/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/eca-rers2012/Problem04_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:37:38,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:37:38,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:37:38,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:37:38,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:37:38,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:37:38,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:37:38,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:37:38,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:37:38,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:37:38,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:37:38,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:37:38,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:37:38,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:37:38,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:37:38,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:37:38,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:37:38,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:37:38,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:37:38,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:37:38,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:37:38,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:37:38,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:37:38,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:37:38,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:37:38,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 23:37:38,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 23:37:38,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 23:37:38,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 23:37:38,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 23:37:38,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 23:37:38,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 23:37:38,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 23:37:38,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:37:38,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:37:38,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:37:38,988 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 [2019-11-23 23:37:39,010 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:37:39,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:37:39,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:37:39,013 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:37:39,014 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:37:39,014 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:37:39,014 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:37:39,014 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:37:39,014 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:37:39,015 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:37:39,015 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:37:39,015 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:37:39,015 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:37:39,015 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:37:39,016 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:37:39,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:37:39,018 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:37:39,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:37:39,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:37:39,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:37:39,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:37:39,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:37:39,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:37:39,020 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:37:39,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:37:39,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:37:39,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:37:39,021 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:37:39,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:37:39,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:37:39,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:37:39,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:37:39,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:37:39,024 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:37:39,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:37:39,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:37:39,025 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:37:39,025 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:37:39,293 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:37:39,308 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:37:39,311 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:37:39,312 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:37:39,313 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:37:39,313 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label20.c [2019-11-23 23:37:39,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0d472333/a1fe0e520d4b48a2bd2915474f99d65d/FLAG31020b53e [2019-11-23 23:37:40,091 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:37:40,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label20.c [2019-11-23 23:37:40,125 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0d472333/a1fe0e520d4b48a2bd2915474f99d65d/FLAG31020b53e [2019-11-23 23:37:40,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0d472333/a1fe0e520d4b48a2bd2915474f99d65d [2019-11-23 23:37:40,228 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:37:40,231 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:37:40,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:37:40,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:37:40,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:37:40,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:37:40" (1/1) ... [2019-11-23 23:37:40,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f7578f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:40, skipping insertion in model container [2019-11-23 23:37:40,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:37:40" (1/1) ... [2019-11-23 23:37:40,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:37:40,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:37:42,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:37:42,375 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:37:43,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:37:43,052 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:37:43,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:43 WrapperNode [2019-11-23 23:37:43,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:37:43,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:37:43,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:37:43,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:37:43,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:43" (1/1) ... [2019-11-23 23:37:43,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:43" (1/1) ... [2019-11-23 23:37:43,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:37:43,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:37:43,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:37:43,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:37:43,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:43" (1/1) ... [2019-11-23 