./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label55.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/Problem03_label55.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 892d3c9e0b7c167d810581087b0633fb7bb5cd8a7fe1ab934154adc1945085ff --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:49:11,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:49:11,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:49:11,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:49:11,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:49:11,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:49:11,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:49:11,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:49:11,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:49:11,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:49:11,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:49:11,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:49:11,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:49:11,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:49:11,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:49:11,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:49:11,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:49:11,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:49:11,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:49:11,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:49:11,724 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:49:11,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:49:11,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:49:11,727 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:49:11,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:49:11,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:49:11,730 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:49:11,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:49:11,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:49:11,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:49:11,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:49:11,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:49:11,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:49:11,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:49:11,735 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:49:11,736 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:49:11,736 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:49:11,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:49:11,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:49:11,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:49:11,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:49:11,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:49:11,740 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:49:11,759 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:49:11,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:49:11,760 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:49:11,760 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:49:11,761 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:49:11,761 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:49:11,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:49:11,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:49:11,762 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:49:11,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:49:11,763 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:49:11,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:49:11,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:49:11,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:49:11,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:49:11,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:49:11,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:49:11,765 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:49:11,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:49:11,765 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:49:11,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:49:11,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:49:11,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:49:11,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:49:11,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:49:11,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:49:11,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:49:11,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:49:11,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:49:11,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:49:11,768 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:49:11,768 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:49:11,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:49:11,769 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 892d3c9e0b7c167d810581087b0633fb7bb5cd8a7fe1ab934154adc1945085ff [2022-07-13 11:49:12,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:49:12,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:49:12,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:49:12,047 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:49:12,048 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:49:12,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label55.c [2022-07-13 11:49:12,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf82d57b3/5c6f98e1f74d46f792c31d058bb99be3/FLAGe4e9681e6 [2022-07-13 11:49:12,655 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:49:12,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label55.c [2022-07-13 11:49:12,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf82d57b3/5c6f98e1f74d46f792c31d058bb99be3/FLAGe4e9681e6 [2022-07-13 11:49:13,143 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf82d57b3/5c6f98e1f74d46f792c31d058bb99be3 [2022-07-13 11:49:13,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:49:13,146 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:49:13,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:49:13,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:49:13,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:49:13,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:49:13" (1/1) ... [2022-07-13 11:49:13,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e88aaec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:13, skipping insertion in model container [2022-07-13 11:49:13,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:49:13" (1/1) ... [2022-07-13 11:49:13,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:49:13,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:49:13,746 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/Problem03_label55.c[56086,56099] [2022-07-13 11:49:13,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:49:13,789 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:49:13,936 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/Problem03_label55.c[56086,56099] [2022-07-13 11:49:13,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:49:13,966 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:49:13,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:13 WrapperNode [2022-07-13 11:49:13,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:49:13,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:49:13,968 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:49:13,969 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:49:13,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:13" (1/1) ... [2022-07-13 11:49:14,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:13" (1/1) ... [2022-07-13 11:49:14,100 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-13 11:49:14,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:49:14,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:49:14,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:49:14,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:49:14,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:13" (1/1) ... [2022-07-13 11:49:14,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:13" (1/1) ... [2022-07-13 11:49:14,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:13" (1/1) ... [2022-07-13 11:49:14,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:13" (1/1) ... [2022-07-13 11:49:14,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:13" (1/1) ... [2022-07-13 11:49:14,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:13" (1/1) ... [2022-07-13 11:49:14,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:13" (1/1) ... [2022-07-13 11:49:14,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:49:14,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:49:14,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:49:14,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:49:14,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:13" (1/1) ... [2022-07-13 11:49:14,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:49:14,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:14,240 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 11:49:14,268 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 11:49:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:49:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:49:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:49:14,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:49:14,381 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:49:14,382 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:49:15,687 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:49:15,702 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:49:15,702 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 11:49:15,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:49:15 BoogieIcfgContainer [2022-07-13 11:49:15,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:49:15,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:49:15,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:49:15,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:49:15,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:49:13" (1/3) ... [2022-07-13 11:49:15,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728fc04a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:49:15, skipping insertion in model container [2022-07-13 11:49:15,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:49:13" (2/3) ... [2022-07-13 11:49:15,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728fc04a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:49:15, skipping insertion in model container [2022-07-13 11:49:15,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:49:15" (3/3) ... [2022-07-13 11:49:15,716 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label55.c [2022-07-13 11:49:15,739 