/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_spec9_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:15:53,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:15:53,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:15:53,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:15:53,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:15:53,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:15:53,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:15:53,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:15:53,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:15:53,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:15:53,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:15:53,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:15:53,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:15:53,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:15:53,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:15:53,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:15:53,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:15:53,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:15:53,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:15:53,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:15:53,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:15:53,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:15:53,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:15:53,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:15:53,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:15:53,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:15:53,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:15:53,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:15:53,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:15:53,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:15:53,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:15:53,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:15:53,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:15:53,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:15:53,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:15:53,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:15:53,269 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 05:15:53,284 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:15:53,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:15:53,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:15:53,288 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:15:53,288 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:15:53,288 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:15:53,288 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:15:53,288 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:15:53,289 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:15:53,289 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:15:53,289 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:15:53,289 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:15:53,289 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:15:53,290 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:15:53,290 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:15:53,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:15:53,292 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:15:53,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:15:53,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:15:53,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:15:53,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:15:53,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:15:53,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:15:53,294 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:15:53,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:15:53,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:15:53,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:15:53,295 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:15:53,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:15:53,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:15:53,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:15:53,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:15:53,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:15:53,297 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:15:53,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:15:53,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:15:53,298 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:15:53,298 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:15:53,569 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:15:53,583 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:15:53,587 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:15:53,588 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:15:53,588 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:15:53,589 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec9_product30.cil.c [2019-11-24 05:15:53,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/695f6ed9a/5faf6ce7746f460e827388f49359fa33/FLAG976529984 [2019-11-24 05:15:54,284 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:15:54,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec9_product30.cil.c [2019-11-24 05:15:54,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/695f6ed9a/5faf6ce7746f460e827388f49359fa33/FLAG976529984 [2019-11-24 05:15:54,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/695f6ed9a/5faf6ce7746f460e827388f49359fa33 [2019-11-24 05:15:54,511 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:15:54,512 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:15:54,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:15:54,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:15:54,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:15:54,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:15:54" (1/1) ... [2019-11-24 05:15:54,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6886fec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:54, skipping insertion in model container [2019-11-24 05:15:54,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:15:54" (1/1) ... [2019-11-24 05:15:54,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:15:54,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:15:55,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:15:55,454 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:15:55,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:15:55,689 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:15:55,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:55 WrapperNode [2019-11-24 05:15:55,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:15:55,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:15:55,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:15:55,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:15:55,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:55" (1/1) ... [2019-11-24 05:15:55,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:55" (1/1) ... [2019-11-24 05:15:55,866 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:15:55,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:15:55,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:15:55,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:15:55,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:55" (1/1) ... [2019-11-24 05:15:55,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:55" (1/1) ... [2019-11-24 05:15:55,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:55" (1/1) ... [2019-11-24 05:15:55,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:55" (1/1) ... [2019-11-24 05:15:55,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:55" (1/1) ... [2019-11-24 05:15:55,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:55" (1/1) ... [2019-11-24 05:15:55,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:55" (1/1) ... [2019-11-24 05:15:56,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:15:56,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:15:56,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:15:56,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:15:56,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:55" (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 05:15:56,084 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:15:56,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:15:56,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:15:56,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:15:56,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:16:03,606 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:16:03,607 INFO L284 CfgBuilder]: Removed 323 assume(true) statements. [2019-11-24 05:16:03,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:16:03 BoogieIcfgContainer [2019-11-24 05:16:03,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:16:03,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:16:03,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:16:03,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:16:03,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:15:54" (1/3) ... [2019-11-24 