23:37:43,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:43" (1/1) ... [2019-11-23 23:37:43,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:43" (1/1) ... [2019-11-23 23:37:43,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:43" (1/1) ... [2019-11-23 23:37:43,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:43" (1/1) ... [2019-11-23 23:37:43,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:43" (1/1) ... [2019-11-23 23:37:43,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:43" (1/1) ... [2019-11-23 23:37:43,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:37:43,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:37:43,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:37:43,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:37:43,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:43" (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 [2019-11-23 23:37:43,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:37:43,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:37:48,485 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:37:48,486 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 23:37:48,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:37:48 BoogieIcfgContainer [2019-11-23 23:37:48,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:37:48,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:37:48,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:37:48,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:37:48,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:37:40" (1/3) ... [2019-11-23 23:37:48,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4e1d7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:37:48, skipping insertion in model container [2019-11-23 23:37:48,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:43" (2/3) ... [2019-11-23 23:37:48,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4e1d7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:37:48, skipping insertion in model container [2019-11-23 23:37:48,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:37:48" (3/3) ... [2019-11-23 23:37:48,498 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label20.c [2019-11-23 23:37:48,508 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:37:48,518 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:37:48,530 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:37:48,574 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:37:48,574 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:37:48,575 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:37:48,575 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:37:48,575 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:37:48,575 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:37:48,575 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:37:48,575 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:37:48,610 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states. [2019-11-23 23:37:48,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2019-11-23 23:37:48,660 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:37:48,662 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:37:48,662 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:37:48,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:37:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1870340102, now seen corresponding path program 1 times [2019-11-23 23:37:48,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:37:48,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475039694] [2019-11-23 23:37:48,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:37:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:37:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:37:51,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475039694] [2019-11-23 23:37:51,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:37:51,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:37:51,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895394849] [2019-11-23 23:37:51,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:37:51,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:37:51,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:37:51,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:37:51,113 INFO L87 Difference]: Start difference. First operand 763 states. Second operand 4 states. [2019-11-23 23:37:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:37:58,102 INFO L93 Difference]: Finished difference Result 3045 states and 6053 transitions. [2019-11-23 23:37:58,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:37:58,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 755 [2019-11-23 23:37:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:37:58,156 INFO L225 Difference]: With dead ends: 3045 [2019-11-23 23:37:58,157 INFO L226 Difference]: Without dead ends: 2277 [2019-11-23 23:37:58,169 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:37:58,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2019-11-23 23:37:58,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2277. [2019-11-23 23:37:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2277 states. [2019-11-23 23:37:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3891 transitions. [2019-11-23 23:37:58,329 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 3891 transitions. Word has length 755 [2019-11-23 23:37:58,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:37:58,331 INFO L462 AbstractCegarLoop]: Abstraction has 2277 states and 3891 transitions. [2019-11-23 23:37:58,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:37:58,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 3891 transitions. [2019-11-23 23:37:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2019-11-23 23:37:58,354 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:37:58,355 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:37:58,355 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:37:58,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:37:58,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1328853524, now seen corresponding path program 1 times [2019-11-23 23:37:58,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:37:58,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292550457] [2019-11-23 23:37:58,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:37:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:37:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:37:58,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292550457] [2019-11-23 23:37:58,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:37:58,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:37:58,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978278905] [2019-11-23 23:37:58,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:37:58,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:37:58,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:37:58,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:37:58,894 INFO L87 Difference]: Start difference. First operand 2277 states and 3891 transitions. Second operand 3 states. [2019-11-23 23:38:03,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:03,152 INFO L93 Difference]: Finished difference Result 6827 states and 11670 transitions. [2019-11-23 