/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_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:37:48,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:37:48,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:37:48,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:37:48,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:37:48,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:37:48,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:37:48,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:37:48,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:37:48,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:37:48,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:37:48,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:37:48,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:37:48,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:37:48,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:37:48,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:37:48,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:37:48,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:37:48,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:37:48,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:37:48,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:37:48,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:37:48,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:37:48,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:37:48,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:37:48,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 23:37:48,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 23:37:48,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 23:37:48,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 23:37:48,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 23:37:48,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 23:37:48,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 23:37:48,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 23:37:48,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:37:48,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:37:48,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:37:48,564 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 23:37:48,579 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:37:48,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:37:48,580 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:37:48,581 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:37:48,581 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:37:48,581 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:37:48,581 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:37:48,581 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:37:48,582 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:37:48,582 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:37:48,582 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:37:48,582 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:37:48,583 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:37:48,583 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:37:48,583 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:37:48,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:37:48,584 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:37:48,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:37:48,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:37:48,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:37:48,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:37:48,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:37:48,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:37:48,585 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:37:48,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:37:48,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:37:48,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:37:48,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:37:48,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:37:48,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:37:48,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:37:48,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:37:48,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:37:48,587 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:37:48,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:37:48,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:37:48,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:37:48,588 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:37:48,851 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:37:48,864 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:37:48,868 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:37:48,869 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:37:48,870 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:37:48,870 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label22.c [2019-11-23 23:37:48,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dcaaff20/ef4d0db46d804d4fb154788c103c018a/FLAG8837d7a82 [2019-11-23 23:37:49,769 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:37:49,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label22.c [2019-11-23 23:37:49,813 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dcaaff20/ef4d0db46d804d4fb154788c103c018a/FLAG8837d7a82 [2019-11-23 23:37:50,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dcaaff20/ef4d0db46d804d4fb154788c103c018a [2019-11-23 23:37:50,316 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:37:50,318 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:37:50,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:37:50,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:37:50,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:37:50,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:37:50" (1/1) ... [2019-11-23 23:37:50,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4096ed7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:50, skipping insertion in model container [2019-11-23 23:37:50,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:37:50" (1/1) ... [2019-11-23 23:37:50,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:37:50,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:37:51,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:37:51,860 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:37:52,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:37:52,513 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:37:52,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:52 WrapperNode [2019-11-23 23:37:52,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:37:52,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:37:52,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:37:52,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:37:52,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:52" (1/1) ... [2019-11-23 23:37:52,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:52" (1/1) ... [2019-11-23 23:37:52,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:37:52,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:37:52,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:37:52,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:37:52,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:52" (1/1) ... [2019-11-23 23:37:52,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:52" (1/1) ... [2019-11-23 23:37:52,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:52" (1/1) ... [2019-11-23 23:37:52,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:52" (1/1) ... [2019-11-23 