/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/elevator_spec9_product32.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:48:38,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:48:38,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:48:38,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:48:38,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:48:38,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:48:38,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:48:38,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:48:38,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:48:38,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:48:38,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:48:38,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:48:38,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:48:38,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:48:38,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:48:38,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:48:38,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:48:38,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:48:38,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:48:38,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:48:38,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:48:38,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:48:38,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:48:38,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:48:38,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 04:48:38,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 04:48:38,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 04:48:38,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 04:48:38,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 04:48:38,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 04:48:38,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:48:38,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:48:38,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:48:38,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:48:38,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:48:38,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:48:38,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:48:38,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:48:38,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:48:38,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:48:38,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:48:38,877 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 04:48:38,898 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:48:38,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:48:38,899 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:48:38,900 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:48:38,900 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:48:38,900 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:48:38,900 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:48:38,900 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:48:38,900 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:48:38,901 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:48:38,902 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:48:38,902 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:48:38,902 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:48:38,903 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:48:38,903 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:48:38,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:48:38,905 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:48:38,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:48:38,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:48:38,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:48:38,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:48:38,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:48:38,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:48:38,907 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:48:38,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:48:38,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:48:38,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:48:38,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:48:38,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:48:38,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:48:38,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:48:38,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:48:38,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:48:38,910 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:48:38,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:48:38,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:48:38,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:48:38,911 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:48:39,210 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:48:39,232 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:48:39,235 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:48:39,237 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:48:39,237 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:48:39,238 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec9_product32.cil.c [2019-11-24 04:48:39,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abfea91c3/ed92f7d3bfb24bf990c83902018a84c5/FLAG83424be15 [2019-11-24 04:48:39,933 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:48:39,934 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec9_product32.cil.c [2019-11-24 04:48:39,957 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abfea91c3/ed92f7d3bfb24bf990c83902018a84c5/FLAG83424be15 [2019-11-24 04:48:40,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abfea91c3/ed92f7d3bfb24bf990c83902018a84c5 [2019-11-24 04:48:40,131 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:48:40,133 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:48:40,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:48:40,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:48:40,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:48:40,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:48:40" (1/1) ... [2019-11-24 04:48:40,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@580da5e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:48:40, skipping insertion in model container [2019-11-24 04:48:40,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:48:40" (1/1) ... [2019-11-24 04:48:40,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:48:40,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:48:40,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:48:40,973 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:48:41,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:48:41,289 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:48:41,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:48:41 WrapperNode [2019-11-24 04:48:41,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:48:41,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:48:41,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:48:41,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:48:41,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:48:41" (1/1) ... [2019-11-24 04:48:41,360 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:48:41" (1/1) ... [2019-11-24 04:48:41,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:48:41,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:48:41,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:48:41,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:48:41,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:48:41" (1/1) ... [2019-11-24 04:48:41,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:48:41" (1/1) ... [2019-11-24 04:48:41,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:48:41" (1/1) ... [2019-11-24 04:48:41,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:48:41" (1/1) ... [2019-11-24 04:48:41,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:48:41" (1/1) ... [2019-11-24 04:48:42,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:48:41" (1/1) ... [2019-11-24 04:48:42,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:48:41" (1/1) ... [2019-11-24 04:48:42,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:48:42,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:48:42,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:48:42,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:48:42,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:48:41" (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 