./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem18_label32.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/eca-rers2012/Problem18_label32.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 9fe63c6822605a2b0612035ec90852abb82a2acf0695aaeb56ee53db058c6c96 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 13:23:22,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 13:23:22,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 13:23:22,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 13:23:22,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 13:23:22,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 13:23:22,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 13:23:22,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 13:23:22,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 13:23:22,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 13:23:22,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 13:23:22,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 13:23:22,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 13:23:22,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 13:23:22,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 13:23:22,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 13:23:22,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 13:23:22,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 13:23:22,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 13:23:22,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 13:23:22,129 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 13:23:22,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 13:23:22,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 13:23:22,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 13:23:22,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 13:23:22,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 13:23:22,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 13:23:22,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 13:23:22,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 13:23:22,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 13:23:22,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 13:23:22,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 13:23:22,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 13:23:22,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 13:23:22,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 13:23:22,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 13:23:22,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 13:23:22,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 13:23:22,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 13:23:22,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 13:23:22,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 13:23:22,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 13:23:22,141 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 13:23:22,158 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 13:23:22,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 13:23:22,158 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 13:23:22,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 13:23:22,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 13:23:22,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 13:23:22,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 13:23:22,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 13:23:22,160 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 13:23:22,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 13:23:22,161 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 13:23:22,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 13:23:22,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 13:23:22,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 13:23:22,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 13:23:22,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 13:23:22,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 13:23:22,162 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 13:23:22,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 13:23:22,163 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 13:23:22,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 13:23:22,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 13:23:22,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 13:23:22,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 13:23:22,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:23:22,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 13:23:22,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 13:23:22,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 13:23:22,165 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 13:23:22,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 13:23:22,165 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 13:23:22,165 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 13:23:22,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 13:23:22,165 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fe63c6822605a2b0612035ec90852abb82a2acf0695aaeb56ee53db058c6c96 [2022-07-13 13:23:22,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 13:23:22,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 13:23:22,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 13:23:22,412 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 13:23:22,412 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 13:23:22,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label32.c [2022-07-13 13:23:22,455 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb00ef9f0/de938053ef1a49faac6e4fe0cc9e1c96/FLAG0dd2a7dbe [2022-07-13 13:23:22,996 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 13:23:22,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label32.c [2022-07-13 13:23:23,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb00ef9f0/de938053ef1a49faac6e4fe0cc9e1c96/FLAG0dd2a7dbe [2022-07-13 13:23:23,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb00ef9f0/de938053ef1a49faac6e4fe0cc9e1c96 [2022-07-13 13:23:23,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 13:23:23,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 13:23:23,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 13:23:23,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 13:23:23,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 13:23:23,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:23:23" (1/1) ... [2022-07-13 13:23:23,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33dd0428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:23:23, skipping insertion in model container [2022-07-13 13:23:23,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:23:23" (1/1) ... [2022-07-13 13:23:23,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 13:23:23,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 13:23:23,732 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/eca-rers2012/Problem18_label32.c[3190,3203] [2022-07-13 13:23:24,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:23:24,355 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 13:23:24,378 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/eca-rers2012/Problem18_label32.c[3190,3203] [2022-07-13 13:23:24,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:23:24,574 INFO L208 MainTranslator]: Completed translation [2022-07-13 13:23:24,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:23:24 WrapperNode [2022-07-13 13:23:24,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 13:23:24,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 13:23:24,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 13:23:24,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 13:23:24,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:23:24" (1/1) ... [2022-07-13 13:23:24,622 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:23:24" (1/1) ... [2022-07-13 13:23:24,765 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2022-07-13 13:23:24,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 13:23:24,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 13:23:24,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 13:23:24,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 13:23:24,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:23:24" (1/1) ... [2022-07-13 13:23:24,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:23:24" (1/1) ... [2022-07-13 13:23:24,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:23:24" (1/1) ... [2022-07-13 13:23:24,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:23:24" (1/1) ... [2022-07-13 13:23:24,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:23:24" (1/1) ... [2022-07-13 13:23:24,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:23:24" (1/1) ... [2022-07-13 13:23:24,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:23:24" (1/1) ... [2022-07-13 13:23:25,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 13:23:25,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 13:23:25,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 13:23:25,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 13:23:25,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:23:24" (1/1) ... [2022-07-13 13:23:25,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:23:25,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:23:25,045 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) [2022-07-13 13:23:25,061 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 [2022-07-13 13:23:25,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 13:23:25,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 13:23:25,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 13:23:25,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 13:23:25,140 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 13:23:25,141 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 13:23:27,340 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 13:23:27,353 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 13:23:27,354 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 13:23:27,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:23:27 BoogieIcfgContainer [2022-07-13 13:23:27,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 13:23:27,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 13:23:27,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 13:23:27,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 13:23:27,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 01:23:23" (1/3) ... [2022-07-13 13:23:27,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@524dc888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:23:27, skipping insertion in model container [2022-07-13 13:23:27,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:23:24" (2/3) ... [2022-07-13 13:23:27,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@524dc888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:23:27, skipping insertion in model container [2022-07-13 13:23:27,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:23:27" (3/3) ... [2022-07-13 13:23:27,365 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label32.c [2022-07-13 13:23:27,378 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 13:23:27,378 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 13:23:27,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 13:23:27,439 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e74d892, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7c4ab24 [2022-07-13 13:23:27,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 13:23:27,450 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 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) [2022-07-13 13:23:27,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 13:23:27,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:23:27,457 INFO L195 NwaCegarLoop]: 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] [2022-07-13 13:23:27,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:23:27,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:23:27,461 INFO L85 PathProgramCache]: Analyzing trace with hash -716875070, now seen corresponding path program 1 times [2022-07-13 13:23:27,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:23:27,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336070551] [2022-07-13 13:23:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:23:27,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:23:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:23:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:23:27,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:23:27,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336070551] [2022-07-13 13:23:27,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336070551] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:23:27,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:23:27,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:23:27,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199424879] [2022-07-13 13:23:27,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:23:27,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:23:27,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:23:27,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:23:27,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:23:27,689 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 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 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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) [2022-07-13 13:23:30,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:23:30,312 INFO L93 Difference]: Finished difference Result 2205 states and 4266 transitions. [2022-07-13 13:23:30,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:23:30,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 28 [2022-07-13 13:23:30,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:23:30,330 INFO L225 Difference]: With dead ends: 2205 [2022-07-13 13:23:30,330 INFO L226 Difference]: Without dead ends: 1384 [2022-07-13 13:23:30,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:23:30,336 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 720 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 967 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 967 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:23:30,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 291 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [967 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-13 13:23:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-07-13 13:23:30,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2022-07-13 13:23:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.7339117859725235) internal successors, (2398), 1383 states have internal predecessors, (2398), 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) [2022-07-13 13:23:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2398 transitions. [2022-07-13 13:23:30,424 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2398 transitions. Word has length 28 [2022-07-13 13:23:30,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:23:30,424 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 2398 transitions. [2022-07-13 13:23:30,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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) [2022-07-13 13:23:30,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2398 transitions. [2022-07-13 13:23:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-13 13:23:30,430 