23:37:52,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:52" (1/1) ... [2019-11-23 23:37:52,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:52" (1/1) ... [2019-11-23 23:37:52,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:52" (1/1) ... [2019-11-23 23:37:53,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:37:53,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:37:53,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:37:53,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:37:53,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:52" (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 23:37:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:37:53,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:37:58,594 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:37:58,595 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 23:37:58,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:37:58 BoogieIcfgContainer [2019-11-23 23:37:58,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:37:58,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:37:58,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:37:58,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:37:58,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:37:50" (1/3) ... [2019-11-23 23:37:58,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9036e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:37:58, skipping insertion in model container [2019-11-23 23:37:58,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:52" (2/3) ... [2019-11-23 23:37:58,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9036e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:37:58, skipping insertion in model container [2019-11-23 23:37:58,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:37:58" (3/3) ... [2019-11-23 23:37:58,614 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label22.c [2019-11-23 23:37:58,626 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:37:58,640 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:37:58,655 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:37:58,716 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:37:58,716 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:37:58,716 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:37:58,716 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:37:58,716 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:37:58,716 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:37:58,717 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:37:58,717 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:37:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states. [2019-11-23 23:37:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2019-11-23 23:37:58,811 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:37:58,813 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 23:37:58,814 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:37:58,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:37:58,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1870332099, now seen corresponding path program 1 times [2019-11-23 23:37:58,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:37:58,834 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848211169] [2019-11-23 23:37:58,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:37:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:03,590 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 23:38:03,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848211169] [2019-11-23 23:38:03,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:38:03,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 23:38:03,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220854480] [2019-11-23 23:38:03,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 23:38:03,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:03,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 23:38:03,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:38:03,618 INFO L87 Difference]: Start difference. First operand 763 states. Second operand 5 states. [2019-11-23 23:38:11,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:11,142 INFO L93 Difference]: Finished difference Result 3049 states and 6058 transitions. [2019-11-23 23:38:11,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 23:38:11,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 755 [2019-11-23 23:38:11,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:11,215 INFO L225 Difference]: With dead ends: 3049 [2019-11-23 23:38:11,215 INFO L226 Difference]: Without dead ends: 2279 [2019-11-23 23:38:11,230 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 15 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:38:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2019-11-23 23:38:11,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2277. [2019-11-23 23:38:11,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2277 states. [2019-11-23 23:38:11,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3375 transitions. [2019-11-23 23:38:11,405 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 3375 transitions. Word has length 755 [2019-11-23 23:38:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:11,408 INFO L462 AbstractCegarLoop]: Abstraction has 2277 states and 3375 transitions. [2019-11-23 23:38:11,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 23:38:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 3375 transitions. [2019-11-23 23:38:11,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2019-11-23 23:38:11,432 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:11,432 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:11,433 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:11,434 INFO L82 PathProgramCache]: Analyzing trace with hash 219459466, now seen corresponding path program 1 times [2019-11-23 23:38:11,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:11,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018062230] [2019-11-23 23:38:11,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 23:38:12,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018062230] [2019-11-23 23:38:12,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033216470] [2019-11-23 23:38:12,824 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 23:38:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:13,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:38:13,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:38:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 23:38:13,587 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:38:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 23:38:13,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:38:13,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2019-11-23 23:38:13,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727615947] [2019-11-23 23:38:13,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:38:13,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:13,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:38:13,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:38:13,990 INFO L87 Difference]: Start difference. First operand 2277 states and 3375 transitions. Second operand 3 states. [2019-11-23 23:38:18,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:18,105 INFO L93 Difference]: Finished difference Result 5311 states and 8594 transitions. [2019-11-23 23:38:18,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:38:18,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 777 [2019-11-23 23:38:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:18,128 INFO L225 Difference]: With dead ends: 5311 [2019-11-23 23:38:18,128 INFO L226 