/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_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:38:16,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:38:16,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:38:16,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:38:16,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:38:16,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:38:16,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:38:16,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:38:16,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:38:16,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:38:16,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:38:16,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:38:16,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:38:16,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:38:16,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:38:16,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:38:16,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:38:16,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:38:16,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:38:16,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:38:16,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:38:16,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:38:16,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:38:16,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:38:16,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:38:16,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:38:16,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:38:16,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:38:16,684 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 23:38:16,701 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:38:16,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:38:16,702 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:38:16,703 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:38:16,703 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:38:16,703 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:38:16,703 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:38:16,703 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:38:16,703 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:38:16,704 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:38:16,704 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:38:16,704 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:38:16,704 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:38:16,704 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:38:16,705 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:38:16,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:38:16,706 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:38:16,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:38:16,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:38:16,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:38:16,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:38:16,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:38:16,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:38:16,707 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:38:16,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:38:16,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:38:16,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:38:16,708 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:38:16,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:38:16,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:38:16,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:38:16,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:38:16,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:38:16,709 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:38:16,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:38:16,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:38:16,710 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:38:16,710 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:38:16,984 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:38:16,997 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:38:17,000 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:38:17,002 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:38:17,002 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:38:17,003 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label24.c [2019-11-23 23:38:17,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/634dae97b/9b7e3f97820d43418d4af445fd652df7/FLAGdfedf6aa0 [2019-11-23 23:38:17,860 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:38:17,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label24.c [2019-11-23 23:38:17,893 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/634dae97b/9b7e3f97820d43418d4af445fd652df7/FLAGdfedf6aa0 [2019-11-23 23:38:17,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/634dae97b/9b7e3f97820d43418d4af445fd652df7 [2019-11-23 23:38:17,960 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:38:17,961 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:38:17,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:38:17,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:38:17,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:38:17,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:38:17" (1/1) ... [2019-11-23 23:38:17,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb7bbc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:17, skipping insertion in model container [2019-11-23 23:38:17,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:38:17" (1/1) ... [2019-11-23 23:38:17,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:38:18,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:38:19,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:38:19,671 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:38:20,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:38:20,332 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:38:20,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:20 WrapperNode [2019-11-23 23:38:20,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:38:20,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:38:20,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:38:20,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:38:20,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:20" (1/1) ... [2019-11-23 23:38:20,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:20" (1/1) ... [2019-11-23 23:38:20,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:38:20,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:38:20,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:38:20,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:38:20,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:20" (1/1) ... [2019-11-23 23:38:20,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:20" (1/1) ... [2019-11-23 23:38:20,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:20" (1/1) ... [2019-11-23 23:38:20,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:20" (1/1) ... [2019-11-23 23:38:20,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:20" (1/1) ... [2019-11-23 23:38:20,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:20" (1/1) ... [2019-11-23 23:38:20,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:20" (1/1) ... [2019-11-23 23:38:20,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:38:20,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:38:20,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:38:20,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:38:20,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:20" (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 23:38:20,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:38:20,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:38:26,497 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:38:26,498 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 23:38:26,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:38:26 BoogieIcfgContainer [2019-11-23 