./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a66c471884095e28475dea267af4dc4d2e968c34cd7e27899ae6a5f02624299e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:40:03,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:40:03,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:40:03,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:40:03,028 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:40:03,029 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:40:03,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:40:03,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:40:03,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:40:03,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:40:03,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:40:03,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:40:03,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:40:03,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:40:03,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:40:03,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:40:03,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:40:03,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:40:03,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:40:03,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:40:03,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:40:03,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:40:03,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:40:03,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:40:03,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:40:03,062 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:40:03,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:40:03,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:40:03,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:40:03,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:40:03,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:40:03,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:40:03,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:40:03,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:40:03,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:40:03,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:40:03,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:40:03,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:40:03,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:40:03,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:40:03,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:40:03,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:40:03,083 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:40:03,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:40:03,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:40:03,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:40:03,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:40:03,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:40:03,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:40:03,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:40:03,085 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:40:03,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:40:03,085 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:40:03,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:40:03,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:40:03,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:40:03,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:40:03,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:40:03,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:40:03,086 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:40:03,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:40:03,087 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:40:03,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:40:03,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:40:03,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:40:03,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:40:03,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:40:03,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:40:03,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:40:03,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:40:03,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:40:03,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:40:03,088 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:40:03,088 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:40:03,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:40:03,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:40:03,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a66c471884095e28475dea267af4dc4d2e968c34cd7e27899ae6a5f02624299e [2021-12-21 13:40:03,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:40:03,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:40:03,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:40:03,308 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:40:03,308 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:40:03,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-12-21 13:40:03,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03471b618/bbd5ea547a2d4da7bffd35c2ebe70615/FLAGd26d873bd [2021-12-21 13:40:03,817 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:40:03,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-12-21 13:40:03,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03471b618/bbd5ea547a2d4da7bffd35c2ebe70615/FLAGd26d873bd [2021-12-21 13:40:04,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03471b618/bbd5ea547a2d4da7bffd35c2ebe70615 [2021-12-21 13:40:04,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:40:04,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:40:04,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:40:04,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:40:04,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:40:04,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:40:04" (1/1) ... [2021-12-21 13:40:04,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43929da7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:04, skipping insertion in model container [2021-12-21 13:40:04,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:40:04" (1/1) ... [2021-12-21 13:40:04,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:40:04,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:40:04,766 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[31375,31388] [2021-12-21 13:40:04,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:40:04,862 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:40:05,088 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[31375,31388] [2021-12-21 13:40:05,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:40:05,188 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:40:05,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:05 WrapperNode [2021-12-21 13:40:05,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:40:05,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:40:05,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:40:05,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:40:05,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:05" (1/1) ... [2021-12-21 13:40:05,222 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:05" (1/1) ... [2021-12-21 13:40:05,280 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2655 [2021-12-21 13:40:05,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:40:05,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:40:05,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:40:05,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:40:05,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:05" (1/1) ... [2021-12-21 13:40:05,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:05" (1/1) ... [2021-12-21 13:40:05,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:05" (1/1) ... [2021-12-21 13:40:05,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:05" (1/1) ... [2021-12-21 13:40:05,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:05" (1/1) ... [2021-12-21 13:40:05,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:05" (1/1) ... [2021-12-21 13:40:05,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:05" (1/1) ... [2021-12-21 13:40:05,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:40:05,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:40:05,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:40:05,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:40:05,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:05" (1/1) ... [2021-12-21 13:40:05,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:40:05,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:40:05,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 