Difference]: Without dead ends: 3793 [2019-11-23 23:38:18,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1556 GetRequests, 1551 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:38:18,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3793 states. [2019-11-23 23:38:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 3793. [2019-11-23 23:38:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3793 states. [2019-11-23 23:38:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 5707 transitions. [2019-11-23 23:38:18,219 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 5707 transitions. Word has length 777 [2019-11-23 23:38:18,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:18,221 INFO L462 AbstractCegarLoop]: Abstraction has 3793 states and 5707 transitions. [2019-11-23 23:38:18,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:38:18,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 5707 transitions. [2019-11-23 23:38:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2019-11-23 23:38:18,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:18,252 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:18,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:38:18,465 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:18,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:18,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1422759421, now seen corresponding path program 1 times [2019-11-23 23:38:18,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:18,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970133866] [2019-11-23 23:38:18,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 23:38:19,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970133866] [2019-11-23 23:38:19,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:38:19,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:38:19,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953680333] [2019-11-23 23:38:19,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:38:19,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:19,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:38:19,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:38:19,190 INFO L87 Difference]: Start difference. First operand 3793 states and 5707 transitions. Second operand 3 states. [2019-11-23 23:38:23,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:23,195 INFO L93 Difference]: Finished difference Result 9859 states and 15590 transitions. [2019-11-23 23:38:23,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:38:23,195 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 835 [2019-11-23 23:38:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:23,225 INFO L225 Difference]: With dead ends: 9859 [2019-11-23 23:38:23,225 INFO L226 Difference]: Without dead ends: 6825 [2019-11-23 23:38:23,230 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 2 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 23:38:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6825 states. [2019-11-23 23:38:23,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6825 to 6825. [2019-11-23 23:38:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6825 states. [2019-11-23 23:38:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6825 states to 6825 states and 9495 transitions. [2019-11-23 23:38:23,354 INFO L78 Accepts]: Start accepts. Automaton has 6825 states and 9495 transitions. Word has length 835 [2019-11-23 23:38:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:23,355 INFO L462 AbstractCegarLoop]: Abstraction has 6825 states and 9495 transitions. [2019-11-23 23:38:23,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:38:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 6825 states and 9495 transitions. [2019-11-23 23:38:23,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 851 [2019-11-23 23:38:23,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:23,377 INFO L410 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 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 23:38:23,377 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:23,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:23,378 INFO L82 PathProgramCache]: Analyzing trace with hash 828081850, now seen corresponding path program 1 times [2019-11-23 23:38:23,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:23,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834918131] [2019-11-23 23:38:23,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-23 23:38:24,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834918131] [2019-11-23 23:38:24,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:38:24,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:38:24,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049646977] [2019-11-23 23:38:24,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:38:24,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:24,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:38:24,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:38:24,043 INFO L87 Difference]: Start difference. First operand 6825 states and 9495 transitions. Second operand 3 states. [2019-11-23 23:38:28,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:28,148 INFO L93 Difference]: Finished difference Result 15923 states and 22409 transitions. [2019-11-23 23:38:28,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:38:28,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 850 [2019-11-23 23:38:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:28,183 INFO L225 Difference]: With dead ends: 15923 [2019-11-23 23:38:28,184 INFO L226 Difference]: Without dead ends: 9857 [2019-11-23 23:38:28,191 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 23:38:28,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9857 states. [2019-11-23 23:38:28,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9857 to 9857. [2019-11-23 23:38:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9857 states. [2019-11-23 23:38:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9857 states to 9857 states and 12869 transitions. [2019-11-23 23:38:28,347 INFO L78 Accepts]: Start accepts. Automaton has 9857 states and 12869 transitions. Word has length 850 [2019-11-23 23:38:28,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:28,347 INFO L462 AbstractCegarLoop]: Abstraction has 9857 states and 12869 transitions. [2019-11-23 23:38:28,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:38:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 9857 states and 12869 transitions. [2019-11-23 23:38:28,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 858 [2019-11-23 23:38:28,374 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:28,375 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 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 23:38:28,375 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:28,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:28,376 INFO L82 PathProgramCache]: Analyzing trace with hash 948456330, now seen corresponding path program 1 times [2019-11-23 23:38:28,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:28,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297909705] [2019-11-23 23:38:28,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-23 23:38:28,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297909705] [2019-11-23 23:38:28,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:38:28,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:38:28,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7822590] [2019-11-23 23:38:28,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:38:28,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:28,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:38:28,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:38:28,805 