23:38:26,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:38:26,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:38:26,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:38:26,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:38:26,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:38:17" (1/3) ... [2019-11-23 23:38:26,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59debdad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:38:26, skipping insertion in model container [2019-11-23 23:38:26,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:20" (2/3) ... [2019-11-23 23:38:26,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59debdad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:38:26, skipping insertion in model container [2019-11-23 23:38:26,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:38:26" (3/3) ... [2019-11-23 23:38:26,510 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label24.c [2019-11-23 23:38:26,519 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:38:26,528 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:38:26,539 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:38:26,583 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:38:26,583 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:38:26,583 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:38:26,583 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:38:26,583 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:38:26,583 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:38:26,584 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:38:26,584 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:38:26,613 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states. [2019-11-23 23:38:26,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2019-11-23 23:38:26,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:26,653 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 23:38:26,653 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:26,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:26,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1870337542, now seen corresponding path program 1 times [2019-11-23 23:38:26,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:26,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823555802] [2019-11-23 23:38:26,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:31,370 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 23:38:31,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823555802] [2019-11-23 23:38:31,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:38:31,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 23:38:31,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406940859] [2019-11-23 23:38:31,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 23:38:31,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:31,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 23:38:31,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:38:31,399 INFO L87 Difference]: Start difference. First operand 763 states. Second operand 5 states. [2019-11-23 23:38:39,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:39,923 INFO L93 Difference]: Finished difference Result 3049 states and 6058 transitions. [2019-11-23 23:38:39,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 23:38:39,925 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 755 [2019-11-23 23:38:39,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:39,965 INFO L225 Difference]: With dead ends: 3049 [2019-11-23 23:38:39,965 INFO L226 Difference]: Without dead ends: 2279 [2019-11-23 23:38:39,972 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 23:38:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2019-11-23 23:38:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2277. [2019-11-23 23:38:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2277 states. [2019-11-23 23:38:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3201 transitions. [2019-11-23 23:38:40,113 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 3201 transitions. Word has length 755 [2019-11-23 23:38:40,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:40,117 INFO L462 AbstractCegarLoop]: Abstraction has 2277 states and 3201 transitions. [2019-11-23 23:38:40,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 23:38:40,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 3201 transitions. [2019-11-23 23:38:40,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2019-11-23 23:38:40,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:40,140 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:38:40,141 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:40,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:40,142 INFO L82 PathProgramCache]: Analyzing trace with hash -854215305, now seen corresponding path program 1 times [2019-11-23 23:38:40,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:40,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630739715] [2019-11-23 23:38:40,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:38:41,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630739715] [2019-11-23 23:38:41,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:38:41,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 23:38:41,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744938453] [2019-11-23 23:38:41,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:38:41,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:41,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:38:41,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:38:41,693 INFO L87 Difference]: Start difference. First operand 2277 states and 3201 transitions. Second operand 4 states. [2019-11-23 23:38:48,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:48,718 INFO L93 Difference]: Finished difference Result 6827 states and 10507 transitions. [2019-11-23 23:38:48,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:38:48,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 770 [2019-11-23 23:38:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:48,751 INFO L225 Difference]: With dead ends: 6827 [2019-11-23 23:38:48,751 INFO L226 Difference]: Without dead ends: 5309 [2019-11-23 23:38:48,754 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 23:38:48,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5309 states. [2019-11-23 23:38:48,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5309 to 5309. [2019-11-23 23:38:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5309 states. [2019-11-23 23:38:48,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5309 states to 5309 states and 7229 transitions. [2019-11-23 23:38:48,866 INFO L78 Accepts]: Start accepts. Automaton has 5309 states and 7229 transitions. Word has length 770 [2019-11-23 23:38:48,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:48,867 INFO L462 AbstractCegarLoop]: Abstraction has 5309 states and 7229 transitions. [2019-11-23 23:38:48,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:38:48,867 INFO L276 IsEmpty]: Start isEmpty. Operand 5309 states and 7229 transitions. [2019-11-23 23:38:48,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2019-11-23 23:38:48,900 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:48,901 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 23:38:48,901 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:48,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:48,902 INFO L82 PathProgramCache]: Analyzing trace with hash 219454023, now seen corresponding path program 1 times [2019-11-23 23:38:48,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:48,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828340402] [2019-11-23 23:38:48,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:50,106 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 23:38:50,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828340402] [2019-11-23 23:38:50,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280340974] [2019-11-23 23:38:50,107 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 23:38:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:50,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:38:50,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:38:51,074 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 23:38:51,075 