23:38:03,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:38:03,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 759 [2019-11-23 23:38:03,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:03,178 INFO L225 Difference]: With dead ends: 6827 [2019-11-23 23:38:03,178 INFO L226 Difference]: Without dead ends: 4551 [2019-11-23 23:38:03,184 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 [2019-11-23 23:38:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2019-11-23 23:38:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 4551. [2019-11-23 23:38:03,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4551 states. [2019-11-23 23:38:03,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4551 states to 4551 states and 7005 transitions. [2019-11-23 23:38:03,286 INFO L78 Accepts]: Start accepts. Automaton has 4551 states and 7005 transitions. Word has length 759 [2019-11-23 23:38:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:03,286 INFO L462 AbstractCegarLoop]: Abstraction has 4551 states and 7005 transitions. [2019-11-23 23:38:03,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:38:03,286 INFO L276 IsEmpty]: Start isEmpty. Operand 4551 states and 7005 transitions. [2019-11-23 23:38:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2019-11-23 23:38:03,330 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:03,330 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:38:03,330 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:03,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:03,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1392788847, now seen corresponding path program 1 times [2019-11-23 23:38:03,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:03,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492502702] [2019-11-23 23:38:03,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:38:03,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492502702] [2019-11-23 23:38:03,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:38:03,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:38:03,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835330314] [2019-11-23 23:38:03,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:38:03,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:03,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:38:03,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:38:03,661 INFO L87 Difference]: Start difference. First operand 4551 states and 7005 transitions. Second operand 4 states. [2019-11-23 23:38:10,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:10,167 INFO L93 Difference]: Finished difference Result 18197 states and 28015 transitions. [2019-11-23 23:38:10,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:38:10,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 761 [2019-11-23 23:38:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:10,226 INFO L225 Difference]: With dead ends: 18197 [2019-11-23 23:38:10,226 INFO L226 Difference]: Without dead ends: 13647 [2019-11-23 23:38:10,234 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:38:10,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13647 states. [2019-11-23 23:38:10,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13647 to 13647. [2019-11-23 23:38:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13647 states. [2019-11-23 23:38:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13647 states to 13647 states and 18754 transitions. [2019-11-23 23:38:10,501 INFO L78 Accepts]: Start accepts. Automaton has 13647 states and 18754 transitions. Word has length 761 [2019-11-23 23:38:10,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:10,502 INFO L462 AbstractCegarLoop]: Abstraction has 13647 states and 18754 transitions. [2019-11-23 23:38:10,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:38:10,502 INFO L276 IsEmpty]: Start isEmpty. Operand 13647 states and 18754 transitions. [2019-11-23 23:38:10,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2019-11-23 23:38:10,543 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:10,544 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:38:10,544 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:10,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash -523052384, now seen corresponding path program 1 times [2019-11-23 23:38:10,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:10,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263883551] [2019-11-23 23:38:10,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 23:38:11,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263883551] [2019-11-23 23:38:11,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:38:11,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:38:11,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036275108] [2019-11-23 23:38:11,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:38:11,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:11,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:38:11,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:38:11,036 INFO L87 Difference]: Start difference. First operand 13647 states and 18754 transitions. Second operand 3 states. [2019-11-23 23:38:15,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:15,096 INFO L93 Difference]: Finished difference Result 34115 states and 47733 transitions. [2019-11-23 23:38:15,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:38:15,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 797 [2019-11-23 23:38:15,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:15,160 INFO L225 Difference]: With dead ends: 34115 [2019-11-23 23:38:15,160 INFO L226 Difference]: Without dead ends: 20469 [2019-11-23 23:38:15,174 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 [2019-11-23 23:38:15,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20469 states. [2019-11-23 23:38:15,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20469 to 20469. [2019-11-23 23:38:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20469 states. [2019-11-23 23:38:15,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20469 states to 20469 states and 27958 transitions. [2019-11-23 23:38:15,450 INFO L78 Accepts]: Start accepts. Automaton has 20469 states and 27958 transitions. Word has length 797 [2019-11-23 23:38:15,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:15,450 INFO L462 AbstractCegarLoop]: Abstraction has 20469 states and 27958 transitions. [2019-11-23 23:38:15,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:38:15,451 INFO L276 IsEmpty]: Start isEmpty. Operand 20469 states and 27958 transitions. [2019-11-23 23:38:15,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 805 [2019-11-23 23:38:15,496 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:15,497 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:38:15,497 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:15,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:15,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1719366608, now seen corresponding path program 1 times [2019-11-23 23:38:15,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:15,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746219004] [2019-11-23 23:38:15,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 23:38:15,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746219004] [2019-11-23 23:38:15,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375881799] [2019-11-23 23:38:15,945 