13:40:05,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 13:40:05,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:40:05,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:40:05,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:40:05,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:40:05,589 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:40:05,591 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:40:06,777 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:40:06,788 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:40:06,789 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 13:40:06,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:40:06 BoogieIcfgContainer [2021-12-21 13:40:06,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:40:06,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:40:06,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:40:06,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:40:06,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:40:04" (1/3) ... [2021-12-21 13:40:06,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f8a10e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:40:06, skipping insertion in model container [2021-12-21 13:40:06,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:40:05" (2/3) ... [2021-12-21 13:40:06,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f8a10e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:40:06, skipping insertion in model container [2021-12-21 13:40:06,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:40:06" (3/3) ... [2021-12-21 13:40:06,797 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-12-21 13:40:06,800 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:40:06,800 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:40:06,833 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:40:06,839 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 13:40:06,840 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:40:06,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 703 states, 701 states have (on average 1.7931526390870185) internal successors, (1257), 702 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:06,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-12-21 13:40:06,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:06,892 INFO L514 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] [2021-12-21 13:40:06,893 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:06,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:06,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1147450978, now seen corresponding path program 1 times [2021-12-21 13:40:06,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:06,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226210610] [2021-12-21 13:40:06,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:06,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:07,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:07,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226210610] [2021-12-21 13:40:07,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226210610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:07,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:07,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:07,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800660902] [2021-12-21 13:40:07,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:07,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:07,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:07,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:07,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:07,502 INFO L87 Difference]: Start difference. First operand has 703 states, 701 states have (on average 1.7931526390870185) internal successors, (1257), 702 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:07,700 INFO L93 Difference]: Finished difference Result 1303 states and 2316 transitions. [2021-12-21 13:40:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:07,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2021-12-21 13:40:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:07,721 INFO L225 Difference]: With dead ends: 1303 [2021-12-21 13:40:07,722 INFO L226 Difference]: Without dead ends: 1122 [2021-12-21 13:40:07,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:07,732 INFO L933 BasicCegarLoop]: 1205 mSDtfsCounter, 727 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 2223 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:40:07,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 2223 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:40:07,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-12-21 13:40:07,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1120. [2021-12-21 13:40:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 1.5558534405719393) internal successors, (1741), 1119 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1741 transitions. [2021-12-21 13:40:07,819 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1741 transitions. Word has length 300 [2021-12-21 13:40:07,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:07,821 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1741 transitions. [2021-12-21 13:40:07,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:07,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1741 transitions. [2021-12-21 13:40:07,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-12-21 13:40:07,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:07,826 INFO L514 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] [2021-12-21 13:40:07,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:40:07,827 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:07,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:07,829 INFO L85 PathProgramCache]: Analyzing trace with hash -273904988, now seen corresponding path program 1 times [2021-12-21 13:40:07,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:07,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706089486] [2021-12-21 13:40:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:07,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:08,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:08,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706089486] [2021-12-21 13:40:08,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706089486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:08,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:08,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:08,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95827296] [2021-12-21 13:40:08,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:08,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:08,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:08,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:08,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:08,081 INFO L87 Difference]: Start difference. First operand 1120 states and 1741 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:08,223 INFO L93 Difference]: Finished difference Result 2232 states and 3496 transitions. [2021-12-21 13:40:08,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:08,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2021-12-21 13:40:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:08,232 INFO L225 Difference]: With dead ends: 2232 [2021-12-21 13:40:08,232 INFO L226 Difference]: Without dead ends: 1930 [2021-12-21 13:40:08,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:08,240 INFO L933 BasicCegarLoop]: 1028 mSDtfsCounter, 574 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:40:08,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 1889 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:40:08,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2021-12-21 13:40:08,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2021-12-21 13:40:08,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 1.5490399584846912) internal successors, (2985), 1927 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2985 transitions. [2021-12-21 13:40:08,314 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2985 transitions. Word has length 300 [2021-12-21 13:40:08,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:08,315 INFO L470 AbstractCegarLoop]: Abstraction has 1928 states and 2985 transitions. [2021-12-21 13:40:08,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:08,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2985 transitions. [2021-12-21 13:40:08,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-12-21 13:40:08,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:08,321 INFO L514 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] [2021-12-21 13:40:08,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:40:08,322 