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:23:30,430 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:23:30,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 13:23:30,431 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:23:30,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:23:30,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1236872616, now seen corresponding path program 1 times [2022-07-13 13:23:30,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:23:30,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443449036] [2022-07-13 13:23:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:23:30,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:23:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:23:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:23:30,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:23:30,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443449036] [2022-07-13 13:23:30,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443449036] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:23:30,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:23:30,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:23:30,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062859354] [2022-07-13 13:23:30,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:23:30,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:23:30,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:23:30,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:23:30,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:23:30,609 INFO L87 Difference]: Start difference. First operand 1384 states and 2398 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 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) [2022-07-13 13:23:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:23:33,777 INFO L93 Difference]: Finished difference Result 4842 states and 8275 transitions. [2022-07-13 13:23:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 13:23:33,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2022-07-13 13:23:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:23:33,788 INFO L225 Difference]: With dead ends: 4842 [2022-07-13 13:23:33,788 INFO L226 Difference]: Without dead ends: 3460 [2022-07-13 13:23:33,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 13:23:33,791 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 2033 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3268 mSolverCounterSat, 1421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2033 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 4689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1421 IncrementalHoareTripleChecker+Valid, 3268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:23:33,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2033 Valid, 137 Invalid, 4689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1421 Valid, 3268 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-13 13:23:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2022-07-13 13:23:33,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3454. [2022-07-13 13:23:33,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.540689255719664) internal successors, (5320), 3453 states have internal predecessors, (5320), 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) [2022-07-13 13:23:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5320 transitions. [2022-07-13 13:23:33,841 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5320 transitions. Word has length 97 [2022-07-13 13:23:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:23:33,841 INFO L495 AbstractCegarLoop]: Abstraction has 3454 states and 5320 transitions. [2022-07-13 13:23:33,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 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) [2022-07-13 13:23:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5320 transitions. [2022-07-13 13:23:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-07-13 13:23:33,846 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:23:33,846 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:23:33,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 13:23:33,847 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:23:33,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:23:33,847 INFO L85 PathProgramCache]: Analyzing trace with hash 657121558, now seen corresponding path program 1 times [2022-07-13 13:23:33,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:23:33,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392407296] [2022-07-13 13:23:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:23:33,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:23:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:23:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 13:23:33,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:23:33,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392407296] [2022-07-13 13:23:33,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392407296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:23:33,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:23:33,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:23:33,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392102969] [2022-07-13 13:23:33,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:23:33,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:23:33,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:23:33,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:23:33,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:23:33,986 INFO L87 Difference]: Start difference. First operand 3454 states and 5320 transitions. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 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) [2022-07-13 13:23:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:23:37,384 INFO L93 Difference]: Finished difference Result 11046 states and 17161 transitions. [2022-07-13 13:23:37,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:23:37,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 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 206 [2022-07-13 13:23:37,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:23:37,437 INFO L225 Difference]: With dead ends: 11046 [2022-07-13 13:23:37,450 INFO L226 Difference]: Without dead ends: 7594 [2022-07-13 13:23:37,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 13:23:37,461 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 1922 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4378 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1922 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 5007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 4378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:23:37,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1922 Valid, 647 Invalid, 5007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 4378 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-13 13:23:37,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7594 states. [2022-07-13 13:23:37,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7594 to 6904. [2022-07-13 13:23:37,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6903 states have (on average 1.326959293060988) internal successors, (9160), 6903 states have internal predecessors, (9160), 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) [2022-07-13 13:23:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 9160 transitions. [2022-07-13 13:23:37,620 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 9160 transitions. Word has length 206 [2022-07-13 13:23:37,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:23:37,622 INFO L495 AbstractCegarLoop]: Abstraction has 6904 states and 9160 transitions. [2022-07-13 13:23:37,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 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) [2022-07-13 13:23:37,622 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 9160 transitions. [2022-07-13 13:23:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-07-13 13:23:37,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:23:37,627 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:23:37,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 13:23:37,628 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:23:37,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:23:37,630 INFO L85 PathProgramCache]: Analyzing trace with hash -643458823, now seen corresponding path program 1 times [2022-07-13 13:23:37,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:23:37,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511394909] [2022-07-13 13:23:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:23:37,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:23:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:23:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:23:37,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:23:37,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511394909] [2022-07-13 13:23:37,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511394909] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:23:37,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:23:37,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:23:37,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63711367] [2022-07-13 13:23:37,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:23:37,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:23:37,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:23:37,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:23:37,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:23:37,863 INFO L87 Difference]: Start difference. First operand 6904 states and 9160 transitions. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 3 states have internal predecessors, (295), 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) [2022-07-13 13:23:40,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:23:40,223 INFO L93 Difference]: Finished difference Result 16619 states and 22097 transitions. [2022-07-13 13:23:40,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:23:40,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 3 states have internal predecessors, (295), 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 295 [2022-07-13 13:23:40,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:23:40,251 INFO L225 Difference]: With dead ends: 16619 [2022-07-13 13:23:40,251 INFO L226 Difference]: Without dead ends: 9664 [2022-07-13 13:23:40,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:23:40,311 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 515 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3037 mSolverCounterSat, 688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 3725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 3037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:23:40,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 637 Invalid, 3725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 3037 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 13:23:40,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2022-07-13 13:23:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 8974. [2022-07-13 13:23:40,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8974 states, 8973 states have (on average 1.1907946060403432) internal successors, (10685), 8973 states have internal predecessors, (10685), 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) [2022-07-13 13:23:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 10685 transitions. [2022-07-13 13:23:40,417 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 10685 transitions. Word has length 295 [2022-07-13 13:23:40,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:23:40,418 INFO L495 AbstractCegarLoop]: Abstraction has 8974 states and 10685 transitions. [2022-07-13 13:23:40,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 3 states have internal predecessors, (295), 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) [2022-07-13 13:23:40,419 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 10685 transitions. [2022-07-13 13:23:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2022-07-13 13:23:40,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:23:40,432 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:23:40,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 13:23:40,433 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:23:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:23:40,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1772001160, now seen corresponding path program 1 times [2022-07-13 13:23:40,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:23:40,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572948604] [2022-07-13 13:23:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:23:40,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:23:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:23:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2022-07-13 13:23:40,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:23:40,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572948604] [2022-07-13 13:23:40,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572948604] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:23:40,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:23:40,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:23:40,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290432227] [2022-07-13 13:23:40,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:23:40,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:23:40,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:23:40,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:23:40,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:23:40,824 INFO L87 Difference]: Start difference. First operand 8974 states and 10685 transitions. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 2 states have internal predecessors, (546), 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) [2022-07-13 13:23:42,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:23:42,318 INFO L93 Difference]: Finished difference Result 20016 states and 24051 transitions. [2022-07-13 13:23:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:23:42,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 2 states have internal predecessors, (546), 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 927 [2022-07-13 13:23:42,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:23:42,387 INFO L225 Difference]: With dead ends: 20016 [2022-07-13 13:23:42,387 INFO L226 Difference]: Without dead ends: 11044 [2022-07-13 13:23:42,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:23:42,401 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 249 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 2478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:23:42,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 77 Invalid, 2478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:23:42,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11044 states. [2022-07-13 13:23:42,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11044 to 11044. [2022-07-13 13:23:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11044 states, 11043 states have (on average 1.1927012587159287) internal successors, (13171), 11043 states have internal predecessors, (13171), 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) [2022-07-13 13:23:42,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11044 states to 11044 states and 13171 transitions. [2022-07-13 13:23:42,548 INFO L78 Accepts]: Start accepts. Automaton has 11044 states and 13171 transitions. Word has length 927 [2022-07-13 13:23:42,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:23:42,550 INFO L495 AbstractCegarLoop]: Abstraction has 11044 states and 13171 transitions. [2022-07-13 13:23:42,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 2 states have internal predecessors, (546), 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) [2022-07-13 13:23:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 11044 states and 13171 transitions. [2022-07-13 13:23:42,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 933 [2022-07-13 13:23:42,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:23:42,571 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:23:42,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 13:23:42,572 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:23:42,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:23:42,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1469485511, now seen corresponding path program 1 times [2022-07-13 13:23:42,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:23:42,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664147715] [2022-07-13 13:23:42,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:23:42,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:23:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:23:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2022-07-13 13:23:42,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:23:42,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664147715] [2022-07-13 13:23:42,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664147715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:23:42,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:23:42,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:23:42,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335353681] [2022-07-13 13:23:42,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:23:42,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:23:42,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:23:42,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:23:42,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:23:42,868 INFO L87 Difference]: Start difference. First operand 11044 states and 13171 transitions. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 2 states have internal predecessors, (546), 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) [2022-07-13 13:23:44,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:23:44,409 INFO L93 Difference]: Finished difference Result 26916 states and 33022 transitions. [2022-07-13 13:23:44,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:23:44,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 2 states have internal predecessors, (546), 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 932 [2022-07-13 13:23:44,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:23:44,432 INFO L225 Difference]: With dead ends: 26916 [2022-07-13 13:23:44,432 INFO L226 Difference]: Without dead ends: 15874 [2022-07-13 13:23:44,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:23:44,442 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 226 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:23:44,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 389 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:23:44,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15874 states. [2022-07-13 13:23:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15874 to 14494. [2022-07-13 13:23:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14494 states, 14493 states have (on average 1.1620782446698406) internal successors, (16842), 14493 states have internal predecessors, (16842), 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) [2022-07-13 13:23:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14494 states to 14494 states and 16842 transitions. [2022-07-13 13:23:44,577 INFO L78 Accepts]: Start accepts. Automaton has 14494 states and 16842 transitions. Word has length 932 [2022-07-13 13:23:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:23:44,578 INFO L495 AbstractCegarLoop]: Abstraction has 14494 states and 16842 transitions. [2022-07-13 13:23:44,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 2 states have internal predecessors, (546), 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) [2022-07-13 13:23:44,578 INFO L276 IsEmpty]: Start isEmpty. Operand 14494 states and 16842 transitions. [2022-07-13 13:23:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1014 [2022-07-13 13:23:44,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:23:44,586 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:23:44,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 13:23:44,586 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:23:44,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:23:44,587 INFO L85 PathProgramCache]: Analyzing trace with hash 554117137, now seen corresponding path program 1 times [2022-07-13 13:23:44,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:23:44,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181134231] [2022-07-13 13:23:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:23:44,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:23:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:23:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2022-07-13 13:23:44,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:23:44,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181134231] [2022-07-13 13:23:44,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181134231] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:23:44,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:23:44,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:23:44,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840003314] [2022-07-13 13:23:44,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:23:44,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:23:44,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:23:44,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:23:44,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:23:44,924 INFO L87 Difference]: Start difference. First operand 14494 states and 16842 transitions. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 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) [2022-07-13 13:23:46,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:23:46,297 INFO L93 Difference]: Finished difference Result 28986 states and 33682 transitions. [2022-07-13 13:23:46,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:23:46,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 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 1013 [2022-07-13 13:23:46,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:23:46,318 INFO L225 Difference]: With dead ends: 28986 [2022-07-13 13:23:46,319 INFO L226 Difference]: Without dead ends: 14494 [2022-07-13 13:23:46,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:23:46,334 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 769 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:23:46,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [769 Valid, 780 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1974 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 13:23:46,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14494 states. [2022-07-13 13:23:46,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14494 to 14494. [2022-07-13 13:23:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14494 states, 14493 states have (on average 1.1424825777961776) internal successors, (16558), 14493 states have internal predecessors, (16558), 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) [2022-07-13 13:23:46,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14494 states to 14494 states and 16558 transitions. [2022-07-13 13:23:46,527 INFO L78 Accepts]: Start accepts. Automaton has 14494 states and 16558 transitions. Word has length 1013 [2022-07-13 13:23:46,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:23:46,528 INFO L495 AbstractCegarLoop]: Abstraction has 14494 states and 16558 transitions. [2022-07-13 13:23:46,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 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) [2022-07-13 13:23:46,528 INFO L276 IsEmpty]: Start isEmpty. Operand 14494 states and 16558 transitions. [2022-07-13 13:23:46,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1051 [2022-07-13 13:23:46,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:23:46,536 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:23:46,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 13:23:46,537 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:23:46,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:23:46,537 INFO L85 PathProgramCache]: Analyzing trace with hash 624428174, now seen corresponding path program 1 times [2022-07-13 13:23:46,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:23:46,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557652923] [2022-07-13 13:23:46,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:23:46,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:23:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:23:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 582 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-07-13 13:23:46,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:23:46,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557652923] [2022-07-13 13:23:46,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557652923] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:23:46,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:23:46,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:23:46,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993461663] [2022-07-13 13:23:46,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:23:46,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:23:46,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:23:46,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:23:46,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:23:46,824 INFO L87 Difference]: Start difference. First operand 14494 states and 16558 transitions. Second operand has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 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) [2022-07-13 13:23:48,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:23:48,649 INFO L93 Difference]: Finished difference Result 35196 states and 40497 transitions. [2022-07-13 13:23:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:23:48,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 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 1050 [2022-07-13 13:23:48,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:23:48,674 INFO L225 Difference]: With dead ends: 35196 [2022-07-13 13:23:48,675 INFO L226 Difference]: Without dead ends: 20704 [2022-07-13 13:23:48,692 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:23:48,693 INFO L413 NwaCegarLoop]: 1010 mSDtfsCounter, 574 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1985 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 2329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 1985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:23:48,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 1017 Invalid, 2329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 1985 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 13:23:48,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20704 states. [2022-07-13 13:23:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20704 to 20014. [2022-07-13 13:23:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20014 states, 20013 states have (on average 1.1260680557637535) internal successors, (22536), 20013 states have internal predecessors, (22536), 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) [2022-07-13 13:23:48,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20014 states to 20014 states and 22536 transitions. [2022-07-13 13:23:48,868 INFO L78 Accepts]: Start accepts. Automaton has 20014 states and 22536 transitions. Word has length 1050 [2022-07-13 13:23:48,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:23:48,869 INFO L495 AbstractCegarLoop]: Abstraction has 20014 states and 22536 transitions. [2022-07-13 13:23:48,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 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) [2022-07-13 13:23:48,869 INFO L276 IsEmpty]: Start isEmpty. Operand 20014 states and 22536 transitions. [2022-07-13 13:23:48,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1104 [2022-07-13 13:23:48,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:23:48,880 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:23:48,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 13:23:48,881 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:23:48,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:23:48,882 INFO L85 PathProgramCache]: Analyzing trace with hash 933857118, now seen corresponding path program 1 times [2022-07-13 13:23:48,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:23:48,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370188437] [2022-07-13 13:23:48,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:23:48,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:23:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:23:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 390 proven. 555 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2022-07-13 13:23:49,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:23:49,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370188437] [2022-07-13 13:23:49,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370188437] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:23:49,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962629282] [2022-07-13 13:23:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:23:49,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:23:49,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:23:49,341 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:23:49,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 13:23:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:23:49,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 13:23:49,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:23:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 479 proven. 