05:16:03,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737a7bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:16:03, skipping insertion in model container [2019-11-24 05:16:03,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:55" (2/3) ... [2019-11-24 05:16:03,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737a7bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:16:03, skipping insertion in model container [2019-11-24 05:16:03,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:16:03" (3/3) ... [2019-11-24 05:16:03,618 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec9_product30.cil.c [2019-11-24 05:16:03,628 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:16:03,635 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 05:16:03,644 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 05:16:03,664 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:16:03,664 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:16:03,664 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:16:03,664 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:16:03,665 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:16:03,665 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:16:03,665 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:16:03,665 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:16:03,681 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 05:16:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 05:16:03,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:03,689 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:03,689 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:03,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:03,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1279596330, now seen corresponding path program 1 times [2019-11-24 05:16:03,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:03,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673864545] [2019-11-24 05:16:03,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:04,113 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 05:16:04,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673864545] [2019-11-24 05:16:04,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:04,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:16:04,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546803188] [2019-11-24 05:16:04,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:16:04,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:04,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:16:04,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:16:04,138 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 05:16:04,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:04,163 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 05:16:04,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:16:04,165 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 05:16:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:04,177 INFO L225 Difference]: With dead ends: 54 [2019-11-24 05:16:04,177 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 05:16:04,181 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 05:16:04,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 05:16:04,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 05:16:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 05:16:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 05:16:04,228 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 05:16:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:04,228 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 05:16:04,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:16:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 05:16:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:16:04,229 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:04,230 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:04,230 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:04,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:04,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1806812946, now seen corresponding path program 1 times [2019-11-24 05:16:04,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:04,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144769712] [2019-11-24 05:16:04,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:04,421 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 05:16:04,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144769712] [2019-11-24 05:16:04,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:04,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:16:04,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417647391] [2019-11-24 05:16:04,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:16:04,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:04,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:16:04,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:04,426 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 05:16:04,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:04,453 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 05:16:04,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:16:04,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:16:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:04,456 INFO L225 Difference]: With dead ends: 50 [2019-11-24 05:16:04,456 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 05:16:04,457 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 05:16:04,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 05:16:04,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 05:16:04,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 05:16:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 05:16:04,473 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 05:16:04,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:04,473 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 05:16:04,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:16:04,474 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 05:16:04,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 05:16:04,475 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:04,476 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:04,476 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:04,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:04,477 INFO L82 PathProgramCache]: Analyzing trace with hash -883588535, now seen corresponding path program 1 times [2019-11-24 05:16:04,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:04,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218032602] [2019-11-24 05:16:04,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:04,646 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 05:16:04,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218032602] [2019-11-24 05:16:04,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:04,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:16:04,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478199513] [2019-11-24 05:16:04,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:16:04,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:04,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:16:04,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:04,650 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 3 states. [2019-11-24 05:16:04,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:04,692 INFO L93 Difference]: Finished difference Result 45 states and 67 transitions. [2019-11-24 05:16:04,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:16:04,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 05:16:04,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:04,694 INFO L225 Difference]: With dead ends: 45 [2019-11-24 05:16:04,694 INFO L226 Difference]: Without dead ends: 36 [2019-11-24 05:16:04,696 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 05:16:04,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-24 05:16:04,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-24 05:16:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-24 05:16:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2019-11-24 05:16:04,708 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 12 [2019-11-24 05:16:04,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:04,708 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2019-11-24 05:16:04,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:16:04,710 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2019-11-24 05:16:04,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:16:04,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:04,713 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:04,713 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:04,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:04,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1399867146, now seen corresponding path program 1 times [2019-11-24 05:16:04,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:04,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978736369] [2019-11-24 05:16:04,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:05,137 