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:49:15,740 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:49:15,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:49:15,821 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@214cd941, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@60b5df63 [2022-07-13 11:49:15,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:49:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 11:49:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-13 11:49:15,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:15,856 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:49:15,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:15,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:15,863 INFO L85 PathProgramCache]: Analyzing trace with hash -317002646, now seen corresponding path program 1 times [2022-07-13 11:49:15,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:15,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597698402] [2022-07-13 11:49:15,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:15,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:16,417 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 11:49:16,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:16,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597698402] [2022-07-13 11:49:16,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597698402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:16,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:16,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:16,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189518116] [2022-07-13 11:49:16,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:16,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:16,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:16,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:16,461 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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 11:49:17,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:17,443 INFO L93 Difference]: Finished difference Result 843 states and 1493 transitions. [2022-07-13 11:49:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:17,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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 162 [2022-07-13 11:49:17,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:17,457 INFO L225 Difference]: With dead ends: 843 [2022-07-13 11:49:17,457 INFO L226 Difference]: Without dead ends: 463 [2022-07-13 11:49:17,461 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 11:49:17,464 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 112 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:17,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 121 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 11:49:17,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-07-13 11:49:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 449. [2022-07-13 11:49:17,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.6339285714285714) internal successors, (732), 448 states have internal predecessors, (732), 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 11:49:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 732 transitions. [2022-07-13 11:49:17,519 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 732 transitions. Word has length 162 [2022-07-13 11:49:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:17,520 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 732 transitions. [2022-07-13 11:49:17,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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 11:49:17,520 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 732 transitions. [2022-07-13 11:49:17,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-13 11:49:17,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:17,524 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 11:49:17,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:49:17,524 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:17,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:17,525 INFO L85 PathProgramCache]: Analyzing trace with hash 331981558, now seen corresponding path program 1 times [2022-07-13 11:49:17,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:17,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145245160] [2022-07-13 11:49:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:17,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:17,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:17,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145245160] [2022-07-13 11:49:17,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145245160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:17,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:17,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:17,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447799063] [2022-07-13 11:49:17,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:17,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:17,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:17,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:17,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:17,600 INFO L87 Difference]: Start difference. First operand 449 states and 732 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 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 11:49:18,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:18,256 INFO L93 Difference]: Finished difference Result 1333 states and 2180 transitions. [2022-07-13 11:49:18,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:18,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 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 168 [2022-07-13 11:49:18,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:18,260 INFO L225 Difference]: With dead ends: 1333 [2022-07-13 11:49:18,260 INFO L226 Difference]: Without dead ends: 886 [2022-07-13 11:49:18,262 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 11:49:18,264 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:18,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 114 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:49:18,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-07-13 11:49:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 882. [2022-07-13 11:49:18,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 1.6163450624290578) internal successors, (1424), 881 states have internal predecessors, (1424), 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 11:49:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1424 transitions. [2022-07-13 11:49:18,296 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1424 transitions. Word has length 168 [2022-07-13 11:49:18,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:18,296 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 1424 transitions. [2022-07-13 11:49:18,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 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 11:49:18,297 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1424 transitions. [2022-07-13 11:49:18,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-13 11:49:18,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:18,302 INFO L195 NwaCegarLoop]: trace histogram [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 11:49:18,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 11:49:18,302 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:18,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:18,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1835334450, now seen corresponding path program 1 times [2022-07-13 11:49:18,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:18,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274951885] [2022-07-13 11:49:18,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:18,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:18,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:18,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274951885] [2022-07-13 11:49:18,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274951885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:18,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:18,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:18,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322976972] [2022-07-13 11:49:18,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:18,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:18,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:18,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:18,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:18,394 INFO L87 Difference]: Start difference. First operand 882 states and 1424 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 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 11:49:19,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:19,126 INFO L93 Difference]: Finished difference Result 2575 states and 4172 transitions. [2022-07-13 11:49:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:19,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 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 168 [2022-07-13 11:49:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:19,133 INFO L225 Difference]: With dead ends: 2575 [2022-07-13 11:49:19,133 INFO L226 Difference]: Without dead ends: 1695 [2022-07-13 11:49:19,136 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 11:49:19,142 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 216 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:19,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 192 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:49:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2022-07-13 11:49:19,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1695. [2022-07-13 11:49:19,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 1.3984651711924438) internal successors, (2369), 1694 states have internal predecessors, (2369), 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 11:49:19,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2369 transitions. [2022-07-13 11:49:19,185 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2369 transitions. Word has length 168 [2022-07-13 11:49:19,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:19,187 INFO L495 AbstractCegarLoop]: Abstraction has 1695 states and 2369 transitions. [2022-07-13 11:49:19,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 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 11:49:19,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2369 transitions. [2022-07-13 11:49:19,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-13 11:49:19,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:19,199 