0 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2022-07-13 13:23:49,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:23:49,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962629282] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:23:49,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:23:49,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-13 13:23:49,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983191216] [2022-07-13 13:23:49,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:23:49,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:23:49,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:23:49,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:23:49,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 13:23:49,795 INFO L87 Difference]: Start difference. First operand 20014 states and 22536 transitions. Second operand has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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) [2022-07-13 13:23:51,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:23:51,496 INFO L93 Difference]: Finished difference Result 46926 states and 52709 transitions. [2022-07-13 13:23:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:23:51,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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 1103 [2022-07-13 13:23:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:23:51,527 INFO L225 Difference]: With dead ends: 46926 [2022-07-13 13:23:51,528 INFO L226 Difference]: Without dead ends: 22774 [2022-07-13 13:23:51,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1108 GetRequests, 1103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 13:23:51,544 INFO L413 NwaCegarLoop]: 967 mSDtfsCounter, 649 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:23:51,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 973 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:23:51,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22774 states. [2022-07-13 13:23:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22774 to 22084. [2022-07-13 13:23:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22084 states, 22083 states have (on average 1.0654802336639044) internal successors, (23529), 22083 states have internal predecessors, (23529), 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) [2022-07-13 13:23:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22084 states to 22084 states and 23529 transitions. [2022-07-13 13:23:51,826 INFO L78 Accepts]: Start accepts. Automaton has 22084 states and 23529 transitions. Word has length 1103 [2022-07-13 13:23:51,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:23:51,827 INFO L495 AbstractCegarLoop]: Abstraction has 22084 states and 23529 transitions. [2022-07-13 13:23:51,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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) [2022-07-13 13:23:51,828 INFO L276 IsEmpty]: Start isEmpty. Operand 22084 states and 23529 transitions. [2022-07-13 13:23:51,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1246 [2022-07-13 13:23:51,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:23:51,844 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:23:51,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 13:23:52,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:23:52,062 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:23:52,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:23:52,063 INFO L85 PathProgramCache]: Analyzing trace with hash 694716079, now seen corresponding path program 1 times [2022-07-13 13:23:52,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:23:52,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922113422] [2022-07-13 13:23:52,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:23:52,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:23:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:23:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 1075 proven. 0 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-13 13:23:52,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:23:52,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922113422] [2022-07-13 13:23:52,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922113422] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:23:52,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:23:52,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:23:52,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577042758] [2022-07-13 13:23:52,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:23:52,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:23:52,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:23:52,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:23:52,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:23:52,449 INFO L87 Difference]: Start difference. First operand 22084 states and 23529 transitions. Second operand has 4 states, 4 states have (on average 207.0) internal successors, (828), 3 states have internal predecessors, (828), 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) [2022-07-13 13:23:54,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:23:54,604 INFO L93 Difference]: Finished difference Result 46236 states and 49379 transitions. [2022-07-13 13:23:54,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:23:54,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 207.0) internal successors, (828), 3 states have internal predecessors, (828), 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 1245 [2022-07-13 13:23:54,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:23:54,629 INFO L225 Difference]: With dead ends: 46236 [2022-07-13 13:23:54,629 INFO L226 Difference]: Without dead ends: 24844 [2022-07-13 13:23:54,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:23:54,643 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 963 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2743 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 3206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 2743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 13:23:54,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 113 Invalid, 3206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 2743 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 13:23:54,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24844 states. [2022-07-13 13:23:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24844 to 24844. [2022-07-13 13:23:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24844 states, 24843 states have (on average 1.063840920983778) internal successors, (26429), 24843 states have internal predecessors, (26429), 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) [2022-07-13 13:23:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24844 states to 24844 states and 26429 transitions. [2022-07-13 13:23:54,880 INFO L78 Accepts]: Start accepts. Automaton has 24844 states and 26429 transitions. Word has length 1245 [2022-07-13 13:23:54,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:23:54,881 INFO L495 AbstractCegarLoop]: Abstraction has 24844 states and 26429 transitions. [2022-07-13 13:23:54,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.0) internal successors, (828), 3 states have internal predecessors, (828), 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) [2022-07-13 13:23:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 24844 states and 26429 transitions. [2022-07-13 13:23:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1270 [2022-07-13 13:23:54,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:23:54,900 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:23:54,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 13:23:54,900 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:23:54,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:23:54,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2070936941, now seen corresponding path program 1 times [2022-07-13 13:23:54,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:23:54,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328275183] [2022-07-13 13:23:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:23:54,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:23:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:23:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 1065 proven. 664 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 13:23:55,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:23:55,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328275183] [2022-07-13 13:23:55,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328275183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:23:55,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362138152] [2022-07-13 13:23:55,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:23:55,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:23:55,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:23:55,314 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:23:55,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 13:23:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:23:55,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 13:23:55,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:23:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 1091 proven. 0 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2022-07-13 13:23:55,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:23:55,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362138152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:23:55,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:23:55,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 13:23:55,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753784873] [2022-07-13 13:23:55,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:23:55,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:23:55,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:23:55,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:23:55,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:23:55,723 INFO L87 Difference]: Start difference. First operand 24844 states and 26429 transitions. Second operand has 3 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 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) [2022-07-13 13:23:57,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:23:57,111 INFO L93 Difference]: Finished difference Result 59346 states and 63503 transitions. [2022-07-13 13:23:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:23:57,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 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 1269 [2022-07-13 13:23:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:23:57,157 INFO L225 Difference]: With dead ends: 59346 [2022-07-13 13:23:57,157 INFO L226 Difference]: Without dead ends: 35194 [2022-07-13 13:23:57,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1275 GetRequests, 1269 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:23:57,178 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 639 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1707 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:23:57,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 116 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1707 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 13:23:57,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35194 states. [2022-07-13 13:23:57,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35194 to 35194. [2022-07-13 13:23:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35194 states, 35193 states have (on average 1.0532492256982924) internal successors, (37067), 35193 states have internal predecessors, (37067), 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) [2022-07-13 13:23:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35194 states to 35194 states and 37067 transitions. [2022-07-13 13:23:57,478 INFO L78 Accepts]: Start accepts. Automaton has 35194 states and 37067 transitions. Word has length 1269 [2022-07-13 13:23:57,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:23:57,479 INFO L495 AbstractCegarLoop]: Abstraction has 35194 states and 37067 transitions. [2022-07-13 13:23:57,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 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) [2022-07-13 13:23:57,480 INFO L276 IsEmpty]: Start isEmpty. Operand 35194 states and 37067 transitions. [2022-07-13 13:23:57,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1275 [2022-07-13 13:23:57,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:23:57,516 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:23:57,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 13:23:57,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 13:23:57,730 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:23:57,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:23:57,731 INFO L85 PathProgramCache]: Analyzing trace with hash 98918394, now seen corresponding path program 1 times [2022-07-13 13:23:57,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:23:57,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785679482] [2022-07-13 13:23:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:23:57,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:23:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:23:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 1081 proven. 0 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2022-07-13 13:23:58,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:23:58,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785679482] [2022-07-13 13:23:58,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785679482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:23:58,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:23:58,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:23:58,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410631261] [2022-07-13 13:23:58,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:23:58,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:23:58,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:23:58,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:23:58,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:23:58,128 INFO L87 Difference]: Start difference. First operand 35194 states and 37067 transitions. Second operand has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 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) [2022-07-13 13:23:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:23:59,313 INFO L93 Difference]: Finished difference Result 69696 states and 73441 transitions. [2022-07-13 13:23:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:23:59,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 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 1274 [2022-07-13 13:23:59,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:23:59,347 INFO L225 Difference]: With dead ends: 69696 [2022-07-13 13:23:59,348 INFO L226 Difference]: Without dead ends: 35194 [2022-07-13 13:23:59,366 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:23:59,366 INFO L413 NwaCegarLoop]: 921 mSDtfsCounter, 522 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:23:59,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 927 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 13:23:59,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35194 states. [2022-07-13 13:23:59,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35194 to 34504. [2022-07-13 13:23:59,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34504 states, 34503 states have (on average 1.0467495580094484) internal successors, (36116), 34503 states have internal predecessors, (36116), 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) [2022-07-13 13:23:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34504 states to 34504 states and 36116 transitions. [2022-07-13 13:23:59,632 INFO L78 Accepts]: Start accepts. Automaton has 34504 states and 36116 transitions. Word has length 1274 [2022-07-13 13:23:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:23:59,633 INFO L495 AbstractCegarLoop]: Abstraction has 34504 states and 36116 transitions. [2022-07-13 13:23:59,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 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) [2022-07-13 13:23:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 34504 states and 36116 transitions. [2022-07-13 13:23:59,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1325 [2022-07-13 13:23:59,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:23:59,703 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:23:59,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 13:23:59,703 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:23:59,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:23:59,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1163599459, now seen corresponding path program 1 times [2022-07-13 13:23:59,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:23:59,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172876793] [2022-07-13 13:23:59,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:23:59,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:23:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1969 backedges. 