INFO L87 Difference]: Start difference. First operand 9857 states and 12869 transitions. Second operand 3 states. [2019-11-23 23:38:33,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:33,180 INFO L93 Difference]: Finished difference Result 23503 states and 31580 transitions. [2019-11-23 23:38:33,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:38:33,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 857 [2019-11-23 23:38:33,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:33,259 INFO L225 Difference]: With dead ends: 23503 [2019-11-23 23:38:33,259 INFO L226 Difference]: Without dead ends: 14405 [2019-11-23 23:38:33,275 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 23:38:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14405 states. [2019-11-23 23:38:33,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14405 to 14405. [2019-11-23 23:38:33,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14405 states. [2019-11-23 23:38:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14405 states to 14405 states and 18131 transitions. [2019-11-23 23:38:33,503 INFO L78 Accepts]: Start accepts. Automaton has 14405 states and 18131 transitions. Word has length 857 [2019-11-23 23:38:33,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:33,504 INFO L462 AbstractCegarLoop]: Abstraction has 14405 states and 18131 transitions. [2019-11-23 23:38:33,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:38:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand 14405 states and 18131 transitions. [2019-11-23 23:38:33,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859 [2019-11-23 23:38:33,545 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:33,546 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:33,547 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:33,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:33,547 INFO L82 PathProgramCache]: Analyzing trace with hash -978703066, now seen corresponding path program 1 times [2019-11-23 23:38:33,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:33,548 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342639748] [2019-11-23 23:38:33,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 23:38:34,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342639748] [2019-11-23 23:38:34,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516199784] [2019-11-23 23:38:34,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:38:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:34,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:38:34,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:38:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 23:38:35,147 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:38:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 23:38:35,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:38:35,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2019-11-23 23:38:35,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103104653] [2019-11-23 23:38:35,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:38:35,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:35,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:38:35,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:38:35,629 INFO L87 Difference]: Start difference. First operand 14405 states and 18131 transitions. Second operand 3 states. [2019-11-23 23:38:39,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:39,900 INFO L93 Difference]: Finished difference Result 40179 states and 51244 transitions. [2019-11-23 23:38:39,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:38:39,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 858 [2019-11-23 23:38:39,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:39,966 INFO L225 Difference]: With dead ends: 40179 [2019-11-23 23:38:39,967 INFO L226 Difference]: Without dead ends: 26533 [2019-11-23 23:38:39,991 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1718 GetRequests, 1714 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:38:40,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26533 states. [2019-11-23 23:38:40,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26533 to 26533. [2019-11-23 23:38:40,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26533 states. [2019-11-23 23:38:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26533 states to 26533 states and 31862 transitions. [2019-11-23 23:38:40,399 INFO L78 Accepts]: Start accepts. Automaton has 26533 states and 31862 transitions. Word has length 858 [2019-11-23 23:38:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:40,399 INFO L462 AbstractCegarLoop]: Abstraction has 26533 states and 31862 transitions. [2019-11-23 23:38:40,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:38:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 26533 states and 31862 transitions. [2019-11-23 23:38:40,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2019-11-23 23:38:40,440 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:40,441 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-11-23 23:38:40,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:38:40,646 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:40,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1673286884, now seen corresponding path program 1 times [2019-11-23 23:38:40,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:40,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919293120] [2019-11-23 23:38:40,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 23:38:41,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919293120] [2019-11-23 23:38:41,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792003331] [2019-11-23 23:38:41,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:38:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:41,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 1142 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:38:42,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:38:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-11-23 23:38:42,806 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:38:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-11-23 23:38:43,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:38:43,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2019-11-23 23:38:43,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389853795] [2019-11-23 23:38:43,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:38:43,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:43,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:38:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:38:43,305 INFO L87 Difference]: Start difference. First operand 26533 states and 31862 transitions. Second operand 3 states. [2019-11-23 23:38:47,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:47,463 INFO L93 Difference]: Finished difference Result 73531 states and 88973 transitions. [2019-11-23 23:38:47,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:38:47,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 910 [2019-11-23 23:38:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:47,553 INFO L225 Difference]: With dead ends: 73531 [2019-11-23 23:38:47,554 INFO L226 Difference]: Without dead ends: 47757 [2019-11-23 23:38:47,591 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1822 GetRequests, 1817 SyntacticMatches, 2 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 23:38:47,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47757 states. [2019-11-23 23:38:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47757 to 46999. [2019-11-23 