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:08,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:08,323 INFO L85 PathProgramCache]: Analyzing trace with hash -852042622, now seen corresponding path program 1 times [2021-12-21 13:40:08,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:08,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100241202] [2021-12-21 13:40:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:08,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:08,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:08,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100241202] [2021-12-21 13:40:08,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100241202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:08,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:08,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:08,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162146771] [2021-12-21 13:40:08,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:08,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:08,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:08,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:08,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:08,477 INFO L87 Difference]: Start difference. First operand 1928 states and 2985 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:08,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:08,654 INFO L93 Difference]: Finished difference Result 4076 states and 6363 transitions. [2021-12-21 13:40:08,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:08,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2021-12-21 13:40:08,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:08,666 INFO L225 Difference]: With dead ends: 4076 [2021-12-21 13:40:08,666 INFO L226 Difference]: Without dead ends: 3514 [2021-12-21 13:40:08,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:08,669 INFO L933 BasicCegarLoop]: 1028 mSDtfsCounter, 567 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:40:08,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 1876 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:40:08,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2021-12-21 13:40:08,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 3512. [2021-12-21 13:40:08,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3512 states, 3511 states have (on average 1.541726003987468) internal successors, (5413), 3511 states have internal predecessors, (5413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3512 states to 3512 states and 5413 transitions. [2021-12-21 13:40:08,817 INFO L78 Accepts]: Start accepts. Automaton has 3512 states and 5413 transitions. Word has length 300 [2021-12-21 13:40:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:08,817 INFO L470 AbstractCegarLoop]: Abstraction has 3512 states and 5413 transitions. [2021-12-21 13:40:08,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:08,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3512 states and 5413 transitions. [2021-12-21 13:40:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-12-21 13:40:08,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:08,824 INFO L514 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] [2021-12-21 13:40:08,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:40:08,825 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:08,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:08,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1348510954, now seen corresponding path program 1 times [2021-12-21 13:40:08,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:08,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762390585] [2021-12-21 13:40:08,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:08,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:09,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:09,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762390585] [2021-12-21 13:40:09,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762390585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:09,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:09,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:40:09,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700196973] [2021-12-21 13:40:09,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:09,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:40:09,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:09,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:40:09,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:40:09,207 INFO L87 Difference]: Start difference. First operand 3512 states and 5413 transitions. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:09,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:09,657 INFO L93 Difference]: Finished difference Result 10422 states and 16050 transitions. [2021-12-21 13:40:09,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:40:09,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2021-12-21 13:40:09,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:09,680 INFO L225 Difference]: With dead ends: 10422 [2021-12-21 13:40:09,680 INFO L226 Difference]: Without dead ends: 6921 [2021-12-21 13:40:09,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:40:09,695 INFO L933 BasicCegarLoop]: 1800 mSDtfsCounter, 2345 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2345 SdHoareTripleChecker+Valid, 2830 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:40:09,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2345 Valid, 2830 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:40:09,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6921 states. [2021-12-21 13:40:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6921 to 6919. [2021-12-21 13:40:10,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6919 states, 6918 states have (on average 1.533102052616363) internal successors, (10606), 6918 states have internal predecessors, (10606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6919 states to 6919 states and 10606 transitions. [2021-12-21 13:40:10,031 INFO L78 Accepts]: Start accepts. Automaton has 6919 states and 10606 transitions. Word has length 300 [2021-12-21 13:40:10,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:10,032 INFO L470 AbstractCegarLoop]: Abstraction has 6919 states and 10606 transitions. [2021-12-21 13:40:10,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 6919 states and 10606 transitions. [2021-12-21 13:40:10,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-12-21 13:40:10,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:10,042 INFO L514 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] [2021-12-21 13:40:10,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:40:10,042 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:10,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:10,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1699563604, now seen corresponding path program 1 times [2021-12-21 13:40:10,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:10,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257483153] [2021-12-21 13:40:10,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:10,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:10,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:10,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257483153] [2021-12-21 13:40:10,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257483153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:10,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:10,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:10,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886679120] [2021-12-21 13:40:10,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:10,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:10,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:10,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:10,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:10,112 INFO L87 Difference]: Start difference. First operand 6919 states and 10606 transitions. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:10,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:10,771 INFO L93 Difference]: Finished difference Result 20370 states and 31174 transitions. [2021-12-21 13:40:10,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:10,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 302 [2021-12-21 13:40:10,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:10,811 INFO L225 Difference]: With dead ends: 20370 [2021-12-21 13:40:10,812 INFO L226 Difference]: Without dead ends: 13576 [2021-12-21 13:40:10,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:10,820 INFO L933 BasicCegarLoop]: 2052 mSDtfsCounter, 951 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 3084 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:40:10,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [951 Valid, 3084 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:40:10,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13576 states. [2021-12-21 13:40:11,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13576 to 13574. [2021-12-21 13:40:11,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13574 states, 13573 states have (on average 1.5238340823694099) internal successors, (20683), 13573 states have internal predecessors, (20683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13574 states to 13574 states and 20683 transitions. [2021-12-21 13:40:11,422 INFO L78 Accepts]: Start accepts. Automaton has 13574 states and 20683 transitions. Word has length 302 [2021-12-21 13:40:11,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:11,423 INFO L470 AbstractCegarLoop]: Abstraction has 13574 states and 20683 transitions. [2021-12-21 13:40:11,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:11,423 INFO L276 IsEmpty]: Start isEmpty. Operand 13574 states and 20683 transitions. [2021-12-21 13:40:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-12-21 13:40:11,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:11,442 INFO L514 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] [2021-12-21 13:40:11,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:40:11,442 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:11,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:11,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1759066023, now seen corresponding path program 1 times [2021-12-21 13:40:11,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:11,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269852035] [2021-12-21 13:40:11,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:11,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:11,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:11,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269852035] [2021-12-21 13:40:11,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269852035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:11,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:11,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:11,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101757680] [2021-12-21 13:40:11,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:11,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:11,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:11,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:11,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:11,487 INFO L87 Difference]: Start difference. First operand 13574 states and 20683 transitions. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:12,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:12,588 INFO L93 Difference]: Finished difference Result 40655 states and 61933 transitions. [2021-12-21 13:40:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:12,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 302 [2021-12-21 13:40:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:12,645 INFO L225 Difference]: With dead ends: 40655 [2021-12-21 13:40:12,646 INFO L226 Difference]: Without dead ends: 27119 [2021-12-21 13:40:12,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:12,668 INFO L933 BasicCegarLoop]: 2154 mSDtfsCounter, 1074 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 3229 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:40:12,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1074 Valid, 3229 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:40:12,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27119 states. [2021-12-21 13:40:13,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27119 to 13593. [2021-12-21 13:40:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13593 states, 13592 states have (on average 1.5237639788110653) internal successors, (20711), 13592 states have internal predecessors, (20711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13593 states to 13593 states and 20711 transitions. [2021-12-21 13:40:13,415 INFO L78 Accepts]: Start accepts. Automaton has 13593 states and 20711 transitions. Word has length 302 [2021-12-21 13:40:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:13,415 INFO L470 AbstractCegarLoop]: Abstraction has 13593 states and 20711 transitions. [2021-12-21 13:40:13,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 13593 states and 20711 transitions. [2021-12-21 13:40:13,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-12-21 13:40:13,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:13,433 INFO L514 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] [2021-12-21 13:40:13,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:40:13,434 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:13,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:13,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1114402342, now seen corresponding path program 1 times [2021-12-21 13:40:13,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:13,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133467884] [2021-12-21 13:40:13,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:13,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:13,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:13,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133467884] [2021-12-21 13:40:13,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133467884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:13,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:13,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:13,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970022695] [2021-12-21 13:40:13,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:13,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:13,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:13,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:13,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:13,479 INFO L87 Difference]: Start difference. First operand 13593 states and 20711 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:14,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:14,698 INFO L93 Difference]: Finished difference Result 40674 states and 61954 transitions. [2021-12-21 13:40:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:14,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 303 [2021-12-21 13:40:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:14,755 INFO L225 Difference]: With dead ends: 40674 [2021-12-21 13:40:14,755 INFO L226 Difference]: Without dead ends: 27137 [2021-12-21 13:40:14,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:14,777 INFO L933 BasicCegarLoop]: 2154 mSDtfsCounter, 1069 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 3229 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:40:14,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1069 Valid, 3229 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:40:14,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27137 states. [2021-12-21 13:40:15,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27137 to 13611. [2021-12-21 13:40:15,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13611 states, 13610 states have (on average 1.5232916972814108) internal successors, (20732), 13610 states have internal predecessors, (20732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:15,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13611 states to 13611 states and 20732 transitions. [2021-12-21 13:40:15,608 INFO L78 Accepts]: Start accepts. Automaton has 13611 states and 20732 transitions. Word has length 303 [2021-12-21 13:40:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:15,609 INFO L470 AbstractCegarLoop]: Abstraction has 13611 states and 20732 transitions. [2021-12-21 13:40:15,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:15,609 INFO L276 IsEmpty]: Start isEmpty. Operand 13611 states and 20732 transitions. [2021-12-21 13:40:15,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-12-21 13:40:15,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:15,626 INFO L514 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] [2021-12-21 13:40:15,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:40:15,626 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:15,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:15,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1692908177, now seen corresponding path program 1 times [2021-12-21 13:40:15,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:15,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384022288] [2021-12-21 13:40:15,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:15,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:15,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:15,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384022288] [2021-12-21 