/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:58:17,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:58:17,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:58:17,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:58:17,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:58:17,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:58:17,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:58:17,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:58:17,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:58:17,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:58:17,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:58:17,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:58:17,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:58:17,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:58:17,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:58:17,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:58:17,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:58:17,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:58:17,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:58:17,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:58:17,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:58:17,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:58:17,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:58:17,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:58:17,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:58:17,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:58:17,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:58:17,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:58:17,820 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:58:17,843 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:58:17,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:58:17,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:58:17,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:58:17,846 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:58:17,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:58:17,847 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:58:17,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:58:17,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:58:17,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:58:17,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:58:17,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:58:17,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:58:17,849 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:58:17,850 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:58:17,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:58:17,850 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:58:17,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:58:17,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:58:17,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:58:17,851 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:58:17,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:58:17,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:58:17,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:58:17,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:58:17,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:58:17,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:58:17,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:58:17,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:58:17,853 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:58:18,125 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:58:18,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:58:18,141 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:58:18,143 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:58:18,143 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:58:18,144 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label21.c [2019-11-23 20:58:18,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e4417ea7/a098b727ab76409fbcb860e8af1d8376/FLAGfb6c4fc4b [2019-11-23 20:58:18,986 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:58:18,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label21.c [2019-11-23 20:58:19,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e4417ea7/a098b727ab76409fbcb860e8af1d8376/FLAGfb6c4fc4b [2019-11-23 20:58:19,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e4417ea7/a098b727ab76409fbcb860e8af1d8376 [2019-11-23 20:58:19,053 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:58:19,055 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:58:19,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:58:19,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:58:19,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:58:19,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:58:19" (1/1) ... [2019-11-23 20:58:19,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42c94755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:58:19, skipping insertion in model container [2019-11-23 20:58:19,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:58:19" (1/1) ... [2019-11-23 20:58:19,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:58:19,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:58:20,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:58:20,660 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:58:21,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:58:21,413 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:58:21,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:58:21 WrapperNode [2019-11-23 20:58:21,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:58:21,416 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:58:21,416 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:58:21,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:58:21,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:58:21" (1/1) ... [2019-11-23 20:58:21,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:58:21" (1/1) ... [2019-11-23 20:58:21,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:58:21,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:58:21,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:58:21,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:58:21,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:58:21" (1/1) ... [2019-11-23 20:58:21,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:58:21" (1/1) ... [2019-11-23 20:58:21,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:58:21" (1/1) ... [2019-11-23 20:58:21,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:58:21" (1/1) ... [2019-11-23 20:58:21,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:58:21" (1/1) ... [2019-11-23 20:58:21,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:58:21" (1/1) ... [2019-11-23 20:58:21,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:58:21" (1/1) ... [2019-11-23 20:58:21,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:58:21,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:58:21,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:58:21,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:58:21,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:58:21" (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 20:58:21,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:58:21,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:58:26,570 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:58:26,571 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 20:58:26,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:58:26 BoogieIcfgContainer [2019-11-23 20:58:26,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:58:26,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:58:26,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:58:26,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:58:26,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:58:19" (1/3) ... [2019-11-23 20:58:26,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b376e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:58:26, skipping insertion in model container [2019-11-23 20:58:26,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:58:21" (2/3) ... [2019-11-23 20:58:26,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b376e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:58:26, skipping insertion in model container [2019-11-23 20:58:26,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:58:26" (3/3) ... [2019-11-23 20:58:26,590 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label21.c [2019-11-23 20:58:26,600 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:58:26,609 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:58:26,621 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:58:26,675 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:58:26,675 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:58:26,676 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:58:26,676 