600 proven. 0 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2022-07-13 13:24:00,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:24:00,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172876793] [2022-07-13 13:24:00,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172876793] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:24:00,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:24:00,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:24:00,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407428784] [2022-07-13 13:24:00,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:24:00,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:24:00,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:24:00,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:24:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:24:00,073 INFO L87 Difference]: Start difference. First operand 34504 states and 36116 transitions. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 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) [2022-07-13 13:24:01,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:24:01,452 INFO L93 Difference]: Finished difference Result 75906 states and 79765 transitions. [2022-07-13 13:24:01,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:24:01,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 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 1324 [2022-07-13 13:24:01,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:24:01,495 INFO L225 Difference]: With dead ends: 75906 [2022-07-13 13:24:01,495 INFO L226 Difference]: Without dead ends: 42094 [2022-07-13 13:24:01,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:24:01,520 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 642 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:24:01,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 92 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 1662 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 13:24:01,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42094 states. [2022-07-13 13:24:01,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42094 to 40024. [2022-07-13 13:24:01,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40024 states, 40023 states have (on average 1.0483472003597931) internal successors, (41958), 40023 states have internal predecessors, (41958), 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) [2022-07-13 13:24:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40024 states to 40024 states and 41958 transitions. [2022-07-13 13:24:01,983 INFO L78 Accepts]: Start accepts. Automaton has 40024 states and 41958 transitions. Word has length 1324 [2022-07-13 13:24:01,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:24:01,984 INFO L495 AbstractCegarLoop]: Abstraction has 40024 states and 41958 transitions. [2022-07-13 13:24:01,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 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) [2022-07-13 13:24:01,985 INFO L276 IsEmpty]: Start isEmpty. Operand 40024 states and 41958 transitions. [2022-07-13 13:24:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1399 [2022-07-13 13:24:02,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:24:02,014 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:24:02,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 13:24:02,014 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:24:02,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:24:02,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1900927407, now seen corresponding path program 1 times [2022-07-13 13:24:02,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:24:02,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40501431] [2022-07-13 13:24:02,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:02,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:24:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 1385 proven. 0 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2022-07-13 13:24:02,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:24:02,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40501431] [2022-07-13 13:24:02,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40501431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:24:02,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:24:02,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:24:02,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452003252] [2022-07-13 13:24:02,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:24:02,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:24:02,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:24:02,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:24:02,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:24:02,357 INFO L87 Difference]: Start difference. First operand 40024 states and 41958 transitions. Second operand has 3 states, 3 states have (on average 302.3333333333333) internal successors, (907), 3 states have internal predecessors, (907), 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) [2022-07-13 13:24:03,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:24:03,859 INFO L93 Difference]: Finished difference Result 89706 states and 94403 transitions. [2022-07-13 13:24:03,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:24:03,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 302.3333333333333) internal successors, (907), 3 states have internal predecessors, (907), 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 1398 [2022-07-13 13:24:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:24:03,913 INFO L225 Difference]: With dead ends: 89706 [2022-07-13 13:24:03,913 INFO L226 Difference]: Without dead ends: 49684 [2022-07-13 13:24:03,938 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:24:03,938 INFO L413 NwaCegarLoop]: 942 mSDtfsCounter, 456 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:24:03,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 949 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 13:24:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49684 states. [2022-07-13 13:24:04,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49684 to 49684. [2022-07-13 13:24:04,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49684 states, 49683 states have (on average 1.0462331179679165) internal successors, (51980), 49683 states have internal predecessors, (51980), 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) [2022-07-13 13:24:04,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49684 states to 49684 states and 51980 transitions. [2022-07-13 13:24:04,476 INFO L78 Accepts]: Start accepts. Automaton has 49684 states and 51980 transitions. Word has length 1398 [2022-07-13 13:24:04,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:24:04,476 INFO L495 AbstractCegarLoop]: Abstraction has 49684 states and 51980 transitions. [2022-07-13 13:24:04,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 302.3333333333333) internal successors, (907), 3 states have internal predecessors, (907), 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) [2022-07-13 13:24:04,477 INFO L276 IsEmpty]: Start isEmpty. Operand 49684 states and 51980 transitions. [2022-07-13 13:24:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1486 [2022-07-13 13:24:04,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:24:04,512 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:24:04,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 13:24:04,512 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:24:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:24:04,513 INFO L85 PathProgramCache]: Analyzing trace with hash -945114661, now seen corresponding path program 1 times [2022-07-13 13:24:04,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:24:04,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381314546] [2022-07-13 13:24:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:04,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:24:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2465 backedges. 819 proven. 1353 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-07-13 13:24:05,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:24:05,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381314546] [2022-07-13 13:24:05,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381314546] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:24:05,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849635909] [2022-07-13 13:24:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:05,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:24:05,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:24:05,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:24:05,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 13:24:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:05,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1749 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 13:24:05,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:24:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2465 backedges. 1433 proven. 0 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2022-07-13 13:24:05,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:24:05,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849635909] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:24:05,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:24:05,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 13:24:05,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460166565] [2022-07-13 13:24:05,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:24:05,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:24:05,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:24:05,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:24:05,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:24:05,853 INFO L87 Difference]: Start difference. First operand 49684 states and 51980 transitions. Second operand has 3 states, 3 states have (on average 293.3333333333333) internal successors, (880), 3 states have internal predecessors, (880), 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) [2022-07-13 13:24:07,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:24:07,650 INFO L93 Difference]: Finished difference Result 98676 states and 103267 transitions. [2022-07-13 13:24:07,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:24:07,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 293.3333333333333) internal successors, (880), 3 states have internal predecessors, (880), 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 1485 [2022-07-13 13:24:07,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:24:07,705 INFO L225 Difference]: With dead ends: 98676 [2022-07-13 13:24:07,705 INFO L226 Difference]: Without dead ends: 49684 [2022-07-13 13:24:07,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1491 GetRequests, 1485 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:24:07,736 INFO L413 NwaCegarLoop]: 882 mSDtfsCounter, 425 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1608 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 1808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:24:07,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 889 Invalid, 1808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1608 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:24:07,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49684 states. [2022-07-13 13:24:08,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49684 to 48994. [2022-07-13 13:24:08,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48994 states, 48993 states have (on average 1.0343926683403752) internal successors, (50678), 48993 states have internal predecessors, (50678), 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) [2022-07-13 13:24:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48994 states to 48994 states and 50678 transitions. [2022-07-13 13:24:08,517 INFO L78 Accepts]: Start accepts. Automaton has 48994 states and 50678 transitions. Word has length 1485 [2022-07-13 13:24:08,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:24:08,518 INFO L495 AbstractCegarLoop]: Abstraction has 48994 states and 50678 transitions. [2022-07-13 13:24:08,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.3333333333333) internal successors, (880), 3 states have internal predecessors, (880), 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) [2022-07-13 13:24:08,519 INFO L276 IsEmpty]: Start isEmpty. Operand 48994 states and 50678 transitions. [2022-07-13 13:24:08,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1503 [2022-07-13 13:24:08,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:24:08,544 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:24:08,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 13:24:08,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:24:08,767 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:24:08,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:24:08,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1356641258, now seen corresponding path program 1 times [2022-07-13 13:24:08,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:24:08,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733627377] [2022-07-13 13:24:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:08,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:24:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2065 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2022-07-13 13:24:09,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:24:09,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733627377] [2022-07-13 13:24:09,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733627377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:24:09,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:24:09,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:24:09,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118948336] [2022-07-13 13:24:09,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:24:09,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:24:09,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:24:09,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:24:09,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:24:09,353 INFO L87 Difference]: Start difference. First operand 48994 states and 50678 transitions. Second operand has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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) [2022-07-13 13:24:10,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:24:10,851 INFO L93 Difference]: Finished difference Result 97986 states and 101359 transitions. [2022-07-13 13:24:10,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:24:10,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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 1502 [2022-07-13 13:24:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:24:10,986 INFO L225 Difference]: With