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 11:49:19,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 11:49:19,200 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:19,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:19,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1871241535, now seen corresponding path program 1 times [2022-07-13 11:49:19,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:19,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058540308] [2022-07-13 11:49:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:19,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:19,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:19,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058540308] [2022-07-13 11:49:19,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058540308] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:19,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:19,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:19,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556346446] [2022-07-13 11:49:19,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:19,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:19,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:19,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:19,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:19,267 INFO L87 Difference]: Start difference. First operand 1695 states and 2369 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 11:49:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:20,007 INFO L93 Difference]: Finished difference Result 5062 states and 7081 transitions. [2022-07-13 11:49:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:20,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 174 [2022-07-13 11:49:20,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:20,020 INFO L225 Difference]: With dead ends: 5062 [2022-07-13 11:49:20,020 INFO L226 Difference]: Without dead ends: 3369 [2022-07-13 11:49:20,022 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 11:49:20,033 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 275 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:20,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 216 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:49:20,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2022-07-13 11:49:20,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 3360. [2022-07-13 11:49:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 1.3846382852039298) internal successors, (4651), 3359 states have internal predecessors, (4651), 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 11:49:20,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 4651 transitions. [2022-07-13 11:49:20,092 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 4651 transitions. Word has length 174 [2022-07-13 11:49:20,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:20,093 INFO L495 AbstractCegarLoop]: Abstraction has 3360 states and 4651 transitions. [2022-07-13 11:49:20,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 11:49:20,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 4651 transitions. [2022-07-13 11:49:20,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-13 11:49:20,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:20,099 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 11:49:20,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 11:49:20,100 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:20,101 INFO L85 PathProgramCache]: Analyzing trace with hash 962684326, now seen corresponding path program 1 times [2022-07-13 11:49:20,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:20,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029932956] [2022-07-13 11:49:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:20,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:20,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:20,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029932956] [2022-07-13 11:49:20,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029932956] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:20,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:20,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:20,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021287071] [2022-07-13 11:49:20,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:20,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:20,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:20,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:20,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:20,159 INFO L87 Difference]: Start difference. First operand 3360 states and 4651 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 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 11:49:20,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:20,830 INFO L93 Difference]: Finished difference Result 10006 states and 13851 transitions. [2022-07-13 11:49:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:20,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 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 175 [2022-07-13 11:49:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:20,854 INFO L225 Difference]: With dead ends: 10006 [2022-07-13 11:49:20,854 INFO L226 Difference]: Without dead ends: 6648 [2022-07-13 11:49:20,858 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 11:49:20,859 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 243 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:20,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 224 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:49:20,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6648 states. [2022-07-13 11:49:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6648 to 6641. [2022-07-13 11:49:20,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6641 states, 6640 states have (on average 1.3284638554216868) internal successors, (8821), 6640 states have internal predecessors, (8821), 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 11:49:20,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6641 states to 6641 states and 8821 transitions. [2022-07-13 11:49:20,977 INFO L78 Accepts]: Start accepts. Automaton has 6641 states and 8821 transitions. Word has length 175 [2022-07-13 11:49:20,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:20,977 INFO L495 AbstractCegarLoop]: Abstraction has 6641 states and 8821 transitions. [2022-07-13 11:49:20,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 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 11:49:20,978 INFO L276 IsEmpty]: Start isEmpty. Operand 6641 states and 8821 transitions. [2022-07-13 11:49:20,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-07-13 11:49:20,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:20,988 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:49:20,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 11:49:20,989 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:20,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:20,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1968582037, now seen corresponding path program 1 times [2022-07-13 11:49:20,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:20,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232353849] [2022-07-13 11:49:20,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:20,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 11:49:21,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:21,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232353849] [2022-07-13 11:49:21,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232353849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:21,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:21,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:21,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889290629] [2022-07-13 11:49:21,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:21,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:21,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:21,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:21,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:21,053 INFO L87 Difference]: Start difference. First operand 6641 states and 8821 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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 11:49:21,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:21,790 INFO L93 Difference]: Finished difference Result 18403 states and 24736 transitions. [2022-07-13 11:49:21,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:21,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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 176 [2022-07-13 11:49:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:21,844 INFO L225 Difference]: With dead ends: 18403 [2022-07-13 11:49:21,844 INFO L226 Difference]: Without dead ends: 12170 [2022-07-13 11:49:21,854 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 11:49:21,856 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:21,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:49:21,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2022-07-13 11:49:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 12127. [2022-07-13 11:49:22,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12127 states, 12126 states have (on average 1.318489196767277) internal successors, (15988), 12126 states have internal predecessors, (15988), 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 11:49:22,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12127 states to 12127 states and 15988 transitions. [2022-07-13 11:49:22,145 INFO L78 Accepts]: Start accepts. Automaton has 12127 states and 15988 transitions. Word has length 176 [2022-07-13 11:49:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:22,145 INFO L495 AbstractCegarLoop]: Abstraction has 12127 states and 15988 transitions. [2022-07-13 11:49:22,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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 11:49:22,146 INFO L276 IsEmpty]: Start isEmpty. Operand 12127 states and 15988 transitions. [2022-07-13 11:49:22,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-13 11:49:22,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:22,164 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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] [2022-07-13 11:49:22,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 11:49:22,165 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:22,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:22,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2124767808, now seen corresponding path program 1 times [2022-07-13 11:49:22,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:22,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556420134] [2022-07-13 