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:58:26,676 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:58:26,677 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:58:26,677 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:58:26,677 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:58:26,716 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states. [2019-11-23 20:58:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2019-11-23 20:58:26,772 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:58:26,774 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:26,775 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:58:26,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:58:26,782 INFO L82 PathProgramCache]: Analyzing trace with hash 106763421, now seen corresponding path program 1 times [2019-11-23 20:58:26,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:58:26,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035389872] [2019-11-23 20:58:26,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:58:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:58:29,127 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 20:58:29,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035389872] [2019-11-23 20:58:29,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:58:29,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:58:29,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277510294] [2019-11-23 20:58:29,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:58:29,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:58:29,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:58:29,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:58:29,155 INFO L87 Difference]: Start difference. First operand 885 states. Second operand 3 states. [2019-11-23 20:58:33,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:58:33,858 INFO L93 Difference]: Finished difference Result 2589 states and 5028 transitions. [2019-11-23 20:58:33,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:58:33,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 796 [2019-11-23 20:58:33,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:58:33,915 INFO L225 Difference]: With dead ends: 2589 [2019-11-23 20:58:33,915 INFO L226 Difference]: Without dead ends: 1640 [2019-11-23 20:58:33,930 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 20:58:33,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2019-11-23 20:58:34,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1640. [2019-11-23 20:58:34,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1640 states. [2019-11-23 20:58:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2918 transitions. [2019-11-23 20:58:34,095 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2918 transitions. Word has length 796 [2019-11-23 20:58:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:58:34,098 INFO L462 AbstractCegarLoop]: Abstraction has 1640 states and 2918 transitions. [2019-11-23 20:58:34,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:58:34,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2918 transitions. [2019-11-23 20:58:34,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2019-11-23 20:58:34,135 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:58:34,136 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:34,137 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:58:34,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:58:34,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1032166057, now seen corresponding path program 1 times [2019-11-23 20:58:34,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:58:34,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943882647] [2019-11-23 20:58:34,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:58:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:58:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:58:34,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943882647] [2019-11-23 20:58:34,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:58:34,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:58:34,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72855279] [2019-11-23 20:58:34,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:58:34,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:58:34,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:58:34,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:58:34,761 INFO L87 Difference]: Start difference. First operand 1640 states and 2918 transitions. Second operand 3 states. [2019-11-23 20:58:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:58:39,284 INFO L93 Difference]: Finished difference Result 4914 states and 8749 transitions. [2019-11-23 20:58:39,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:58:39,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 801 [2019-11-23 20:58:39,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:58:39,302 INFO L225 Difference]: With dead ends: 4914 [2019-11-23 20:58:39,302 INFO L226 Difference]: Without dead ends: 3276 [2019-11-23 20:58:39,305 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 20:58:39,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2019-11-23 20:58:39,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 3276. [2019-11-23 20:58:39,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3276 states. [2019-11-23 20:58:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3276 states to 3276 states and 5077 transitions. [2019-11-23 20:58:39,393 INFO L78 Accepts]: Start accepts. Automaton has 3276 states and 5077 transitions. Word has length 801 [2019-11-23 20:58:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:58:39,394 INFO L462 AbstractCegarLoop]: Abstraction has 3276 states and 5077 transitions. [2019-11-23 20:58:39,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:58:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3276 states and 5077 transitions. [2019-11-23 20:58:39,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 819 [2019-11-23 20:58:39,457 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:58:39,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:39,459 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:58:39,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:58:39,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2144875158, now seen corresponding path program 1 times [2019-11-23 20:58:39,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:58:39,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694320820] [2019-11-23 20:58:39,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:58:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:58:41,717 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 20:58:41,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694320820] [2019-11-23 20:58:41,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200086745] [2019-11-23 20:58:41,720 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 20:58:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:58:42,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 20:58:42,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:58:42,648 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 20:58:42,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:58:42,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2019-11-23 20:58:42,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230889963] [2019-11-23 20:58:42,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:58:42,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:58:42,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:58:42,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:58:42,651 INFO L87 Difference]: Start difference. First operand 3276 states and 5077 transitions. Second operand 3 states. [2019-11-23 20:58:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:58:47,078 INFO L93 Difference]: Finished difference Result 9822 states and 15226 transitions. [2019-11-23 20:58:47,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:58:47,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 818 [2019-11-23 20:58:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:58:47,116 INFO L225 Difference]: With dead ends: 9822 [2019-11-23 20:58:47,116 INFO L226 Difference]: Without dead ends: 6548 [2019-11-23 20:58:47,122 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 817 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:58:47,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6548 states. [2019-11-23 20:58:47,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6548 to 6548. [2019-11-23 20:58:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6548 states. [2019-11-23 20:58:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6548 states to 6548 states and 9045 transitions. [2019-11-23 20:58:47,280 INFO L78 Accepts]: Start accepts. Automaton has 6548 states and 9045 transitions. Word has length 818 [2019-11-23 