dead ends: 97986 [2022-07-13 13:24:10,987 INFO L226 Difference]: Without dead ends: 49684 [2022-07-13 13:24:11,017 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:24:11,018 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 619 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:24:11,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 65 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 13:24:11,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49684 states. [2022-07-13 13:24:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49684 to 48994. [2022-07-13 13:24:11,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48994 states, 48993 states have (on average 1.0335558140958911) internal successors, (50637), 48993 states have internal predecessors, (50637), 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) [2022-07-13 13:24:11,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48994 states to 48994 states and 50637 transitions. [2022-07-13 13:24:11,460 INFO L78 Accepts]: Start accepts. Automaton has 48994 states and 50637 transitions. Word has length 1502 [2022-07-13 13:24:11,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:24:11,461 INFO L495 AbstractCegarLoop]: Abstraction has 48994 states and 50637 transitions. [2022-07-13 13:24:11,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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) [2022-07-13 13:24:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 48994 states and 50637 transitions. [2022-07-13 13:24:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1561 [2022-07-13 13:24:11,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:24:11,487 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:24:11,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 13:24:11,488 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:24:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:24:11,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1480368737, now seen corresponding path program 1 times [2022-07-13 13:24:11,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:24:11,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364669722] [2022-07-13 13:24:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:11,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:24:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 1643 proven. 0 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2022-07-13 13:24:12,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:24:12,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364669722] [2022-07-13 13:24:12,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364669722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:24:12,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:24:12,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:24:12,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753030152] [2022-07-13 13:24:12,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:24:12,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:24:12,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:24:12,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:24:12,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:24:12,015 INFO L87 Difference]: Start difference. First operand 48994 states and 50637 transitions. Second operand has 3 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 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) [2022-07-13 13:24:13,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:24:13,798 INFO L93 Difference]: Finished difference Result 124896 states and 129241 transitions. [2022-07-13 13:24:13,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:24:13,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 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 1560 [2022-07-13 13:24:13,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:24:13,863 INFO L225 Difference]: With dead ends: 124896 [2022-07-13 13:24:13,864 INFO L226 Difference]: Without dead ends: 75904 [2022-07-13 13:24:13,891 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:24:13,892 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 615 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:24:13,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 241 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:24:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75904 states. [2022-07-13 13:24:14,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75904 to 75904. [2022-07-13 13:24:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75904 states, 75903 states have (on average 1.0296957959500943) internal successors, (78157), 75903 states have internal predecessors, (78157), 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) [2022-07-13 13:24:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75904 states to 75904 states and 78157 transitions. [2022-07-13 13:24:14,860 INFO L78 Accepts]: Start accepts. Automaton has 75904 states and 78157 transitions. Word has length 1560 [2022-07-13 13:24:14,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:24:14,861 INFO L495 AbstractCegarLoop]: Abstraction has 75904 states and 78157 transitions. [2022-07-13 13:24:14,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 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) [2022-07-13 13:24:14,861 INFO L276 IsEmpty]: Start isEmpty. Operand 75904 states and 78157 transitions. [2022-07-13 13:24:14,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2012 [2022-07-13 13:24:14,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:24:14,928 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:24:14,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 13:24:14,929 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:24:14,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:24:14,930 INFO L85 PathProgramCache]: Analyzing trace with hash 128687949, now seen corresponding path program 1 times [2022-07-13 13:24:14,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:24:14,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854243872] [2022-07-13 13:24:14,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:14,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:24:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3610 backedges. 2187 proven. 1305 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-07-13 13:24:15,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:24:15,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854243872] [2022-07-13 13:24:15,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854243872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:24:15,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377949447] [2022-07-13 13:24:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:15,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:24:15,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:24:15,904 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:24:15,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 13:24:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:16,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 2275 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 13:24:16,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:24:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3610 backedges. 2024 proven. 0 refuted. 0 times theorem prover too weak. 1586 trivial. 0 not checked. [2022-07-13 13:24:16,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:24:16,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377949447] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:24:16,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:24:16,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-07-13 13:24:16,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078549413] [2022-07-13 13:24:16,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:24:16,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:24:16,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:24:16,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:24:16,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-13 13:24:16,493 INFO L87 Difference]: Start difference. First operand 75904 states and 78157 transitions. Second operand has 3 states, 3 states have (on average 415.6666666666667) internal successors, (1247), 3 states have internal predecessors, (1247), 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) [2022-07-13 13:24:17,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:24:17,887 INFO L93 Difference]: Finished difference Result 153876 states and 158421 transitions. [2022-07-13 13:24:17,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:24:17,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 415.6666666666667) internal successors, (1247), 3 states have internal predecessors, (1247), 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 2011 [2022-07-13 13:24:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:24:17,974 INFO L225 Difference]: With dead ends: 153876 [2022-07-13 13:24:17,974 INFO L226 Difference]: Without dead ends: 78664 [2022-07-13 13:24:18,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2024 GetRequests, 2015 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-13 13:24:18,034 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 599 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:24:18,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 265 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 13:24:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78664 states. [2022-07-13 13:24:18,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78664 to 75904. [2022-07-13 13:24:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75904 states, 75903 states have (on average 1.0257170335823353) internal successors, (77855), 75903 states have internal predecessors, (77855), 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) [2022-07-13 13:24:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75904 states to 75904 states and 77855 transitions. [2022-07-13 13:24:18,943 INFO L78 Accepts]: Start accepts. Automaton has 75904 states and 77855 transitions. Word has length 2011 [2022-07-13 13:24:18,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:24:18,944 INFO L495 AbstractCegarLoop]: Abstraction has 75904 states and 77855 transitions. [2022-07-13 13:24:18,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 415.6666666666667) internal successors, (1247), 3 states have internal predecessors, (1247), 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) [2022-07-13 13:24:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 75904 states and 77855 transitions. [2022-07-13 13:24:19,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2043 [2022-07-13 13:24:19,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:24:19,017 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:24:19,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 13:24:19,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 13:24:19,237 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:24:19,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:24:19,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1982509720, now seen corresponding path program 1 times [2022-07-13 13:24:19,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:24:19,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040185942] [2022-07-13 13:24:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:19,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:24:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3781 backedges. 1572 proven. 0 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2022-07-13 13:24:20,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:24:20,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040185942] [2022-07-13 13:24:20,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040185942] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:24:20,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:24:20,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:24:20,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926140626] [2022-07-13 13:24:20,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:24:20,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:24:20,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:24:20,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:24:20,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:24:20,193 INFO L87 Difference]: Start difference. First operand 75904 states and 77855 transitions. Second operand has 3 states, 3 states have (on average 390.3333333333333) internal successors, (1171), 3 states have internal predecessors, (1171), 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) [2022-07-13 13:24:21,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:24:21,593 INFO L93 Difference]: Finished difference Result 153186 states and 157123 transitions. [2022-07-13 13:24:21,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:24:21,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 390.3333333333333) internal successors, (1171), 3 states have internal predecessors, (1171), 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 2042 [2022-07-13 13:24:21,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:24:21,680 INFO L225 Difference]: With dead ends: 153186 [2022-07-13 13:24:21,680 INFO L226 Difference]: Without dead ends: 76594 [2022-07-13 13:24:21,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:24:21,727 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 109 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:24:21,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 764 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 13:24:21,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76594 states. [2022-07-13 13:24:22,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76594 to 74524. [2022-07-13 13:24:22,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74524 states, 74523 states have (on average 1.0226238879272171) internal successors, (76209), 74523 states have internal predecessors, (76209), 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) [2022-07-13 13:24:22,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74524 states to 74524 states and 76209 transitions. [2022-07-13 13:24:22,727 INFO L78 Accepts]: Start accepts. Automaton has 74524 states and 76209 transitions. Word has length 2042 [2022-07-13 13:24:22,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:24:22,728 INFO L495 AbstractCegarLoop]: Abstraction has 74524 states and 76209 transitions. [2022-07-13 13:24:22,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 390.3333333333333) internal successors, (1171), 3 states have internal predecessors, (1171), 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) [2022-07-13 13:24:22,729 INFO L276 IsEmpty]: Start isEmpty. Operand 74524 states and 76209 transitions. [2022-07-13 13:24:22,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2043 [2022-07-13 13:24:22,792 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:24:22,793 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:24:22,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 13:24:22,793 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:24:22,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:24:22,794 INFO L85 PathProgramCache]: Analyzing trace with hash 357132646, now seen corresponding path program 1 times [2022-07-13 13:24:22,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:24:22,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294692480] [2022-07-13 13:24:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:22,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:24:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3681 backedges. 