/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_product22.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:14:38,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:14:38,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:14:38,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:14:38,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:14:38,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:14:38,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:14:38,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:14:38,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:14:38,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:14:38,713 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:14:38,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:14:38,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:14:38,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:14:38,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:14:38,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:14:38,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:14:38,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:14:38,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:14:38,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:14:38,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:14:38,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:14:38,727 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:14:38,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:14:38,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:14:38,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:14:38,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:14:38,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:14:38,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:14:38,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:14:38,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:14:38,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:14:38,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:14:38,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:14:38,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:14:38,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:14:38,741 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 05:14:38,757 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:14:38,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:14:38,758 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:14:38,758 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:14:38,758 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:14:38,758 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:14:38,759 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:14:38,759 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:14:38,759 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:14:38,759 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:14:38,759 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:14:38,760 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:14:38,760 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:14:38,760 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:14:38,760 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:14:38,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:14:38,761 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:14:38,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:14:38,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:14:38,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:14:38,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:14:38,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:14:38,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:14:38,763 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:14:38,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:14:38,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:14:38,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:14:38,763 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:14:38,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:14:38,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:14:38,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:14:38,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:14:38,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:14:38,765 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:14:38,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:14:38,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:14:38,765 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:14:38,765 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:14:39,056 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:14:39,075 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:14:39,079 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:14:39,081 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:14:39,081 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:14:39,082 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec9_product22.cil.c [2019-11-24 05:14:39,157 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b930dca7c/e8e8ce089d70475680df873a90e9cd92/FLAG9309e45aa [2019-11-24 05:14:39,838 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:14:39,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec9_product22.cil.c [2019-11-24 05:14:39,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b930dca7c/e8e8ce089d70475680df873a90e9cd92/FLAG9309e45aa [2019-11-24 05:14:40,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b930dca7c/e8e8ce089d70475680df873a90e9cd92 [2019-11-24 05:14:40,040 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:14:40,043 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:14:40,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:14:40,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:14:40,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:14:40,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:14:40" (1/1) ... [2019-11-24 05:14:40,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e90e1fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:40, skipping insertion in model container [2019-11-24 05:14:40,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:14:40" (1/1) ... [2019-11-24 05:14:40,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:14:40,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:14:40,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:14:40,966 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:14:41,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:14:41,162 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:14:41,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:41 WrapperNode [2019-11-24 05:14:41,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:14:41,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:14:41,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:14:41,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:14:41,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:41" (1/1) ... [2019-11-24 05:14:41,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:41" (1/1) ... [2019-11-24 05:14:41,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:14:41,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:14:41,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:14:41,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:14:41,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:41" (1/1) ... [2019-11-24 05:14:41,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:41" (1/1) ... [2019-11-24 05:14:41,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:41" (1/1) ... [2019-11-24 05:14:41,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:41" (1/1) ... [2019-11-24 05:14:41,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:41" (1/1) ... [2019-11-24 05:14:41,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:41" (1/1) ... [2019-11-24 05:14:41,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:41" (1/1) ... [2019-11-24 05:14:41,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:14:41,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:14:41,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:14:41,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:14:41,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:41" (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 05:14:41,545 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:14:41,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:14:41,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:14:41,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:14:41,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:14:49,018 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:14:49,019 INFO L284 CfgBuilder]: Removed 323 assume(true) statements. [2019-11-24 05:14:49,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:14:49 BoogieIcfgContainer [2019-11-24 05:14:49,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:14:49,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:14:49,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:14:49,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:14:49,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:14:40" (1/3) ... [2019-11-24 