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 [2019-11-23 23:38:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:16,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:38:16,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:38:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 23:38:16,808 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:38:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 23:38:17,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:38:17,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2019-11-23 23:38:17,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404087957] [2019-11-23 23:38:17,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:38:17,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:17,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:38:17,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:38:17,107 INFO L87 Difference]: Start difference. First operand 20469 states and 27958 transitions. Second operand 3 states. [2019-11-23 23:38:21,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:21,295 INFO L93 Difference]: Finished difference Result 57613 states and 78713 transitions. [2019-11-23 23:38:21,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:38:21,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 804 [2019-11-23 23:38:21,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:21,363 INFO L225 Difference]: With dead ends: 57613 [2019-11-23 23:38:21,363 INFO L226 Difference]: Without dead ends: 37145 [2019-11-23 23:38:21,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1609 GetRequests, 1605 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:38:21,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37145 states. [2019-11-23 23:38:21,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37145 to 37145. [2019-11-23 23:38:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37145 states. [2019-11-23 23:38:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37145 states to 37145 states and 48926 transitions. [2019-11-23 23:38:21,976 INFO L78 Accepts]: Start accepts. Automaton has 37145 states and 48926 transitions. Word has length 804 [2019-11-23 23:38:21,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:21,977 INFO L462 AbstractCegarLoop]: Abstraction has 37145 states and 48926 transitions. [2019-11-23 23:38:21,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:38:21,977 INFO L276 IsEmpty]: Start isEmpty. Operand 37145 states and 48926 transitions. [2019-11-23 23:38:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2019-11-23 23:38:22,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:22,087 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:38:22,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:38:22,292 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:22,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:22,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1561271453, now seen corresponding path program 1 times [2019-11-23 23:38:22,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:22,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461490196] [2019-11-23 23:38:22,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-11-23 23:38:23,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461490196] [2019-11-23 23:38:23,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:38:23,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:38:23,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216561263] [2019-11-23 23:38:23,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:38:23,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:23,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:38:23,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:38:23,215 INFO L87 Difference]: Start difference. First operand 37145 states and 48926 transitions. Second operand 3 states. [2019-11-23 23:38:28,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:28,259 INFO L93 Difference]: Finished difference Result 79595 states and 105275 transitions. [2019-11-23 23:38:28,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:38:28,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 908 [2019-11-23 23:38:28,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:28,361 INFO L225 Difference]: With dead ends: 79595 [2019-11-23 23:38:28,361 INFO L226 Difference]: Without dead ends: 42451 [2019-11-23 23:38:28,395 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 [2019-11-23 23:38:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42451 states. [2019-11-23 23:38:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42451 to 42451. [2019-11-23 23:38:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42451 states. [2019-11-23 23:38:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42451 states to 42451 states and 53061 transitions. [2019-11-23 23:38:28,932 INFO L78 Accepts]: Start accepts. Automaton has 42451 states and 53061 transitions. Word has length 908 [2019-11-23 23:38:28,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:28,933 INFO L462 AbstractCegarLoop]: Abstraction has 42451 states and 53061 transitions. [2019-11-23 23:38:28,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:38:28,937 INFO L276 IsEmpty]: Start isEmpty. Operand 42451 states and 53061 transitions. [2019-11-23 23:38:28,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2019-11-23 23:38:28,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:28,973 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:38:28,973 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:28,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:28,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1716175507, now seen corresponding path program 1 times [2019-11-23 23:38:28,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:28,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54297849] [2019-11-23 23:38:28,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-11-23 23:38:29,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54297849] [2019-11-23 23:38:29,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:38:29,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:38:29,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899934378] [2019-11-23 23:38:29,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:38:29,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:29,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:38:29,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:38:29,975 INFO L87 Difference]: Start difference. First operand 42451 states and 53061 transitions. Second operand 3 states. [2019-11-23 23:38:35,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:35,048 INFO L93 Difference]: Finished difference Result 94757 states and 118474 transitions. [2019-11-23 23:38:35,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:38:35,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 915 [2019-11-23 23:38:35,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:35,119 INFO L225 Difference]: With dead ends: 94757 [2019-11-23 23:38:35,119 INFO L226 Difference]: Without dead ends: 52307 [2019-11-23 23:38:35,146 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 [2019-11-23 23:38:35,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52307 states. [2019-11-23 23:38:35,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52307 to 52305. [2019-11-23 23:38:35,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52305 