1900 proven. 1648 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-07-13 13:24:23,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:24:23,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294692480] [2022-07-13 13:24:23,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294692480] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:24:23,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755114562] [2022-07-13 13:24:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:23,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:24:23,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:24:23,594 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:24:23,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 13:24:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:23,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 2307 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 13:24:23,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:24:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3681 backedges. 2055 proven. 0 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2022-07-13 13:24:24,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:24:24,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755114562] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:24:24,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:24:24,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2022-07-13 13:24:24,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124536745] [2022-07-13 13:24:24,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:24:24,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:24:24,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:24:24,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:24:24,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-13 13:24:24,287 INFO L87 Difference]: Start difference. First operand 74524 states and 76209 transitions. Second operand has 3 states, 3 states have (on average 415.6666666666667) internal successors, (1247), 3 states have internal predecessors, (1247), 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) [2022-07-13 13:24:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:24:25,882 INFO L93 Difference]: Finished difference Result 148356 states and 151725 transitions. [2022-07-13 13:24:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:24:25,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 415.6666666666667) internal successors, (1247), 3 states have internal predecessors, (1247), 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 2042 [2022-07-13 13:24:25,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:24:25,961 INFO L225 Difference]: With dead ends: 148356 [2022-07-13 13:24:25,961 INFO L226 Difference]: Without dead ends: 74524 [2022-07-13 13:24:26,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2050 GetRequests, 2042 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-13 13:24:26,008 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 589 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:24:26,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 963 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 13:24:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74524 states. [2022-07-13 13:24:26,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74524 to 74524. [2022-07-13 13:24:26,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74524 states, 74523 states have (on average 1.022140815587134) internal successors, (76173), 74523 states have internal predecessors, (76173), 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) [2022-07-13 13:24:26,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74524 states to 74524 states and 76173 transitions. [2022-07-13 13:24:26,860 INFO L78 Accepts]: Start accepts. Automaton has 74524 states and 76173 transitions. Word has length 2042 [2022-07-13 13:24:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:24:26,861 INFO L495 AbstractCegarLoop]: Abstraction has 74524 states and 76173 transitions. [2022-07-13 13:24:26,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 415.6666666666667) internal successors, (1247), 3 states have internal predecessors, (1247), 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) [2022-07-13 13:24:26,861 INFO L276 IsEmpty]: Start isEmpty. Operand 74524 states and 76173 transitions. [2022-07-13 13:24:26,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2062 [2022-07-13 13:24:26,930 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:24:26,931 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:24:26,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 13:24:27,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:24:27,138 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:24:27,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:24:27,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1446599775, now seen corresponding path program 1 times [2022-07-13 13:24:27,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:24:27,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430615026] [2022-07-13 13:24:27,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:27,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:24:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 1617 proven. 0 refuted. 0 times theorem prover too weak. 2388 trivial. 0 not checked. [2022-07-13 13:24:27,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:24:27,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430615026] [2022-07-13 13:24:27,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430615026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:24:27,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:24:27,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:24:27,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435432547] [2022-07-13 13:24:27,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:24:27,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:24:27,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:24:27,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:24:27,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:24:27,925 INFO L87 Difference]: Start difference. First operand 74524 states and 76173 transitions. Second operand has 3 states, 3 states have (on average 390.6666666666667) internal successors, (1172), 3 states have internal predecessors, (1172), 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) [2022-07-13 13:24:29,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:24:29,484 INFO L93 Difference]: Finished difference Result 158706 states and 162215 transitions. [2022-07-13 13:24:29,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:24:29,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 390.6666666666667) internal successors, (1172), 3 states have internal predecessors, (1172), 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 2061 [2022-07-13 13:24:29,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:24:29,581 INFO L225 Difference]: With dead ends: 158706 [2022-07-13 13:24:29,581 INFO L226 Difference]: Without dead ends: 84874 [2022-07-13 13:24:29,621 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:24:29,622 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 77 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 13:24:29,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 267 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1723 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 13:24:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84874 states. [2022-07-13 13:24:30,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84874 to 82804. [2022-07-13 13:24:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82804 states, 82803 states have (on average 1.0209895776723066) internal successors, (84541), 82803 states have internal predecessors, (84541), 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) [2022-07-13 13:24:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82804 states to 82804 states and 84541 transitions. [2022-07-13 13:24:30,481 INFO L78 Accepts]: Start accepts. Automaton has 82804 states and 84541 transitions. Word has length 2061 [2022-07-13 13:24:30,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:24:30,482 INFO L495 AbstractCegarLoop]: Abstraction has 82804 states and 84541 transitions. [2022-07-13 13:24:30,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 390.6666666666667) internal successors, (1172), 3 states have internal predecessors, (1172), 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) [2022-07-13 13:24:30,482 INFO L276 IsEmpty]: Start isEmpty. Operand 82804 states and 84541 transitions. [2022-07-13 13:24:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2078 [2022-07-13 13:24:30,553 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:24:30,553 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:24:30,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 13:24:30,554 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:24:30,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:24:30,558 INFO L85 PathProgramCache]: Analyzing trace with hash 819422670, now seen corresponding path program 1 times [2022-07-13 13:24:30,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:24:30,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678178797] [2022-07-13 13:24:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:30,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:24:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 2958 proven. 0 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked. [2022-07-13 13:24:31,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:24:31,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678178797] [2022-07-13 13:24:31,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678178797] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:24:31,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:24:31,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:24:31,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014922805] [2022-07-13 13:24:31,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:24:31,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:24:31,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:24:31,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:24:31,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:24:31,453 INFO L87 Difference]: Start difference. First operand 82804 states and 84541 transitions. Second operand has 4 states, 4 states have (on average 329.75) internal successors, (1319), 4 states have internal predecessors, (1319), 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) [2022-07-13 13:24:34,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:24:34,324 INFO L93 Difference]: Finished difference Result 197346 states and 201714 transitions. [2022-07-13 13:24:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:24:34,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 329.75) internal successors, (1319), 4 states have internal predecessors, (1319), 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 2077 [2022-07-13 13:24:34,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:24:34,463 INFO L225 Difference]: With dead ends: 197346 [2022-07-13 13:24:34,463 INFO L226 Difference]: Without dead ends: 115234 [2022-07-13 13:24:34,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:24:34,508 INFO L413 NwaCegarLoop]: 950 mSDtfsCounter, 1246 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 3294 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 3601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 3294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:24:34,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1246 Valid, 962 Invalid, 3601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 3294 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 13:24:34,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115234 states. [2022-07-13 13:24:35,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115234 to 113164. [2022-07-13 13:24:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113164 states, 113163 states have (on average 1.0185661391090728) internal successors, (115264), 113163 states have internal predecessors, (115264), 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) [2022-07-13 13:24:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113164 states to 113164 states and 115264 transitions. [2022-07-13 13:24:35,869 INFO L78 Accepts]: Start accepts. Automaton has 113164 states and 115264 transitions. Word has length 2077 [2022-07-13 13:24:35,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:24:35,870 INFO L495 AbstractCegarLoop]: Abstraction has 113164 states and 115264 transitions. [2022-07-13 13:24:35,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 329.75) internal successors, (1319), 4 states have internal predecessors, (1319), 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) [2022-07-13 13:24:35,870 INFO L276 IsEmpty]: Start isEmpty. Operand 113164 states and 115264 transitions. [2022-07-13 13:24:36,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2093 [2022-07-13 13:24:36,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:24:36,322 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:24:36,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 13:24:36,323 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:24:36,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:24:36,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1612861559, now seen corresponding path program 1 times [2022-07-13 13:24:36,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:24:36,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175484978] [2022-07-13 13:24:36,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:36,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:24:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 2793 proven. 78 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2022-07-13 13:24:36,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:24:36,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175484978] [2022-07-13 13:24:36,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175484978] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:24:36,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909958278] [2022-07-13 13:24:36,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:36,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:24:36,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:24:36,899 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:24:36,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 13:24:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:37,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 2363 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 13:24:37,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:24:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 2819 proven. 