05:14:49,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0bc3e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:14:49, skipping insertion in model container [2019-11-24 05:14:49,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:41" (2/3) ... [2019-11-24 05:14:49,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0bc3e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:14:49, skipping insertion in model container [2019-11-24 05:14:49,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:14:49" (3/3) ... [2019-11-24 05:14:49,033 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec9_product22.cil.c [2019-11-24 05:14:49,044 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:14:49,051 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 05:14:49,060 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 05:14:49,083 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:14:49,083 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:14:49,083 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:14:49,084 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:14:49,084 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:14:49,084 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:14:49,084 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:14:49,084 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:14:49,099 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 05:14:49,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 05:14:49,105 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:49,106 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:49,106 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:49,111 INFO L82 PathProgramCache]: Analyzing trace with hash 97770073, now seen corresponding path program 1 times [2019-11-24 05:14:49,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:49,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850764760] [2019-11-24 05:14:49,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:49,491 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 05:14:49,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850764760] [2019-11-24 05:14:49,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:49,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:14:49,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838688737] [2019-11-24 05:14:49,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:14:49,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:49,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:14:49,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:14:49,516 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 05:14:49,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:49,543 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 05:14:49,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:14:49,545 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 05:14:49,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:49,558 INFO L225 Difference]: With dead ends: 54 [2019-11-24 05:14:49,558 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 05:14:49,565 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 05:14:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 05:14:49,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 05:14:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 05:14:49,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 05:14:49,602 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 05:14:49,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:49,603 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 05:14:49,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:14:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 05:14:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:14:49,604 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:49,604 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:49,604 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:49,605 INFO L82 PathProgramCache]: Analyzing trace with hash -382601414, now seen corresponding path program 1 times [2019-11-24 05:14:49,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:49,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934911824] [2019-11-24 05:14:49,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:49,734 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 05:14:49,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934911824] [2019-11-24 05:14:49,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:49,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:14:49,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484660562] [2019-11-24 05:14:49,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:14:49,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:49,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:14:49,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:14:49,739 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 05:14:49,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:49,760 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 05:14:49,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:14:49,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:14:49,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:49,762 INFO L225 Difference]: With dead ends: 50 [2019-11-24 05:14:49,762 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 05:14:49,763 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 05:14:49,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 05:14:49,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 05:14:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 05:14:49,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 05:14:49,781 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 05:14:49,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:49,782 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 05:14:49,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:14:49,782 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 05:14:49,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 05:14:49,784 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:49,784 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:49,784 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:49,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:49,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1069468572, now seen corresponding path program 1 times [2019-11-24 05:14:49,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:49,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020243980] [2019-11-24 05:14:49,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:49,951 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 05:14:49,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020243980] [2019-11-24 05:14:49,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:49,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:14:49,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496596546] [2019-11-24 05:14:49,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:14:49,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:49,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:14:49,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:14:49,953 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 3 states. [2019-11-24 05:14:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:49,988 INFO L93 Difference]: Finished difference Result 45 states and 67 transitions. [2019-11-24 05:14:49,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:14:49,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 05:14:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:49,989 INFO L225 Difference]: With dead ends: 45 [2019-11-24 05:14:49,989 INFO L226 Difference]: Without dead ends: 36 [2019-11-24 05:14:49,990 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 05:14:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-24 05:14:49,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-24 05:14:49,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-24 05:14:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2019-11-24 05:14:49,997 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 12 [2019-11-24 05:14:49,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:49,997 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2019-11-24 05:14:49,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:14:49,997 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2019-11-24 05:14:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:14:49,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:49,998 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:49,999 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:49,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:49,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1058900122, now seen corresponding path program 1 times [2019-11-24 05:14:49,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:50,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256872658] [2019-11-24 05:14:50,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:50,359 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 