11:49:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:22,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 11:49:22,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:22,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556420134] [2022-07-13 11:49:22,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556420134] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:22,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:22,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:49:22,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951109391] [2022-07-13 11:49:22,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:22,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:22,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:22,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:22,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:22,260 INFO L87 Difference]: Start difference. First operand 12127 states and 15988 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 11:49:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:23,037 INFO L93 Difference]: Finished difference Result 31583 states and 42424 transitions. [2022-07-13 11:49:23,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:23,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 183 [2022-07-13 11:49:23,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:23,085 INFO L225 Difference]: With dead ends: 31583 [2022-07-13 11:49:23,085 INFO L226 Difference]: Without dead ends: 19864 [2022-07-13 11:49:23,104 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 11:49:23,106 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 218 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:23,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 362 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:49:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19864 states. [2022-07-13 11:49:23,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19864 to 19854. [2022-07-13 11:49:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19854 states, 19853 states have (on average 1.279806578350879) internal successors, (25408), 19853 states have internal predecessors, (25408), 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 11:49:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19854 states to 19854 states and 25408 transitions. [2022-07-13 11:49:23,500 INFO L78 Accepts]: Start accepts. Automaton has 19854 states and 25408 transitions. Word has length 183 [2022-07-13 11:49:23,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:23,500 INFO L495 AbstractCegarLoop]: Abstraction has 19854 states and 25408 transitions. [2022-07-13 11:49:23,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 11:49:23,501 INFO L276 IsEmpty]: Start isEmpty. Operand 19854 states and 25408 transitions. [2022-07-13 11:49:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-13 11:49:23,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:23,524 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2022-07-13 11:49:23,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 11:49:23,525 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:23,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:23,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1144319502, now seen corresponding path program 1 times [2022-07-13 11:49:23,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:23,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060637016] [2022-07-13 11:49:23,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:23,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 11:49:23,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:23,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060637016] [2022-07-13 11:49:23,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060637016] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:23,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:23,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:49:23,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084636203] [2022-07-13 11:49:23,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:23,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:49:23,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:23,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:49:23,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:49:23,599 INFO L87 Difference]: Start difference. First operand 19854 states and 25408 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 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 11:49:24,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:24,619 INFO L93 Difference]: Finished difference Result 45523 states and 58726 transitions. [2022-07-13 11:49:24,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:49:24,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 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 187 [2022-07-13 11:49:24,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:24,734 INFO L225 Difference]: With dead ends: 45523 [2022-07-13 11:49:24,736 INFO L226 Difference]: Without dead ends: 26077 [2022-07-13 11:49:24,773 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 11:49:24,773 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 563 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:24,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 53 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 11:49:24,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26077 states. [2022-07-13 11:49:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26077 to 26068. [2022-07-13 11:49:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26068 states, 26067 states have (on average 1.2348946944412476) internal successors, (32190), 26067 states have internal predecessors, (32190), 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 11:49:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26068 states to 26068 states and 32190 transitions. [2022-07-13 11:49:25,257 INFO L78 Accepts]: Start accepts. Automaton has 26068 states and 32190 transitions. Word has length 187 [2022-07-13 11:49:25,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:25,257 INFO L495 AbstractCegarLoop]: Abstraction has 26068 states and 32190 transitions. [2022-07-13 11:49:25,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 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 11:49:25,258 INFO L276 IsEmpty]: Start isEmpty. Operand 26068 states and 32190 transitions. [2022-07-13 11:49:25,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-07-13 11:49:25,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:25,282 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, 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] [2022-07-13 11:49:25,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 11:49:25,284 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:25,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:25,285 INFO L85 PathProgramCache]: Analyzing trace with hash -496785840, now seen corresponding path program 1 times [2022-07-13 11:49:25,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:25,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825725807] [2022-07-13 11:49:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:25,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:25,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:25,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825725807] [2022-07-13 11:49:25,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825725807] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:25,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:25,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:25,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820113522] [2022-07-13 11:49:25,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:25,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:25,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:25,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:25,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:25,370 INFO L87 Difference]: Start difference. First operand 26068 states and 32190 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 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 11:49:26,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:26,412 INFO L93 Difference]: Finished difference Result 67615 states and 83814 transitions. [2022-07-13 11:49:26,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:26,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 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 190 [2022-07-13 11:49:26,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:26,486 INFO L225 Difference]: With dead ends: 67615 [2022-07-13 11:49:26,486 INFO L226 Difference]: Without dead ends: 41955 [2022-07-13 11:49:26,521 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 11:49:26,522 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 207 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:26,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 108 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 11:49:26,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41955 states. [2022-07-13 11:49:27,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41955 to 41940. [2022-07-13 11:49:27,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41940 states, 41939 states have (on average 1.2147643005317246) internal successors, (50946), 41939 states have internal predecessors, (50946), 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 11:49:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41940 states to 41940 states and 50946 transitions. [2022-07-13 11:49:27,260 INFO L78 Accepts]: Start accepts. Automaton has 41940 states and 50946 transitions. Word has length 190 [2022-07-13 11:49:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:27,261 INFO L495 AbstractCegarLoop]: Abstraction has 41940 states and 50946 transitions. [2022-07-13 11:49:27,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 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 11:49:27,261 INFO L276 IsEmpty]: Start isEmpty. Operand 41940 states and 50946 transitions. [2022-07-13 11:49:27,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-13 11:49:27,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:27,291 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, 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] [2022-07-13 11:49:27,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 11:49:27,292 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:27,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:27,292 INFO L85 PathProgramCache]: Analyzing trace with hash -99342165, now seen corresponding path program 1 times [2022-07-13 