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 05:16:05,138 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978736369] [2019-11-24 05:16:05,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:05,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:16:05,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059310456] [2019-11-24 05:16:05,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:16:05,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:05,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:16:05,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:16:05,143 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 6 states. [2019-11-24 05:16:05,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:05,517 INFO L93 Difference]: Finished difference Result 68 states and 112 transitions. [2019-11-24 05:16:05,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:16:05,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-24 05:16:05,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:05,520 INFO L225 Difference]: With dead ends: 68 [2019-11-24 05:16:05,520 INFO L226 Difference]: Without dead ends: 60 [2019-11-24 05:16:05,521 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-24 05:16:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-24 05:16:05,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-24 05:16:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-24 05:16:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 100 transitions. [2019-11-24 05:16:05,530 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 100 transitions. Word has length 15 [2019-11-24 05:16:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:05,530 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 100 transitions. [2019-11-24 05:16:05,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:16:05,531 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 100 transitions. [2019-11-24 05:16:05,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 05:16:05,532 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:05,532 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:05,532 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:05,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1975183902, now seen corresponding path program 1 times [2019-11-24 05:16:05,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:05,533 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126027887] [2019-11-24 05:16:05,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:05,592 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 05:16:05,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126027887] [2019-11-24 05:16:05,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:05,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:16:05,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64863688] [2019-11-24 05:16:05,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:16:05,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:05,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:16:05,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:05,594 INFO L87 Difference]: Start difference. First operand 58 states and 100 transitions. Second operand 3 states. [2019-11-24 05:16:05,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:05,622 INFO L93 Difference]: Finished difference Result 168 states and 292 transitions. [2019-11-24 05:16:05,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:16:05,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 05:16:05,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:05,624 INFO L225 Difference]: With dead ends: 168 [2019-11-24 05:16:05,624 INFO L226 Difference]: Without dead ends: 112 [2019-11-24 05:16:05,625 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 05:16:05,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-24 05:16:05,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2019-11-24 05:16:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-24 05:16:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 185 transitions. [2019-11-24 05:16:05,647 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 185 transitions. Word has length 16 [2019-11-24 05:16:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:05,648 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 185 transitions. [2019-11-24 05:16:05,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:16:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 185 transitions. [2019-11-24 05:16:05,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:16:05,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:05,653 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:05,654 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:05,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:05,654 INFO L82 PathProgramCache]: Analyzing trace with hash 21922323, now seen corresponding path program 1 times [2019-11-24 05:16:05,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:05,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935512699] [2019-11-24 05:16:05,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:06,070 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 05:16:06,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935512699] [2019-11-24 05:16:06,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:06,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-24 05:16:06,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933762568] [2019-11-24 05:16:06,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-24 05:16:06,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:06,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-24 05:16:06,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-24 05:16:06,072 INFO L87 Difference]: Start difference. First operand 104 states and 185 transitions. Second operand 7 states. [2019-11-24 05:16:06,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:06,722 INFO L93 Difference]: Finished difference Result 160 states and 281 transitions. [2019-11-24 05:16:06,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 05:16:06,723 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-24 05:16:06,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:06,725 INFO L225 Difference]: With dead ends: 160 [2019-11-24 05:16:06,725 INFO L226 Difference]: Without dead ends: 152 [2019-11-24 05:16:06,726 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-11-24 05:16:06,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-11-24 05:16:06,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2019-11-24 05:16:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-24 05:16:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 269 transitions. [2019-11-24 05:16:06,748 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 269 transitions. Word has length 17 [2019-11-24 05:16:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:06,748 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 269 transitions. [2019-11-24 05:16:06,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-24 05:16:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 269 transitions. [2019-11-24 05:16:06,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-24 05:16:06,750 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:06,750 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:06,751 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:06,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:06,751 INFO L82 PathProgramCache]: Analyzing trace with hash -306403207, now seen corresponding path program 1 times [2019-11-24 05:16:06,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:06,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952503005] [2019-11-24 05:16:06,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:07,023 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 05:16:07,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952503005] [2019-11-24 05:16:07,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652902148] [2019-11-24 05:16:07,024 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 05:16:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:07,463 INFO L255 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 05:16:07,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:16:07,507 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 05:16:07,507 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:16:07,541 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 05:16:07,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [149704516] [2019-11-24 05:16:07,590 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-24 05:16:07,590 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:16:07,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:16:07,607 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:16:07,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:17:27,560 WARN L192 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 723 [2019-11-24 05:17:32,047 WARN L192 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 323 DAG size of output: 263 [2019-11-24 05:17:32,455 WARN L192 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 762 [2019-11-24 05:17:32,813 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8