04:48:42,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:48:42,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:48:42,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:48:42,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:49:52,705 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:49:52,706 INFO L284 CfgBuilder]: Removed 1697 assume(true) statements. [2019-11-24 04:49:52,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:49:52 BoogieIcfgContainer [2019-11-24 04:49:52,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:49:52,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:49:52,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:49:52,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:49:52,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:48:40" (1/3) ... [2019-11-24 04:49:52,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2ebd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:49:52, skipping insertion in model container [2019-11-24 04:49:52,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:48:41" (2/3) ... [2019-11-24 04:49:52,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2ebd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:49:52, skipping insertion in model container [2019-11-24 04:49:52,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:49:52" (3/3) ... [2019-11-24 04:49:52,717 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product32.cil.c [2019-11-24 04:49:52,727 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:49:52,739 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-24 04:49:52,750 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-24 04:49:52,801 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:49:52,802 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:49:52,802 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:49:52,802 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:49:52,802 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:49:52,803 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:49:52,803 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:49:52,803 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:49:52,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states. [2019-11-24 04:49:52,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:49:52,860 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:49:52,861 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:49:52,861 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:49:52,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:49:52,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2072096852, now seen corresponding path program 1 times [2019-11-24 04:49:52,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:49:52,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128509441] [2019-11-24 04:49:52,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:49:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:53,244 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 04:49:53,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128509441] [2019-11-24 04:49:53,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:49:53,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:49:53,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093028189] [2019-11-24 04:49:53,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:49:53,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:49:53,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:49:53,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:49:53,267 INFO L87 Difference]: Start difference. First operand 2429 states. Second operand 2 states. [2019-11-24 04:49:53,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:49:53,451 INFO L93 Difference]: Finished difference Result 2446 states and 4723 transitions. [2019-11-24 04:49:53,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:49:53,453 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-24 04:49:53,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:49:53,489 INFO L225 Difference]: With dead ends: 2446 [2019-11-24 04:49:53,489 INFO L226 Difference]: Without dead ends: 2427 [2019-11-24 04:49:53,495 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 04:49:53,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2019-11-24 04:49:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2427. [2019-11-24 04:49:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2427 states. [2019-11-24 04:49:53,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 4693 transitions. [2019-11-24 04:49:53,661 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 4693 transitions. Word has length 10 [2019-11-24 04:49:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:49:53,662 INFO L462 AbstractCegarLoop]: Abstraction has 2427 states and 4693 transitions. [2019-11-24 04:49:53,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:49:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 4693 transitions. [2019-11-24 04:49:53,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 04:49:53,671 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:49:53,671 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:49:53,672 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:49:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:49:53,672 INFO L82 PathProgramCache]: Analyzing trace with hash 56715792, now seen corresponding path program 1 times [2019-11-24 04:49:53,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:49:53,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621123373] [2019-11-24 04:49:53,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:49:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:53,851 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 04:49:53,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621123373] [2019-11-24 04:49:53,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:49:53,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:49:53,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137898706] [2019-11-24 04:49:53,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:49:53,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:49:53,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:49:53,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:49:53,856 INFO L87 Difference]: Start difference. First operand 2427 states and 4693 transitions. Second operand 3 states. [2019-11-24 04:49:54,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:49:54,917 INFO L93 Difference]: Finished difference Result 4501 states and 8697 transitions. [2019-11-24 04:49:54,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:49:54,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-24 04:49:54,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:49:54,944 INFO L225 Difference]: With dead ends: 4501 [2019-11-24 04:49:54,944 INFO L226 Difference]: Without dead ends: 3278 [2019-11-24 04:49:54,957 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 04:49:54,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3278 states. [2019-11-24 04:49:55,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3278 to 3204. [2019-11-24 04:49:55,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3204 states. [2019-11-24 04:49:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 6193 transitions. [2019-11-24 04:49:55,106 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 6193 transitions. Word has length 11 [2019-11-24 04:49:55,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:49:55,107 INFO L462 AbstractCegarLoop]: Abstraction has 3204 states and 6193 transitions. [2019-11-24 04:49:55,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:49:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 6193 transitions. [2019-11-24 04:49:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:49:55,110 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:49:55,111 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:49:55,112 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:49:55,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:49:55,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1758229946, now seen corresponding path program 1 times [2019-11-24 04:49:55,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:49:55,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500368522] [2019-11-24 04:49:55,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:49:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:55,268 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 04:49:55,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500368522] [2019-11-24 04:49:55,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:49:55,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:49:55,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326431784] [2019-11-24 