11:49:27,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:27,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124813342] [2022-07-13 11:49:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:27,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:27,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:27,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124813342] [2022-07-13 11:49:27,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124813342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:27,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:27,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:27,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873263250] [2022-07-13 11:49:27,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:27,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:27,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:27,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:27,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:27,383 INFO L87 Difference]: Start difference. First operand 41940 states and 50946 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 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 11:49:28,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:28,446 INFO L93 Difference]: Finished difference Result 98164 states and 120488 transitions. [2022-07-13 11:49:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:28,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 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 192 [2022-07-13 11:49:28,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:28,561 INFO L225 Difference]: With dead ends: 98164 [2022-07-13 11:49:28,561 INFO L226 Difference]: Without dead ends: 57241 [2022-07-13 11:49:28,602 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 11:49:28,603 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 202 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:28,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 180 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:49:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57241 states. [2022-07-13 11:49:29,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57241 to 57213. [2022-07-13 11:49:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57213 states, 57212 states have (on average 1.2304411661889114) internal successors, (70396), 57212 states have internal predecessors, (70396), 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 11:49:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57213 states to 57213 states and 70396 transitions. [2022-07-13 11:49:29,635 INFO L78 Accepts]: Start accepts. Automaton has 57213 states and 70396 transitions. Word has length 192 [2022-07-13 11:49:29,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:29,636 INFO L495 AbstractCegarLoop]: Abstraction has 57213 states and 70396 transitions. [2022-07-13 11:49:29,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 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 11:49:29,636 INFO L276 IsEmpty]: Start isEmpty. Operand 57213 states and 70396 transitions. [2022-07-13 11:49:29,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-07-13 11:49:29,807 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:29,807 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, 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] [2022-07-13 11:49:29,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 11:49:29,823 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:29,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:29,824 INFO L85 PathProgramCache]: Analyzing trace with hash 305930593, now seen corresponding path program 1 times [2022-07-13 11:49:29,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:29,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880993643] [2022-07-13 11:49:29,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:29,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:29,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:29,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880993643] [2022-07-13 11:49:29,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880993643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:29,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:29,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:29,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381797371] [2022-07-13 11:49:29,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:29,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:29,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:29,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:29,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:29,944 INFO L87 Difference]: Start difference. First operand 57213 states and 70396 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 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 11:49:31,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:31,015 INFO L93 Difference]: Finished difference Result 137641 states and 169699 transitions. [2022-07-13 11:49:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:31,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 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 196 [2022-07-13 11:49:31,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:31,235 INFO L225 Difference]: With dead ends: 137641 [2022-07-13 11:49:31,236 INFO L226 Difference]: Without dead ends: 81445 [2022-07-13 11:49:31,289 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 11:49:31,290 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 226 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:31,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 164 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:49:31,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81445 states. [2022-07-13 11:49:32,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81445 to 81441. [2022-07-13 11:49:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81441 states, 81440 states have (on average 1.231630648330059) internal successors, (100304), 81440 states have internal predecessors, (100304), 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 11:49:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81441 states to 81441 states and 100304 transitions. [2022-07-13 11:49:32,632 INFO L78 Accepts]: Start accepts. Automaton has 81441 states and 100304 transitions. Word has length 196 [2022-07-13 11:49:32,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:32,633 INFO L495 AbstractCegarLoop]: Abstraction has 81441 states and 100304 transitions. [2022-07-13 11:49:32,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 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 11:49:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 81441 states and 100304 transitions. [2022-07-13 11:49:32,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-07-13 11:49:32,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:32,666 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2022-07-13 11:49:32,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 11:49:32,666 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:32,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:32,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2091308555, now seen corresponding path program 1 times [2022-07-13 11:49:32,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:32,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400020215] [2022-07-13 11:49:32,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:32,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 11:49:32,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:32,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400020215] [2022-07-13 11:49:32,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400020215] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:32,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:32,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:49:32,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464781818] [2022-07-13 11:49:32,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:32,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:49:32,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:32,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:49:32,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:49:32,781 INFO L87 Difference]: Start difference. First operand 81441 states and 100304 transitions. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 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 11:49:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:34,175 INFO L93 Difference]: Finished difference Result 206240 states and 254661 transitions. [2022-07-13 11:49:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:49:34,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 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 207 [2022-07-13 11:49:34,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:34,354 INFO L225 Difference]: With dead ends: 206240 [2022-07-13 11:49:34,354 INFO L226 Difference]: Without dead ends: 125816 [2022-07-13 11:49:34,411 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 11:49:34,412 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 546 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:34,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 476 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:49:34,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125816 states. [2022-07-13 11:49:36,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125816 to 125596. [2022-07-13 11:49:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125596 states, 125595 states have (on average 1.217588279788208) internal successors, (152923), 125595 states have internal predecessors, (152923), 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 11:49:36,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125596 states to 125596 states and 152923 transitions. [2022-07-13 11:49:36,499 INFO L78 Accepts]: Start accepts. Automaton has 125596 states and 152923 transitions. Word has length 207 [2022-07-13 11:49:36,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:36,499 INFO L495 AbstractCegarLoop]: Abstraction has 125596 states and 152923 transitions. [2022-07-13 11:49:36,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 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 11:49:36,500 INFO L276 IsEmpty]: Start isEmpty. Operand 125596 states and 152923 transitions. [2022-07-13 11:49:36,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-07-13 11:49:36,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:36,544 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:49:36,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 11:49:36,544 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:36,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:36,545 