0 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-07-13 13:24:37,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:24:37,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909958278] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:24:37,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:24:37,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-13 13:24:37,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164348388] [2022-07-13 13:24:37,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:24:37,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:24:37,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:24:37,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:24:37,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:24:37,720 INFO L87 Difference]: Start difference. First operand 113164 states and 115264 transitions. Second operand has 3 states, 3 states have (on average 464.3333333333333) internal successors, (1393), 3 states have internal predecessors, (1393), 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) [2022-07-13 13:24:39,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:24:39,674 INFO L93 Difference]: Finished difference Result 228396 states and 232638 transitions. [2022-07-13 13:24:39,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:24:39,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 464.3333333333333) internal successors, (1393), 3 states have internal predecessors, (1393), 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 2092 [2022-07-13 13:24:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:24:39,974 INFO L225 Difference]: With dead ends: 228396 [2022-07-13 13:24:39,974 INFO L226 Difference]: Without dead ends: 115924 [2022-07-13 13:24:40,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2097 GetRequests, 2093 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:24:40,023 INFO L413 NwaCegarLoop]: 870 mSDtfsCounter, 456 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:24:40,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 876 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1727 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:24:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115924 states. [2022-07-13 13:24:41,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115924 to 109024. [2022-07-13 13:24:41,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109024 states, 109023 states have (on average 1.0171615163772783) internal successors, (110894), 109023 states have internal predecessors, (110894), 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) [2022-07-13 13:24:41,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109024 states to 109024 states and 110894 transitions. [2022-07-13 13:24:41,238 INFO L78 Accepts]: Start accepts. Automaton has 109024 states and 110894 transitions. Word has length 2092 [2022-07-13 13:24:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:24:41,239 INFO L495 AbstractCegarLoop]: Abstraction has 109024 states and 110894 transitions. [2022-07-13 13:24:41,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 464.3333333333333) internal successors, (1393), 3 states have internal predecessors, (1393), 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) [2022-07-13 13:24:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 109024 states and 110894 transitions. [2022-07-13 13:24:41,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2235 [2022-07-13 13:24:41,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:24:41,320 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:24:41,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 13:24:41,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:24:41,541 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:24:41,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:24:41,542 INFO L85 PathProgramCache]: Analyzing trace with hash 93078887, now seen corresponding path program 1 times [2022-07-13 13:24:41,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:24:41,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346393028] [2022-07-13 13:24:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:41,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:24:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4279 backedges. 2973 proven. 581 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2022-07-13 13:24:42,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:24:42,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346393028] [2022-07-13 13:24:42,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346393028] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:24:42,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371358267] [2022-07-13 13:24:42,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:42,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:24:42,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:24:42,516 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:24:42,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 13:24:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:42,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 2510 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 13:24:42,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:24:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4279 backedges. 2979 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-07-13 13:24:44,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:24:44,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371358267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:24:44,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:24:44,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2022-07-13 13:24:44,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234853850] [2022-07-13 13:24:44,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:24:44,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:24:44,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:24:44,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:24:44,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-13 13:24:44,138 INFO L87 Difference]: Start difference. First operand 109024 states and 110894 transitions. Second operand has 4 states, 4 states have (on average 315.75) internal successors, (1263), 3 states have internal predecessors, (1263), 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) [2022-07-13 13:24:46,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:24:46,891 INFO L93 Difference]: Finished difference Result 234606 states and 238725 transitions. [2022-07-13 13:24:46,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:24:46,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 315.75) internal successors, (1263), 3 states have internal predecessors, (1263), 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 2234 [2022-07-13 13:24:46,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:24:47,028 INFO L225 Difference]: With dead ends: 234606 [2022-07-13 13:24:47,028 INFO L226 Difference]: Without dead ends: 125584 [2022-07-13 13:24:47,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2241 GetRequests, 2232 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-13 13:24:47,088 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 990 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2599 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 2599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 13:24:47,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [990 Valid, 72 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 2599 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 13:24:47,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125584 states. [2022-07-13 13:24:48,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125584 to 122134. [2022-07-13 13:24:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122134 states, 122133 states have (on average 1.0170961165287022) internal successors, (124221), 122133 states have internal predecessors, (124221), 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) [2022-07-13 13:24:48,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122134 states to 122134 states and 124221 transitions. [2022-07-13 13:24:48,618 INFO L78 Accepts]: Start accepts. Automaton has 122134 states and 124221 transitions. Word has length 2234 [2022-07-13 13:24:48,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:24:48,618 INFO L495 AbstractCegarLoop]: Abstraction has 122134 states and 124221 transitions. [2022-07-13 13:24:48,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 315.75) internal successors, (1263), 3 states have internal predecessors, (1263), 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) [2022-07-13 13:24:48,619 INFO L276 IsEmpty]: Start isEmpty. Operand 122134 states and 124221 transitions. [2022-07-13 13:24:48,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2237 [2022-07-13 13:24:48,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:24:48,703 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:24:48,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 13:24:48,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:24:48,921 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:24:48,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:24:48,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1172114274, now seen corresponding path program 1 times [2022-07-13 13:24:48,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:24:48,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771524939] [2022-07-13 13:24:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:48,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:24:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4613 backedges. 2733 proven. 0 refuted. 0 times theorem prover too weak. 1880 trivial. 0 not checked. [2022-07-13 13:24:49,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:24:49,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771524939] [2022-07-13 13:24:49,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771524939] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:24:49,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:24:49,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:24:49,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752412953] [2022-07-13 13:24:49,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:24:49,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:24:49,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:24:49,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:24:49,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:24:49,888 INFO L87 Difference]: Start difference. First operand 122134 states and 124221 transitions. Second operand has 3 states, 3 states have (on average 459.0) internal successors, (1377), 3 states have internal predecessors, (1377), 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) [2022-07-13 13:24:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:24:52,155 INFO L93 Difference]: Finished difference Result 248406 states and 252723 transitions. [2022-07-13 13:24:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:24:52,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 459.0) internal successors, (1377), 3 states have internal predecessors, (1377), 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 2236 [2022-07-13 13:24:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:24:52,327 INFO L225 Difference]: With dead ends: 248406 [2022-07-13 13:24:52,328 INFO L226 Difference]: Without dead ends: 126964 [2022-07-13 13:24:52,412 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:24:52,413 INFO L413 NwaCegarLoop]: 835 mSDtfsCounter, 496 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:24:52,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 841 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:24:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126964 states. [2022-07-13 13:24:53,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126964 to 123514. [2022-07-13 13:24:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123514 states, 123513 states have (on average 1.015990219652992) internal successors, (125488), 123513 states have internal predecessors, (125488), 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) [2022-07-13 13:24:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123514 states to 123514 states and 125488 transitions. [2022-07-13 13:24:53,947 INFO L78 Accepts]: Start accepts. Automaton has 123514 states and 125488 transitions. Word has length 2236 [2022-07-13 13:24:53,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:24:53,948 INFO L495 AbstractCegarLoop]: Abstraction has 123514 states and 125488 transitions. [2022-07-13 13:24:53,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 459.0) internal successors, (1377), 3 states have internal predecessors, (1377), 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) [2022-07-13 13:24:53,948 INFO L276 IsEmpty]: Start isEmpty. Operand 123514 states and 125488 transitions. [2022-07-13 13:24:54,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2280 [2022-07-13 13:24:54,039 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:24:54,039 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:24:54,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 13:24:54,040 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:24:54,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:24:54,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1841420981, now seen corresponding path program 1 times [2022-07-13 13:24:54,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:24:54,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968247324] [2022-07-13 13:24:54,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:24:54,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:24:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:24:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4661 backedges. 3176 proven. 0 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2022-07-13 13:24:54,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:24:54,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968247324] [2022-07-13 13:24:54,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968247324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:24:54,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:24:54,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:24:54,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31360074] [2022-07-13 13:24:54,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:24:54,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:24:54,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:24:54,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:24:54,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:24:54,918 INFO L87 Difference]: Start difference. First operand 123514 states and 125488 transitions. Second operand has 3 states, 3 states have (on average 464.6666666666667) internal successors, (1394), 3 states have internal predecessors, (1394), 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) [2022-07-13 13:24:56,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:24:56,990 INFO L93 Difference]: Finished difference Result 251166 states and 255171 transitions. [2022-07-13 13:24:56,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:24:56,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 464.6666666666667) internal successors, (1394), 3 states have internal predecessors, (1394), 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 2279 [2022-07-13 13:24:56,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:24:57,130 INFO L225 Difference]: With dead ends: 251166 [2022-07-13 13:24:57,130 INFO L226 Difference]: Without dead ends: 128344 [2022-07-13 13:24:57,170 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:24:57,170 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 473 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1767 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:24:57,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 204 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1767 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:24:57,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128344 states.