23:38:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46999 states. [2019-11-23 23:38:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46999 states to 46999 states and 54218 transitions. [2019-11-23 23:38:48,206 INFO L78 Accepts]: Start accepts. Automaton has 46999 states and 54218 transitions. Word has length 910 [2019-11-23 23:38:48,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:48,206 INFO L462 AbstractCegarLoop]: Abstraction has 46999 states and 54218 transitions. [2019-11-23 23:38:48,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:38:48,207 INFO L276 IsEmpty]: Start isEmpty. Operand 46999 states and 54218 transitions. [2019-11-23 23:38:48,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 975 [2019-11-23 23:38:48,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:48,257 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 23:38:48,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:38:48,462 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:48,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:48,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1403754755, now seen corresponding path program 1 times [2019-11-23 23:38:48,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:48,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436473930] [2019-11-23 23:38:48,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 23:38:49,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436473930] [2019-11-23 23:38:49,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:38:49,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:38:49,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353285815] [2019-11-23 23:38:49,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:38:49,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:49,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:38:49,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:38:49,371 INFO L87 Difference]: Start difference. First operand 46999 states and 54218 transitions. Second operand 3 states. [2019-11-23 23:38:53,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:53,615 INFO L93 Difference]: Finished difference Result 110673 states and 129703 transitions. [2019-11-23 23:38:53,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:38:53,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 974 [2019-11-23 23:38:53,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:53,731 INFO L225 Difference]: With dead ends: 110673 [2019-11-23 23:38:53,731 INFO L226 Difference]: Without dead ends: 60643 [2019-11-23 23:38:53,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 23:38:53,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60643 states. [2019-11-23 23:38:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60643 to 56853. [2019-11-23 23:38:54,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56853 states. [2019-11-23 23:38:54,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56853 states to 56853 states and 64531 transitions. [2019-11-23 23:38:54,614 INFO L78 Accepts]: Start accepts. Automaton has 56853 states and 64531 transitions. Word has length 974 [2019-11-23 23:38:54,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:54,614 INFO L462 AbstractCegarLoop]: Abstraction has 56853 states and 64531 transitions. [2019-11-23 23:38:54,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:38:54,615 INFO L276 IsEmpty]: Start isEmpty. Operand 56853 states and 64531 transitions. [2019-11-23 23:38:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1003 [2019-11-23 23:38:54,652 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:54,653 INFO L410 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 23:38:54,654 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:54,654 INFO L82 PathProgramCache]: Analyzing trace with hash -86168930, now seen corresponding path program 1 times [2019-11-23 23:38:54,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:54,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4742163] [2019-11-23 23:38:54,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2019-11-23 23:38:55,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4742163] [2019-11-23 23:38:55,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:38:55,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:38:55,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842314781] [2019-11-23 23:38:55,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:38:55,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:55,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:38:55,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:38:55,282 INFO L87 Difference]: Start difference. First operand 56853 states and 64531 transitions. Second operand 3 states. [2019-11-23 23:39:00,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:39:00,343 INFO L93 Difference]: Finished difference Result 124317 states and 141762 transitions. [2019-11-23 23:39:00,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:39:00,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1002 [2019-11-23 23:39:00,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:39:00,426 INFO L225 Difference]: With dead ends: 124317 [2019-11-23 23:39:00,426 INFO L226 Difference]: Without dead ends: 67465 [2019-11-23 23:39:00,463 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 2 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 23:39:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67465 states. [2019-11-23 23:39:00,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67465 to 67465. [2019-11-23 23:39:00,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67465 states. [2019-11-23 23:39:01,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67465 states to 67465 states and 75962 transitions. [2019-11-23 23:39:01,042 INFO L78 Accepts]: Start accepts. Automaton has 67465 states and 75962 transitions. Word has length 1002 [2019-11-23 23:39:01,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:39:01,043 INFO L462 AbstractCegarLoop]: Abstraction has 67465 states and 75962 transitions. [2019-11-23 23:39:01,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:39:01,043 INFO L276 IsEmpty]: Start isEmpty. Operand 67465 states and 75962 transitions. [2019-11-23 23:39:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1047 [2019-11-23 23:39:01,087 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:39:01,088 INFO L410 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-23 23:39:01,088 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:39:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:39:01,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1146856585, now seen corresponding path program 1 times [2019-11-23 23:39:01,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:39:01,089 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143654198] [2019-11-23 23:39:01,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:39:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:39:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 365 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2019-11-23 23:39:01,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143654198] [2019-11-23 23:39:01,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:39:01,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 23:39:01,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319511751] [2019-11-23 23:39:01,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:39:01,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:39:01,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:39:01,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:39:01,965 INFO L87 Difference]: Start difference. First operand 67465 states and 75962 transitions. Second operand 4 states.