INFO L85 PathProgramCache]: Analyzing trace with hash -254767863, now seen corresponding path program 1 times [2022-07-13 11:49:36,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:36,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714000729] [2022-07-13 11:49:36,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:36,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 11:49:36,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:36,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714000729] [2022-07-13 11:49:36,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714000729] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:36,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:36,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:49:36,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569577792] [2022-07-13 11:49:36,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:36,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:36,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:36,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:36,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:36,640 INFO L87 Difference]: Start difference. First operand 125596 states and 152923 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 11:49:38,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:38,094 INFO L93 Difference]: Finished difference Result 217962 states and 268207 transitions. [2022-07-13 11:49:38,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:38,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 228 [2022-07-13 11:49:38,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:38,218 INFO L225 Difference]: With dead ends: 217962 [2022-07-13 11:49:38,218 INFO L226 Difference]: Without dead ends: 94810 [2022-07-13 11:49:38,288 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 11:49:38,299 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 171 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:38,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 370 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:49:38,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94810 states. [2022-07-13 11:49:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94810 to 88914. [2022-07-13 11:49:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88914 states, 88913 states have (on average 1.1646440902905086) internal successors, (103552), 88913 states have internal predecessors, (103552), 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 11:49:39,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88914 states to 88914 states and 103552 transitions. [2022-07-13 11:49:39,787 INFO L78 Accepts]: Start accepts. Automaton has 88914 states and 103552 transitions. Word has length 228 [2022-07-13 11:49:39,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:39,788 INFO L495 AbstractCegarLoop]: Abstraction has 88914 states and 103552 transitions. [2022-07-13 11:49:39,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 11:49:39,788 INFO L276 IsEmpty]: Start isEmpty. Operand 88914 states and 103552 transitions. [2022-07-13 11:49:39,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-07-13 11:49:39,812 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:39,814 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:49:39,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 11:49:39,815 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:39,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:39,816 INFO L85 PathProgramCache]: Analyzing trace with hash -621277898, now seen corresponding path program 1 times [2022-07-13 11:49:39,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:39,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915380817] [2022-07-13 11:49:39,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:39,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:39,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:39,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915380817] [2022-07-13 11:49:39,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915380817] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:39,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:39,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:39,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991448529] [2022-07-13 11:49:39,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:39,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:39,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:39,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:39,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:39,960 INFO L87 Difference]: Start difference. First operand 88914 states and 103552 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 states have internal predecessors, (236), 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 11:49:40,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:40,880 INFO L93 Difference]: Finished difference Result 168059 states and 195531 transitions. [2022-07-13 11:49:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:40,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 states have internal predecessors, (236), 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 236 [2022-07-13 11:49:40,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:40,987 INFO L225 Difference]: With dead ends: 168059 [2022-07-13 11:49:40,987 INFO L226 Difference]: Without dead ends: 88711 [2022-07-13 11:49:41,392 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 11:49:41,392 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:41,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 150 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:49:41,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88711 states. [2022-07-13 11:49:42,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88711 to 88711. [2022-07-13 11:49:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88711 states, 88710 states have (on average 1.1647503099988727) internal successors, (103325), 88710 states have internal predecessors, (103325), 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 11:49:42,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88711 states to 88711 states and 103325 transitions. [2022-07-13 11:49:42,541 INFO L78 Accepts]: Start accepts. Automaton has 88711 states and 103325 transitions. Word has length 236 [2022-07-13 11:49:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:42,542 INFO L495 AbstractCegarLoop]: Abstraction has 88711 states and 103325 transitions. [2022-07-13 11:49:42,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 states have internal predecessors, (236), 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 11:49:42,542 INFO L276 IsEmpty]: Start isEmpty. Operand 88711 states and 103325 transitions. [2022-07-13 11:49:42,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-07-13 11:49:42,569 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:42,569 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:49:42,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 11:49:42,570 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:42,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:42,570 INFO L85 PathProgramCache]: Analyzing trace with hash -805026293, now seen corresponding path program 1 times [2022-07-13 11:49:42,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:42,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947747431] [2022-07-13 11:49:42,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:42,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:42,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:42,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947747431] [2022-07-13 11:49:42,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947747431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:42,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:42,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:49:42,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699895016] [2022-07-13 11:49:42,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:42,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:49:42,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:42,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:49:42,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:49:42,695 INFO L87 Difference]: Start difference. First operand 88711 states and 103325 transitions. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 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 11:49:44,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:44,269 INFO L93 Difference]: Finished difference Result 170141 states and 198635 transitions. [2022-07-13 11:49:44,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:49:44,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 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 264 [2022-07-13 11:49:44,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:44,377 INFO L225 Difference]: With dead ends: 170141 [2022-07-13 11:49:44,377 INFO L226 Difference]: Without dead ends: 96485 [2022-07-13 11:49:44,401 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 11:49:44,402 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 360 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:44,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 114 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 11:49:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96485 states. [2022-07-13 11:49:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96485 to 93399. [2022-07-13 11:49:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93399 states, 93398 states have (on average 1.1642005182123814) internal successors, (108734), 93398 states have internal predecessors, (108734), 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 11:49:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93399 states to 93399 states and 108734 transitions. [2022-07-13 11:49:45,743 INFO L78 Accepts]: Start accepts. Automaton has 93399 states and 108734 transitions. Word has length 264 [2022-07-13 11:49:45,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:45,743 INFO L495 AbstractCegarLoop]: Abstraction has 93399 states and 108734 transitions. [2022-07-13 11:49:45,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 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 11:49:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 93399 states and 108734 transitions. [2022-07-13 11:49:45,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-07-13 11:49:45,776 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:45,777 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 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] [2022-07-13 11:49:45,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 11:49:45,777 