20:58:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:58:47,283 INFO L462 AbstractCegarLoop]: Abstraction has 6548 states and 9045 transitions. [2019-11-23 20:58:47,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:58:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 6548 states and 9045 transitions. [2019-11-23 20:58:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 889 [2019-11-23 20:58:47,315 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:58:47,316 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, 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] [2019-11-23 20:58:47,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:58:47,532 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:58:47,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:58:47,533 INFO L82 PathProgramCache]: Analyzing trace with hash -285608705, now seen corresponding path program 1 times [2019-11-23 20:58:47,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:58:47,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003750696] [2019-11-23 20:58:47,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:58:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:58:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 91 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:58:48,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003750696] [2019-11-23 20:58:48,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527287369] [2019-11-23 20:58:48,502 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 20:58:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:58:48,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 20:58:48,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:58:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-23 20:58:49,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:58:49,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2019-11-23 20:58:49,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316303664] [2019-11-23 20:58:49,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:58:49,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:58:49,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:58:49,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:58:49,632 INFO L87 Difference]: Start difference. First operand 6548 states and 9045 transitions. Second operand 3 states. [2019-11-23 20:58:53,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:58:53,867 INFO L93 Difference]: Finished difference Result 19638 states and 27130 transitions. [2019-11-23 20:58:53,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:58:53,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 888 [2019-11-23 20:58:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:58:53,928 INFO L225 Difference]: With dead ends: 19638 [2019-11-23 20:58:53,928 INFO L226 Difference]: Without dead ends: 13092 [2019-11-23 20:58:53,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 887 SyntacticMatches, 2 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 20:58:53,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13092 states. [2019-11-23 20:58:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13092 to 10638. [2019-11-23 20:58:54,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10638 states. [2019-11-23 20:58:54,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10638 states to 10638 states and 14821 transitions. [2019-11-23 20:58:54,162 INFO L78 Accepts]: Start accepts. Automaton has 10638 states and 14821 transitions. Word has length 888 [2019-11-23 20:58:54,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:58:54,164 INFO L462 AbstractCegarLoop]: Abstraction has 10638 states and 14821 transitions. [2019-11-23 20:58:54,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:58:54,164 INFO L276 IsEmpty]: Start isEmpty. Operand 10638 states and 14821 transitions. [2019-11-23 20:58:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 919 [2019-11-23 20:58:54,199 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:58:54,200 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:54,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:58:54,406 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:58:54,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:58:54,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1635822060, now seen corresponding path program 1 times [2019-11-23 20:58:54,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:58:54,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579094798] [2019-11-23 20:58:54,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:58:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:58:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-23 20:58:55,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579094798] [2019-11-23 20:58:55,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:58:55,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:58:55,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886790] [2019-11-23 20:58:55,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:58:55,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:58:55,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:58:55,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:58:55,261 INFO L87 Difference]: Start difference. First operand 10638 states and 14821 transitions. Second operand 4 states. [2019-11-23 20:59:01,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:59:01,180 INFO L93 Difference]: Finished difference Result 30272 states and 41188 transitions. [2019-11-23 20:59:01,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:59:01,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 918 [2019-11-23 20:59:01,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:59:01,232 INFO L225 Difference]: With dead ends: 30272 [2019-11-23 20:59:01,232 INFO L226 Difference]: Without dead ends: 19636 [2019-11-23 20:59:01,247 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 20:59:01,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19636 states. [2019-11-23 20:59:01,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19636 to 19636. [2019-11-23 20:59:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19636 states. [2019-11-23 20:59:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19636 states to 19636 states and 24185 transitions. [2019-11-23 20:59:01,545 INFO L78 Accepts]: Start accepts. Automaton has 19636 states and 24185 transitions. Word has length 918 [2019-11-23 20:59:01,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:59:01,545 INFO L462 AbstractCegarLoop]: Abstraction has 19636 states and 24185 transitions. [2019-11-23 20:59:01,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:59:01,545 INFO L276 IsEmpty]: Start isEmpty. Operand 19636 states and 24185 transitions. [2019-11-23 20:59:01,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1015 [2019-11-23 20:59:01,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:59:01,586 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:59:01,586 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:59:01,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:59:01,586 INFO L82 PathProgramCache]: Analyzing trace with hash -131132483, now seen corresponding path program 1 times [2019-11-23 20:59:01,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:59:01,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631087715] [2019-11-23 20:59:01,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:59:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:59:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2019-11-23 20:59:02,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631087715] [2019-11-23 20:59:02,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:59:02,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:59:02,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408418211] [2019-11-23 20:59:02,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:59:02,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:59:02,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:59:02,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:59:02,357 INFO L87 Difference]: Start difference. First operand 19636 states and 24185 transitions. Second operand 5 states. [2019-11-23 20:59:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:59:06,760 INFO L93 Difference]: Finished difference Result 40165 states and 49305 transitions. [2019-11-23 20:59:06,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:59:06,763 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1014 [2019-11-23 20:59:06,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:59:06,804 INFO L225 Difference]: With dead ends: 40165 [2019-11-23 20:59:06,804 INFO L226 Difference]: Without dead ends: 20531 [2019-11-23 20:59:06,824 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:59:06,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20531 states. [2019-11-23 20:59:07,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20531 