05:14:50,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256872658] [2019-11-24 05:14:50,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:50,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:14:50,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936281144] [2019-11-24 05:14:50,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:14:50,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:50,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:14:50,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:14:50,365 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 6 states. [2019-11-24 05:14:50,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:50,660 INFO L93 Difference]: Finished difference Result 68 states and 112 transitions. [2019-11-24 05:14:50,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:14:50,661 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-24 05:14:50,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:50,662 INFO L225 Difference]: With dead ends: 68 [2019-11-24 05:14:50,662 INFO L226 Difference]: Without dead ends: 60 [2019-11-24 05:14:50,663 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 05:14:50,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-24 05:14:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-24 05:14:50,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-24 05:14:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 100 transitions. [2019-11-24 05:14:50,673 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 100 transitions. Word has length 15 [2019-11-24 05:14:50,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:50,673 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 100 transitions. [2019-11-24 05:14:50,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:14:50,674 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 100 transitions. [2019-11-24 05:14:50,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 05:14:50,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:50,675 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:50,675 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:50,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:50,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1914846764, now seen corresponding path program 1 times [2019-11-24 05:14:50,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:50,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332503169] [2019-11-24 05:14:50,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:50,732 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 05:14:50,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332503169] [2019-11-24 05:14:50,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:50,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:14:50,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292753530] [2019-11-24 05:14:50,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:14:50,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:50,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:14:50,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:14:50,734 INFO L87 Difference]: Start difference. First operand 58 states and 100 transitions. Second operand 3 states. [2019-11-24 05:14:50,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:50,770 INFO L93 Difference]: Finished difference Result 168 states and 292 transitions. [2019-11-24 05:14:50,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:14:50,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 05:14:50,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:50,774 INFO L225 Difference]: With dead ends: 168 [2019-11-24 05:14:50,774 INFO L226 Difference]: Without dead ends: 112 [2019-11-24 05:14:50,775 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 05:14:50,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-24 05:14:50,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2019-11-24 05:14:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-24 05:14:50,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 185 transitions. [2019-11-24 05:14:50,803 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 185 transitions. Word has length 16 [2019-11-24 05:14:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:50,803 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 185 transitions. [2019-11-24 05:14:50,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:14:50,805 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 185 transitions. [2019-11-24 05:14:50,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:14:50,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:50,806 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:50,807 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:50,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:50,867 INFO L82 PathProgramCache]: Analyzing trace with hash -212891689, now seen corresponding path program 1 times [2019-11-24 05:14:50,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:50,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885917341] [2019-11-24 05:14:50,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:51,160 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 05:14:51,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885917341] [2019-11-24 05:14:51,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:51,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:14:51,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34341517] [2019-11-24 05:14:51,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:14:51,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:51,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:14:51,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:14:51,164 INFO L87 Difference]: Start difference. First operand 104 states and 185 transitions. Second operand 6 states. [2019-11-24 05:14:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:51,683 INFO L93 Difference]: Finished difference Result 160 states and 281 transitions. [2019-11-24 05:14:51,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:14:51,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-24 05:14:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:51,685 INFO L225 Difference]: With dead ends: 160 [2019-11-24 05:14:51,686 INFO L226 Difference]: Without dead ends: 152 [2019-11-24 05:14:51,688 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-24 05:14:51,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-11-24 05:14:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2019-11-24 05:14:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-24 05:14:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 269 transitions. [2019-11-24 05:14:51,712 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 269 transitions. Word has length 17 [2019-11-24 05:14:51,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:51,713 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 269 transitions. [2019-11-24 05:14:51,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:14:51,713 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 269 transitions. [2019-11-24 05:14:51,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-24 05:14:51,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:51,715 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 05:14:51,715 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:51,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:51,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2019937026, now seen corresponding path program 1 times [2019-11-24 05:14:51,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:51,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770674829] [2019-11-24 05:14:51,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:51,964 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 05:14:51,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770674829] [2019-11-24 05:14:51,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209082213] [2019-11-24 05:14:51,967 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 05:14:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:52,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 05:14:52,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:14:52,374 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 05:14:52,374 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:14:52,406 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 05:14:52,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1074258085] [2019-11-24 05:14:52,433 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-24 05:14:52,433 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:14:52,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:14:52,447 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:14:52,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:15:36,949 WARN L192 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 701 [2019-11-24 05:15:41,160 WARN L192 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 301 DAG size of output: 245 [2019-11-24 05:15:41,587 WARN L192 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 738 [2019-11-24 05:15:41,893 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8