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:45,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:45,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1682192666, now seen corresponding path program 1 times [2022-07-13 11:49:45,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:45,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159820187] [2022-07-13 11:49:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:45,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-13 11:49:45,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:45,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159820187] [2022-07-13 11:49:45,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159820187] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:45,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:45,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:49:45,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458592978] [2022-07-13 11:49:45,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:45,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:45,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:45,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:45,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:45,916 INFO L87 Difference]: Start difference. First operand 93399 states and 108734 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 11:49:47,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:47,211 INFO L93 Difference]: Finished difference Result 185792 states and 216123 transitions. [2022-07-13 11:49:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:47,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 284 [2022-07-13 11:49:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:47,333 INFO L225 Difference]: With dead ends: 185792 [2022-07-13 11:49:47,333 INFO L226 Difference]: Without dead ends: 85702 [2022-07-13 11:49:47,375 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 11:49:47,375 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 163 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:47,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 375 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:49:47,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85702 states. [2022-07-13 11:49:48,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85702 to 67382. [2022-07-13 11:49:48,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67382 states, 67381 states have (on average 1.1146465620872352) internal successors, (75106), 67381 states have internal predecessors, (75106), 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 11:49:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67382 states to 67382 states and 75106 transitions. [2022-07-13 11:49:48,424 INFO L78 Accepts]: Start accepts. Automaton has 67382 states and 75106 transitions. Word has length 284 [2022-07-13 11:49:48,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:48,424 INFO L495 AbstractCegarLoop]: Abstraction has 67382 states and 75106 transitions. [2022-07-13 11:49:48,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 11:49:48,425 INFO L276 IsEmpty]: Start isEmpty. Operand 67382 states and 75106 transitions. [2022-07-13 11:49:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-07-13 11:49:48,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:48,443 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:49:48,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 11:49:48,443 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1771235932, now seen corresponding path program 1 times [2022-07-13 11:49:48,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:48,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622895106] [2022-07-13 11:49:48,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:48,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:48,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:48,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622895106] [2022-07-13 11:49:48,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622895106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:48,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:48,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:49:48,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426239915] [2022-07-13 11:49:48,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:48,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:48,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:48,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:48,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:49:48,600 INFO L87 Difference]: Start difference. First operand 67382 states and 75106 transitions. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 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 11:49:49,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:49,326 INFO L93 Difference]: Finished difference Result 129072 states and 143708 transitions. [2022-07-13 11:49:49,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:49,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 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 292 [2022-07-13 11:49:49,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:49,399 INFO L225 Difference]: With dead ends: 129072 [2022-07-13 11:49:49,399 INFO L226 Difference]: Without dead ends: 69224 [2022-07-13 11:49:49,435 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 11:49:49,435 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 85 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:49,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 110 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:49:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69224 states. [2022-07-13 11:49:50,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69224 to 69006. [2022-07-13 11:49:50,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69006 states, 69005 states have (on average 1.1108180566625607) internal successors, (76652), 69005 states have internal predecessors, (76652), 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 11:49:50,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69006 states to 69006 states and 76652 transitions. [2022-07-13 11:49:50,446 INFO L78 Accepts]: Start accepts. Automaton has 69006 states and 76652 transitions. Word has length 292 [2022-07-13 11:49:50,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:50,446 INFO L495 AbstractCegarLoop]: Abstraction has 69006 states and 76652 transitions. [2022-07-13 11:49:50,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 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 11:49:50,447 INFO L276 IsEmpty]: Start isEmpty. Operand 69006 states and 76652 transitions. [2022-07-13 11:49:50,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-07-13 11:49:50,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:50,464 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:49:50,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 11:49:50,465 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:50,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:50,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2012492047, now seen corresponding path program 1 times [2022-07-13 11:49:50,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:50,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253203289] [2022-07-13 11:49:50,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:50,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 131 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:49:50,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:50,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253203289] [2022-07-13 11:49:50,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253203289] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:49:50,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862883011] [2022-07-13 11:49:50,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:50,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:50,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:50,743 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 11:49:50,746 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 11:49:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:50,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 11:49:50,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:49:51,305 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-07-13 11:49:51,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:49:51,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862883011] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:51,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:49:51,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-07-13 11:49:51,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716250505] [2022-07-13 11:49:51,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:51,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:49:51,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:51,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:49:51,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:49:51,308 INFO L87 Difference]: Start difference. First operand 69006 states and 76652 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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 11:49:52,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:52,540 INFO L93 Difference]: Finished difference Result 156757 states and 175249 transitions. [2022-07-13 11:49:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:49:52,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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 294 [2022-07-13 11:49:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:52,642 INFO L225 Difference]: With dead ends: 156757 [2022-07-13 11:49:52,642 INFO L226 Difference]: Without dead ends: 88770 [2022-07-13 11:49:52,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:49:52,687 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 93 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:52,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 88 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 11:49:52,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88770 states. [2022-07-13 11:49:53,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88770 to 86324. [2022-07-13 11:49:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86324 states, 86323 states have (on average 1.1125424278581606) internal successors, (96038), 86323 states have internal predecessors, (96038), 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 11:49:53,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86324 states to 86324 states and 96038 transitions. [2022-07-13 11:49:53,866 INFO L78 Accepts]: Start accepts. Automaton has 86324 states and 96038 transitions. Word