to 20454. [2019-11-23 20:59:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20454 states. [2019-11-23 20:59:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20454 states to 20454 states and 25009 transitions. [2019-11-23 20:59:07,113 INFO L78 Accepts]: Start accepts. Automaton has 20454 states and 25009 transitions. Word has length 1014 [2019-11-23 20:59:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:59:07,114 INFO L462 AbstractCegarLoop]: Abstraction has 20454 states and 25009 transitions. [2019-11-23 20:59:07,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:59:07,114 INFO L276 IsEmpty]: Start isEmpty. Operand 20454 states and 25009 transitions. [2019-11-23 20:59:07,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1030 [2019-11-23 20:59:07,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:59:07,176 INFO L410 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-23 20:59:07,177 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:59:07,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:59:07,178 INFO L82 PathProgramCache]: Analyzing trace with hash -874255778, now seen corresponding path program 1 times [2019-11-23 20:59:07,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:59:07,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92945486] [2019-11-23 20:59:07,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:59:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:59:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 281 proven. 0 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2019-11-23 20:59:07,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92945486] [2019-11-23 20:59:07,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:59:07,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:59:07,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811466290] [2019-11-23 20:59:07,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:59:07,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:59:07,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:59:07,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:59:07,926 INFO L87 Difference]: Start difference. First operand 20454 states and 25009 transitions. Second operand 4 states. [2019-11-23 20:59:14,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:59:14,968 INFO L93 Difference]: Finished difference Result 76898 states and 94856 transitions. [2019-11-23 20:59:14,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:59:14,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1029 [2019-11-23 20:59:14,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:59:15,062 INFO L225 Difference]: With dead ends: 76898 [2019-11-23 20:59:15,062 INFO L226 Difference]: Without dead ends: 57264 [2019-11-23 20:59:15,090 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 20:59:15,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57264 states. [2019-11-23 20:59:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57264 to 57264. [2019-11-23 20:59:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57264 states. [2019-11-23 20:59:15,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57264 states to 57264 states and 68821 transitions. [2019-11-23 20:59:15,926 INFO L78 Accepts]: Start accepts. Automaton has 57264 states and 68821 transitions. Word has length 1029 [2019-11-23 20:59:15,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:59:15,926 INFO L462 AbstractCegarLoop]: Abstraction has 57264 states and 68821 transitions. [2019-11-23 20:59:15,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:59:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 57264 states and 68821 transitions. [2019-11-23 20:59:15,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1062 [2019-11-23 20:59:15,982 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:59:15,983 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, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:59:15,984 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:59:15,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:59:15,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1495547421, now seen corresponding path program 1 times [2019-11-23 20:59:15,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:59:15,985 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085976280] [2019-11-23 20:59:15,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:59:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:59:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 342 proven. 3 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2019-11-23 20:59:16,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085976280] [2019-11-23 20:59:16,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683794622] [2019-11-23 20:59:16,831 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 20:59:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:59:17,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 1337 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 20:59:17,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:59:18,380 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2019-11-23 20:59:18,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:59:18,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2019-11-23 20:59:18,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565604720] [2019-11-23 20:59:18,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:59:18,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:59:18,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:59:18,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:59:18,385 INFO L87 Difference]: Start difference. First operand 57264 states and 68821 transitions. Second operand 3 states. [2019-11-23 20:59:23,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:59:23,438 INFO L93 Difference]: Finished difference Result 151336 states and 182437 transitions. [2019-11-23 20:59:23,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:59:23,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1061 [2019-11-23 20:59:23,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:59:23,545 INFO L225 Difference]: With dead ends: 151336 [2019-11-23 20:59:23,545 INFO L226 Difference]: Without dead ends: 94892 [2019-11-23 20:59:23,608 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1065 GetRequests, 1060 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 20:59:23,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94892 states. [2019-11-23 20:59:24,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94892 to 83440. [2019-11-23 20:59:24,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83440 states. [2019-11-23 20:59:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83440 states to 83440 states and 99576 transitions. [2019-11-23 20:59:24,485 INFO L78 Accepts]: Start accepts. Automaton has 83440 states and 99576 transitions. Word has length 1061 [2019-11-23 20:59:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:59:24,486 INFO L462 AbstractCegarLoop]: Abstraction has 83440 states and 99576 transitions. [2019-11-23 20:59:24,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:59:24,486 INFO L276 IsEmpty]: Start isEmpty. Operand 83440 states and 99576 transitions. [2019-11-23 20:59:26,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1185 [2019-11-23 20:59:26,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:59:26,099 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 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, 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, 3, 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] [2019-11-23 20:59:26,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:59:26,303 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:59:26,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:59:26,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1644462899, now seen corresponding path program 1 times [2019-11-23 20:59:26,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:59:26,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188908768] [2019-11-23 20:59:26,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:59:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:59:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 457 proven. 0 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2019-11-23 20:59:27,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188908768] [2019-11-23 20:59:27,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:59:27,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:59:27,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576447717] [2019-11-23 20:59:27,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:59:27,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:59:27,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:59:27,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:59:27,439 INFO L87 Difference]: Start difference. First operand 83440 states and 99576 transitions. Second operand 5 states.