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:38:51,685 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 23:38:51,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:38:51,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2019-11-23 23:38:51,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046116637] [2019-11-23 23:38:51,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:38:51,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:51,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:38:51,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:38:51,689 INFO L87 Difference]: Start difference. First operand 5309 states and 7229 transitions. Second operand 3 states. [2019-11-23 23:38:55,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:38:55,429 INFO L93 Difference]: Finished difference Result 14407 states and 20156 transitions. [2019-11-23 23:38:55,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:38:55,434 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 777 [2019-11-23 23:38:55,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:38:55,480 INFO L225 Difference]: With dead ends: 14407 [2019-11-23 23:38:55,480 INFO L226 Difference]: Without dead ends: 9857 [2019-11-23 23:38:55,487 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 23:38:55,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9857 states. [2019-11-23 23:38:55,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9857 to 9857. [2019-11-23 23:38:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9857 states. [2019-11-23 23:38:55,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9857 states to 9857 states and 13295 transitions. [2019-11-23 23:38:55,674 INFO L78 Accepts]: Start accepts. Automaton has 9857 states and 13295 transitions. Word has length 777 [2019-11-23 23:38:55,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:38:55,676 INFO L462 AbstractCegarLoop]: Abstraction has 9857 states and 13295 transitions. [2019-11-23 23:38:55,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:38:55,676 INFO L276 IsEmpty]: Start isEmpty. Operand 9857 states and 13295 transitions. [2019-11-23 23:38:55,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2019-11-23 23:38:55,705 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:38:55,705 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:55,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:38:55,909 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:38:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:38:55,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1109468541, now seen corresponding path program 1 times [2019-11-23 23:38:55,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:38:55,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972181274] [2019-11-23 23:38:55,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:38:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:38:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 23:38:56,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972181274] [2019-11-23 23:38:56,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:38:56,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:38:56,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599063608] [2019-11-23 23:38:56,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:38:56,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:38:56,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:38:56,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:38:56,789 INFO L87 Difference]: Start difference. First operand 9857 states and 13295 transitions. Second operand 3 states. [2019-11-23 23:39:01,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:39:01,381 INFO L93 Difference]: Finished difference Result 27293 states and 37536 transitions. [2019-11-23 23:39:01,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:39:01,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 793 [2019-11-23 23:39:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:39:01,441 INFO L225 Difference]: With dead ends: 27293 [2019-11-23 23:39:01,442 INFO L226 Difference]: Without dead ends: 18195 [2019-11-23 23:39:01,457 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 23:39:01,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18195 states. [2019-11-23 23:39:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18195 to 14405. [2019-11-23 23:39:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14405 states. [2019-11-23 23:39:01,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14405 states to 14405 states and 18876 transitions. [2019-11-23 23:39:01,704 INFO L78 Accepts]: Start accepts. Automaton has 14405 states and 18876 transitions. Word has length 793 [2019-11-23 23:39:01,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:39:01,704 INFO L462 AbstractCegarLoop]: Abstraction has 14405 states and 18876 transitions. [2019-11-23 23:39:01,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:39:01,704 INFO L276 IsEmpty]: Start isEmpty. Operand 14405 states and 18876 transitions. [2019-11-23 23:39:01,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2019-11-23 23:39:01,735 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:39:01,736 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:01,736 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:39:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:39:01,737 INFO L82 PathProgramCache]: Analyzing trace with hash -853482680, now seen corresponding path program 1 times [2019-11-23 23:39:01,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:39:01,737 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033997225] [2019-11-23 23:39:01,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:39:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:39:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 23:39:02,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033997225] [2019-11-23 23:39:02,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:39:02,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:39:02,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118332973] [2019-11-23 23:39:02,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:39:02,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:39:02,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:39:02,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:39:02,497 INFO L87 Difference]: Start difference. First operand 14405 states and 18876 transitions. Second operand 4 states. [2019-11-23 23:39:08,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:39:08,538 INFO L93 Difference]: Finished difference Result 37905 states and 49373 transitions. [2019-11-23 23:39:08,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:39:08,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 816 [2019-11-23 23:39:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:39:08,597 INFO L225 Difference]: With dead ends: 37905 [2019-11-23 23:39:08,597 INFO L226 Difference]: Without dead ends: 24259 [2019-11-23 23:39:08,617 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 23:39:08,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24259 states. [2019-11-23 23:39:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24259 to 24259. [2019-11-23 23:39:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24259 states. [2019-11-23 23:39:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24259 states to 24259 states and 29066 transitions. [2019-11-23 23:39:08,931 INFO L78 Accepts]: Start accepts. Automaton has 24259 states and 29066 transitions. Word has length 816 [2019-11-23 23:39:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:39:08,932 INFO L462 AbstractCegarLoop]: Abstraction has 24259 states and 29066 transitions. [2019-11-23 23:39:08,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:39:08,932 INFO L276 IsEmpty]: Start isEmpty. Operand 24259 states and 29066 transitions. [2019-11-23 23:39:08,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2019-11-23 23:39:08,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:39:08,969 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-23 23:39:08,970 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:39:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:39:08,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1150418099, now