states. [2019-11-23 23:38:35,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52305 states to 52305 states and 63553 transitions. [2019-11-23 23:38:35,874 INFO L78 Accepts]: Start accepts. Automaton has 52305 states and 63553 transitions. Word has length 915 [2019-11-23 23:38:35,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:35,874 INFO L462 AbstractCegarLoop]: Abstraction has 52305 states and 63553 transitions. [2019-11-23 23:38:35,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:38:35,874 INFO L276 IsEmpty]: Start isEmpty. Operand 52305 states and 63553 transitions. [2019-11-23 23:38:35,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2019-11-23 23:38:35,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:35,919 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:38:35,920 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:35,920 INFO L82 PathProgramCache]: Analyzing trace with hash -978655637, now seen corresponding path program 1 times [2019-11-23 23:38:35,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:35,921 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946163089] [2019-11-23 23:38:35,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 23:38:36,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946163089] [2019-11-23 23:38:36,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:38:36,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 23:38:36,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415656247] [2019-11-23 23:38:36,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:38:36,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:36,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:38:36,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:38:36,929 INFO L87 Difference]: Start difference. First operand 52305 states and 63553 transitions. Second operand 4 states. [2019-11-23 23:38:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:43,235 INFO L93 Difference]: Finished difference Result 104609 states and 127105 transitions. [2019-11-23 23:38:43,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:38:43,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 917 [2019-11-23 23:38:43,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:43,288 INFO L225 Difference]: With dead ends: 104609 [2019-11-23 23:38:43,289 INFO L226 Difference]: Without dead ends: 52305 [2019-11-23 23:38:43,316 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:38:43,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52305 states. [2019-11-23 23:38:43,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52305 to 52305. [2019-11-23 23:38:43,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52305 states. [2019-11-23 23:38:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52305 states to 52305 states and 59587 transitions. [2019-11-23 23:38:43,851 INFO L78 Accepts]: Start accepts. Automaton has 52305 states and 59587 transitions. Word has length 917 [2019-11-23 23:38:43,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:43,851 INFO L462 AbstractCegarLoop]: Abstraction has 52305 states and 59587 transitions. [2019-11-23 23:38:43,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:38:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 52305 states and 59587 transitions. [2019-11-23 23:38:43,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 944 [2019-11-23 23:38:43,888 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:43,889 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:38:43,889 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:43,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:43,890 INFO L82 PathProgramCache]: Analyzing trace with hash 416696983, now seen corresponding path program 1 times [2019-11-23 23:38:43,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:43,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335509894] [2019-11-23 23:38:43,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 23:38:45,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335509894] [2019-11-23 23:38:45,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:38:45,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:38:45,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105690962] [2019-11-23 23:38:45,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:38:45,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:45,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:38:45,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:38:45,017 INFO L87 Difference]: Start difference. First operand 52305 states and 59587 transitions. Second operand 3 states. [2019-11-23 23:38:49,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:49,394 INFO L93 Difference]: Finished difference Result 136445 states and 155579 transitions. [2019-11-23 23:38:49,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:38:49,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 943 [2019-11-23 23:38:49,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:49,468 INFO L225 Difference]: With dead ends: 136445 [2019-11-23 23:38:49,469 INFO L226 Difference]: Without dead ends: 81867 [2019-11-23 23:38:49,503 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 [2019-11-23 23:38:49,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81867 states. [2019-11-23 23:38:50,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81867 to 72013. [2019-11-23 23:38:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72013 states. [2019-11-23 23:38:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72013 states to 72013 states and 80080 transitions. [2019-11-23 23:38:50,057 INFO L78 Accepts]: Start accepts. Automaton has 72013 states and 80080 transitions. Word has length 943 [2019-11-23 23:38:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:50,057 INFO L462 AbstractCegarLoop]: Abstraction has 72013 states and 80080 transitions. [2019-11-23 23:38:50,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:38:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 72013 states and 80080 transitions. [2019-11-23 23:38:50,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1207 [2019-11-23 23:38:50,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:50,087 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:38:50,087 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:50,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:50,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1169650594, now seen corresponding path program 1 times [2019-11-23 23:38:50,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:50,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612068103] [2019-11-23 23:38:50,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 779 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2019-11-23 23:38:53,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612068103] [2019-11-23 23:38:53,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:38:53,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 23:38:53,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541274017] [2019-11-23 23:38:53,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:38:53,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:53,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:38:53,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:38:53,187 INFO L87 Difference]: Start difference. First operand 72013 states and 80080 transitions. Second operand 4 states.