04:49:55,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:49:55,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:49:55,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:49:55,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:49:55,272 INFO L87 Difference]: Start difference. First operand 3204 states and 6193 transitions. Second operand 3 states. [2019-11-24 04:49:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:49:55,895 INFO L93 Difference]: Finished difference Result 6958 states and 13445 transitions. [2019-11-24 04:49:55,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:49:55,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 04:49:55,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:49:55,935 INFO L225 Difference]: With dead ends: 6958 [2019-11-24 04:49:55,944 INFO L226 Difference]: Without dead ends: 4971 [2019-11-24 04:49:55,954 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 04:49:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4971 states. [2019-11-24 04:49:56,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4971 to 4747. [2019-11-24 04:49:56,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4747 states. [2019-11-24 04:49:56,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4747 states to 4747 states and 9173 transitions. [2019-11-24 04:49:56,174 INFO L78 Accepts]: Start accepts. Automaton has 4747 states and 9173 transitions. Word has length 12 [2019-11-24 04:49:56,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:49:56,174 INFO L462 AbstractCegarLoop]: Abstraction has 4747 states and 9173 transitions. [2019-11-24 04:49:56,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:49:56,175 INFO L276 IsEmpty]: Start isEmpty. Operand 4747 states and 9173 transitions. [2019-11-24 04:49:56,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 04:49:56,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:49:56,177 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:49:56,178 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:49:56,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:49:56,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1329406119, now seen corresponding path program 1 times [2019-11-24 04:49:56,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:49:56,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921828819] [2019-11-24 04:49:56,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:49:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:56,303 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 04:49:56,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921828819] [2019-11-24 04:49:56,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:49:56,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:49:56,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322087241] [2019-11-24 04:49:56,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:49:56,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:49:56,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:49:56,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:49:56,311 INFO L87 Difference]: Start difference. First operand 4747 states and 9173 transitions. Second operand 3 states. [2019-11-24 04:49:56,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:49:56,945 INFO L93 Difference]: Finished difference Result 8264 states and 15967 transitions. [2019-11-24 04:49:56,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:49:56,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-24 04:49:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:49:56,977 INFO L225 Difference]: With dead ends: 8264 [2019-11-24 04:49:56,977 INFO L226 Difference]: Without dead ends: 4745 [2019-11-24 04:49:56,986 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 04:49:56,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4745 states. [2019-11-24 04:49:57,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4745 to 4745. [2019-11-24 04:49:57,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4745 states. [2019-11-24 04:49:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4745 states to 4745 states and 9163 transitions. [2019-11-24 04:49:57,216 INFO L78 Accepts]: Start accepts. Automaton has 4745 states and 9163 transitions. Word has length 13 [2019-11-24 04:49:57,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:49:57,216 INFO L462 AbstractCegarLoop]: Abstraction has 4745 states and 9163 transitions. [2019-11-24 04:49:57,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:49:57,218 INFO L276 IsEmpty]: Start isEmpty. Operand 4745 states and 9163 transitions. [2019-11-24 04:49:57,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-24 04:49:57,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:49:57,220 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:49:57,220 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:49:57,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:49:57,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1738123683, now seen corresponding path program 1 times [2019-11-24 04:49:57,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:49:57,221 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184195393] [2019-11-24 04:49:57,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:49:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:57,345 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 04:49:57,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184195393] [2019-11-24 04:49:57,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:49:57,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:49:57,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429033223] [2019-11-24 04:49:57,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:49:57,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:49:57,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:49:57,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:49:57,347 INFO L87 Difference]: Start difference. First operand 4745 states and 9163 transitions. Second operand 3 states. [2019-11-24 04:49:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:49:58,035 INFO L93 Difference]: Finished difference Result 11631 states and 22458 transitions. [2019-11-24 04:49:58,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:49:58,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-24 04:49:58,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:49:58,083 INFO L225 Difference]: With dead ends: 11631 [2019-11-24 04:49:58,083 INFO L226 Difference]: Without dead ends: 8117 [2019-11-24 04:49:58,091 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 04:49:58,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2019-11-24 04:49:58,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 7817. [2019-11-24 04:49:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7817 states. [2019-11-24 04:49:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7817 states to 7817 states and 15088 transitions. [2019-11-24 04:49:58,344 INFO L78 Accepts]: Start accepts. Automaton has 7817 states and 15088 transitions. Word has length 14 [2019-11-24 04:49:58,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:49:58,345 INFO L462 AbstractCegarLoop]: Abstraction has 7817 states and 15088 transitions. [2019-11-24 04:49:58,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:49:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 7817 states and 15088 transitions. [2019-11-24 04:49:58,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:49:58,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:49:58,347 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:49:58,347 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:49:58,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:49:58,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1952700254, now seen corresponding path program 1 times [2019-11-24 04:49:58,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:49:58,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447562862] [2019-11-24 04:49:58,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:49:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:58,418 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 04:49:58,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447562862] [2019-11-24 04:49:58,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:49:58,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:49:58,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722507318] [2019-11-24 04:49:58,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:49:58,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:49:58,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:49:58,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:49:58,421 INFO L87 Difference]: Start difference. First operand 7817 states and 15088 transitions. Second operand 3 states.