L225 Difference]: With dead ends: 220 [2019-11-24 05:04:25,453 INFO L226 Difference]: Without dead ends: 211 [2019-11-24 05:04:25,454 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-24 05:04:25,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-11-24 05:04:25,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2019-11-24 05:04:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-11-24 05:04:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 378 transitions. [2019-11-24 05:04:25,478 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 378 transitions. Word has length 15 [2019-11-24 05:04:25,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:25,478 INFO L462 AbstractCegarLoop]: Abstraction has 207 states and 378 transitions. [2019-11-24 05:04:25,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:04:25,478 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 378 transitions. [2019-11-24 05:04:25,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:04:25,479 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:25,480 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:25,480 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:25,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:25,480 INFO L82 PathProgramCache]: Analyzing trace with hash 508616490, now seen corresponding path program 1 times [2019-11-24 05:04:25,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:25,481 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678335556] [2019-11-24 05:04:25,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:25,539 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 05:04:25,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678335556] [2019-11-24 05:04:25,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:25,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:04:25,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778200840] [2019-11-24 05:04:25,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:04:25,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:25,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:04:25,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:04:25,542 INFO L87 Difference]: Start difference. First operand 207 states and 378 transitions. Second operand 3 states. [2019-11-24 05:04:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:25,571 INFO L93 Difference]: Finished difference Result 609 states and 1114 transitions. [2019-11-24 05:04:25,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:04:25,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-24 05:04:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:25,574 INFO L225 Difference]: With dead ends: 609 [2019-11-24 05:04:25,574 INFO L226 Difference]: Without dead ends: 404 [2019-11-24 05:04:25,576 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 05:04:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2019-11-24 05:04:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 387. [2019-11-24 05:04:25,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2019-11-24 05:04:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 712 transitions. [2019-11-24 05:04:25,611 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 712 transitions. Word has length 15 [2019-11-24 05:04:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:25,611 INFO L462 AbstractCegarLoop]: Abstraction has 387 states and 712 transitions. [2019-11-24 05:04:25,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:04:25,611 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 712 transitions. [2019-11-24 05:04:25,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 05:04:25,613 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:25,613 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:25,613 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:25,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:25,613 INFO L82 PathProgramCache]: Analyzing trace with hash -2110892957, now seen corresponding path program 1 times [2019-11-24 05:04:25,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:25,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589595192] [2019-11-24 05:04:25,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:04:25,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589595192] [2019-11-24 05:04:25,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987595536] [2019-11-24 05:04:25,798 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 05:04:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:26,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:04:26,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:04:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:04:26,154 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:04:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:04:26,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1518325489] [2019-11-24 05:04:26,234 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-24 05:04:26,234 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:04:26,240 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:04:26,249 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:04:26,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:05:18,590 WARN L192 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 686 [2019-11-24 05:05:22,633 WARN L192 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 316 DAG size of output: 257 [2019-11-24 05:05:22,987 WARN L192 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 728 [2019-11-24 05:05:26,185 WARN L192 SmtUtils]: Spent 2.70 s on a formula simplification that was a NOOP. DAG size: 1424