13:40:15,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384022288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:15,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:15,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:15,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376342830] [2021-12-21 13:40:15,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:15,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:15,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:15,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:15,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:15,694 INFO L87 Difference]: Start difference. First operand 13611 states and 20732 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:17,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:17,079 INFO L93 Difference]: Finished difference Result 39974 states and 60781 transitions. [2021-12-21 13:40:17,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:17,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2021-12-21 13:40:17,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:17,146 INFO L225 Difference]: With dead ends: 39974 [2021-12-21 13:40:17,147 INFO L226 Difference]: Without dead ends: 26604 [2021-12-21 13:40:17,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:17,168 INFO L933 BasicCegarLoop]: 2114 mSDtfsCounter, 944 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:40:17,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [944 Valid, 3146 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:40:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26604 states. [2021-12-21 13:40:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26604 to 26602. [2021-12-21 13:40:18,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26602 states, 26601 states have (on average 1.5130258260967633) internal successors, (40248), 26601 states have internal predecessors, (40248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26602 states to 26602 states and 40248 transitions. [2021-12-21 13:40:18,580 INFO L78 Accepts]: Start accepts. Automaton has 26602 states and 40248 transitions. Word has length 304 [2021-12-21 13:40:18,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:18,580 INFO L470 AbstractCegarLoop]: Abstraction has 26602 states and 40248 transitions. [2021-12-21 13:40:18,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:18,581 INFO L276 IsEmpty]: Start isEmpty. Operand 26602 states and 40248 transitions. [2021-12-21 13:40:18,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-12-21 13:40:18,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:18,611 INFO L514 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] [2021-12-21 13:40:18,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:40:18,611 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:18,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:18,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1965180108, now seen corresponding path program 1 times [2021-12-21 13:40:18,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:18,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200100737] [2021-12-21 13:40:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:18,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:18,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:18,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200100737] [2021-12-21 13:40:18,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200100737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:18,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:18,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:40:18,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847567186] [2021-12-21 13:40:18,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:18,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:40:18,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:18,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:40:18,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:40:18,802 INFO L87 Difference]: Start difference. First operand 26602 states and 40248 transitions. Second operand has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:21,992 INFO L93 Difference]: Finished difference Result 78700 states and 118913 transitions. [2021-12-21 13:40:21,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:40:21,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2021-12-21 13:40:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:22,092 INFO L225 Difference]: With dead ends: 78700 [2021-12-21 13:40:22,092 INFO L226 Difference]: Without dead ends: 52153 [2021-12-21 13:40:22,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:40:22,269 INFO L933 BasicCegarLoop]: 1744 mSDtfsCounter, 3061 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3061 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:40:22,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3061 Valid, 2774 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:40:22,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52153 states. [2021-12-21 13:40:25,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52153 to 52151. [2021-12-21 13:40:25,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52151 states, 52150 states have (on average 1.5027612655800575) internal successors, (78369), 52150 states have internal predecessors, (78369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:25,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52151 states to 52151 states and 78369 transitions. [2021-12-21 13:40:25,406 INFO L78 Accepts]: Start accepts. Automaton has 52151 states and 78369 transitions. Word has length 304 [2021-12-21 13:40:25,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:40:25,407 INFO L470 AbstractCegarLoop]: Abstraction has 52151 states and 78369 transitions. [2021-12-21 13:40:25,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:25,407 INFO L276 IsEmpty]: Start isEmpty. Operand 52151 states and 78369 transitions. [2021-12-21 13:40:25,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-21 13:40:25,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:40:25,453 INFO L514 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] [2021-12-21 13:40:25,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:40:25,453 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:40:25,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:40:25,454 INFO L85 PathProgramCache]: Analyzing trace with hash 826900730, now seen corresponding path program 1 times [2021-12-21 13:40:25,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:40:25,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752443777] [2021-12-21 13:40:25,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:40:25,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:40:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:40:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:40:25,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:40:25,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752443777] [2021-12-21 13:40:25,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752443777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:40:25,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:40:25,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:40:25,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198122375] [2021-12-21 13:40:25,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:40:25,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:40:25,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:40:25,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:40:25,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:25,531 INFO L87 Difference]: Start difference. First operand 52151 states and 78369 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:40:32,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:40:32,145 INFO L93 Difference]: Finished difference Result 153737 states and 230682 transitions. [2021-12-21 13:40:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:40:32,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 306 [2021-12-21 13:40:32,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:40:32,424 INFO L225 Difference]: With dead ends: 153737 [2021-12-21 13:40:32,425 INFO L226 Difference]: Without dead ends: 102103 [2021-12-21 13:40:32,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:40:32,472 INFO L933 BasicCegarLoop]: 2100 mSDtfsCounter, 931 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 3132 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:40:32,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [931 Valid, 3132 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:40:32,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102103 states.