seen corresponding path program 1 times [2019-11-23 23:39:08,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:39:08,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558150416] [2019-11-23 23:39:08,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:39:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:39:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 91 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-11-23 23:39:09,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558150416] [2019-11-23 23:39:09,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707566891] [2019-11-23 23:39:09,969 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 23:39:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:39:10,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:39:10,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:39:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-23 23:39:10,625 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:39:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-23 23:39:10,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:39:10,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5] total 7 [2019-11-23 23:39:10,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062116596] [2019-11-23 23:39:10,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:39:10,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:39:10,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:39:10,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-23 23:39:10,905 INFO L87 Difference]: Start difference. First operand 24259 states and 29066 transitions. Second operand 4 states. [2019-11-23 23:39:17,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:39:17,699 INFO L93 Difference]: Finished difference Result 77321 states and 94643 transitions. [2019-11-23 23:39:17,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:39:17,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 843 [2019-11-23 23:39:17,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:39:17,788 INFO L225 Difference]: With dead ends: 77321 [2019-11-23 23:39:17,788 INFO L226 Difference]: Without dead ends: 53821 [2019-11-23 23:39:17,826 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1689 GetRequests, 1683 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-23 23:39:17,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53821 states. [2019-11-23 23:39:18,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53821 to 52305. [2019-11-23 23:39:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52305 states. [2019-11-23 23:39:18,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52305 states to 52305 states and 60882 transitions. [2019-11-23 23:39:18,461 INFO L78 Accepts]: Start accepts. Automaton has 52305 states and 60882 transitions. Word has length 843 [2019-11-23 23:39:18,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:39:18,462 INFO L462 AbstractCegarLoop]: Abstraction has 52305 states and 60882 transitions. [2019-11-23 23:39:18,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:39:18,462 INFO L276 IsEmpty]: Start isEmpty. Operand 52305 states and 60882 transitions. [2019-11-23 23:39:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1155 [2019-11-23 23:39:18,546 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:39:18,547 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, 6, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 23:39:18,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:39:18,762 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:39:18,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:39:18,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1807612254, now seen corresponding path program 1 times [2019-11-23 23:39:18,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:39:18,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148007219] [2019-11-23 23:39:18,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:39:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:39:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 341 proven. 0 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2019-11-23 23:39:19,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148007219] [2019-11-23 23:39:19,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:39:19,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:39:19,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362975338] [2019-11-23 23:39:19,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:39:19,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:39:19,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:39:19,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:39:19,948 INFO L87 Difference]: Start difference. First operand 52305 states and 60882 transitions. Second operand 3 states. [2019-11-23 23:39:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:39:24,316 INFO L93 Difference]: Finished difference Result 130381 states and 152869 transitions. [2019-11-23 23:39:24,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:39:24,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1154 [2019-11-23 23:39:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:39:24,394 INFO L225 Difference]: With dead ends: 130381 [2019-11-23 23:39:24,395 INFO L226 Difference]: Without dead ends: 78835 [2019-11-23 23:39:24,440 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 23:39:24,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78835 states. [2019-11-23 23:39:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78835 to 78835. [2019-11-23 23:39:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78835 states. [2019-11-23 23:39:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78835 states to 78835 states and 91312 transitions. [2019-11-23 23:39:25,386 INFO L78 Accepts]: Start accepts. Automaton has 78835 states and 91312 transitions. Word has length 1154 [2019-11-23 23:39:25,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:39:25,386 INFO L462 AbstractCegarLoop]: Abstraction has 78835 states and 91312 transitions. [2019-11-23 23:39:25,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:39:25,387 INFO L276 IsEmpty]: Start isEmpty. Operand 78835 states and 91312 transitions. [2019-11-23 23:39:27,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1180 [2019-11-23 23:39:27,063 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:39:27,065 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 23:39:27,065 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:39:27,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:39:27,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1862462625, now seen corresponding path program 1 times [2019-11-23 23:39:27,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:39:27,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903266886] [2019-11-23 23:39:27,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:39:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:39:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 388 proven. 0 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2019-11-23 23:39:27,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903266886] [2019-11-23 23:39:27,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:39:27,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:39:27,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720598792] [2019-11-23 23:39:27,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:39:27,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:39:27,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:39:27,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:39:27,922 INFO L87 Difference]: Start difference. First operand 78835 states and 91312 transitions. Second operand 3 states. [2019-11-23 23:39:31,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:39:31,994 INFO L93 Difference]: Finished difference Result 156911 states and 181859 transitions. [2019-11-23 23:39:31,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:39:31,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1179 [2019-11-23 23:39:31,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:39:32,073 INFO L225 Difference]: With dead ends: 156911 [2019-11-23 23:39:32,073 INFO L226 Difference]: Without dead ends: 78835