has length 294 [2022-07-13 11:49:53,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:53,867 INFO L495 AbstractCegarLoop]: Abstraction has 86324 states and 96038 transitions. [2022-07-13 11:49:53,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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 11:49:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 86324 states and 96038 transitions. [2022-07-13 11:49:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-07-13 11:49:53,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:53,882 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:49:53,900 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 11:49:54,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 11:49:54,084 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:54,085 INFO L85 PathProgramCache]: Analyzing trace with hash 250008961, now seen corresponding path program 1 times [2022-07-13 11:49:54,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:54,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930806960] [2022-07-13 11:49:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:54,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-13 11:49:54,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:54,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930806960] [2022-07-13 11:49:54,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930806960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:54,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:49:54,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:49:54,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132612650] [2022-07-13 11:49:54,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:54,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:49:54,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:54,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:49:54,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:49:54,203 INFO L87 Difference]: Start difference. First operand 86324 states and 96038 transitions. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 3 states have internal predecessors, (249), 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 11:49:55,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:55,329 INFO L93 Difference]: Finished difference Result 166607 states and 185364 transitions. [2022-07-13 11:49:55,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:49:55,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2022-07-13 11:49:55,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:55,874 INFO L225 Difference]: With dead ends: 166607 [2022-07-13 11:49:55,874 INFO L226 Difference]: Without dead ends: 87003 [2022-07-13 11:49:55,939 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 11:49:55,950 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 366 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:55,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 99 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:49:56,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87003 states. [2022-07-13 11:49:56,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87003 to 85309. [2022-07-13 11:49:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85309 states, 85308 states have (on average 1.1124513527453463) internal successors, (94901), 85308 states have internal predecessors, (94901), 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 11:49:57,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85309 states to 85309 states and 94901 transitions. [2022-07-13 11:49:57,189 INFO L78 Accepts]: Start accepts. Automaton has 85309 states and 94901 transitions. Word has length 300 [2022-07-13 11:49:57,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:49:57,190 INFO L495 AbstractCegarLoop]: Abstraction has 85309 states and 94901 transitions. [2022-07-13 11:49:57,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 3 states have internal predecessors, (249), 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 11:49:57,190 INFO L276 IsEmpty]: Start isEmpty. Operand 85309 states and 94901 transitions. [2022-07-13 11:49:57,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-07-13 11:49:57,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:49:57,208 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:49:57,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 11:49:57,208 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:49:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:49:57,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1883543636, now seen corresponding path program 1 times [2022-07-13 11:49:57,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:49:57,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647656354] [2022-07-13 11:49:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:57,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:49:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 129 proven. 6 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-07-13 11:49:57,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:49:57,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647656354] [2022-07-13 11:49:57,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647656354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:49:57,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289030482] [2022-07-13 11:49:57,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:49:57,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:49:57,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:49:57,305 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 11:49:57,306 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 11:49:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:49:57,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 11:49:57,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:49:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 301 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 11:49:57,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:49:57,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289030482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:49:57,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:49:57,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2022-07-13 11:49:57,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609177125] [2022-07-13 11:49:57,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:49:57,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:49:57,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:49:57,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:49:57,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:49:57,698 INFO L87 Difference]: Start difference. First operand 85309 states and 94901 transitions. Second operand has 5 states, 5 states have (on average 60.4) internal successors, (302), 5 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:49:59,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:49:59,081 INFO L93 Difference]: Finished difference Result 227768 states and 252500 transitions. [2022-07-13 11:49:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:49:59,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 60.4) internal successors, (302), 5 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 307 [2022-07-13 11:49:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:49:59,244 INFO L225 Difference]: With dead ends: 227768 [2022-07-13 11:49:59,244 INFO L226 Difference]: Without dead ends: 143478 [2022-07-13 11:49:59,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:49:59,306 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 876 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:49:59,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 571 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 11:49:59,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143478 states. [2022-07-13 11:50:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143478 to 131456. [2022-07-13 11:50:01,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131456 states, 131455 states have (on average 1.1081738998136244) internal successors, (145675), 131455 states have internal predecessors, (145675), 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 11:50:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131456 states to 131456 states and 145675 transitions. [2022-07-13 11:50:01,442 INFO L78 Accepts]: Start accepts. Automaton has 131456 states and 145675 transitions. Word has length 307 [2022-07-13 11:50:01,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:50:01,443 INFO L495 AbstractCegarLoop]: Abstraction has 131456 states and 145675 transitions. [2022-07-13 11:50:01,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.4) internal successors, (302), 5 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:50:01,443 INFO L276 IsEmpty]: Start isEmpty. Operand 131456 states and 145675 transitions. [2022-07-13 11:50:01,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-07-13 11:50:01,462 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:50:01,463 INFO L195 NwaCegarLoop]: trace histogram [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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:50:01,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 11:50:01,679 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,SelfDestructingSolverStorable19 [2022-07-13 11:50:01,680 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:50:01,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:50:01,680 INFO L85 PathProgramCache]: Analyzing trace with hash -601397578, now seen corresponding path program 1 times [2022-07-13 11:50:01,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:50:01,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016832075] [2022-07-13 11:50:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:50:01,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:50:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:50:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 147 proven. 6 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-07-13 11:50:01,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:50:01,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016832075] [2022-07-13 11:50:01,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016832075] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:50:01,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806306141] [2022-07-13 11:50:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:50:01,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:50:01,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:50:01,783 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 11:50:01,810 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 11:50:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:50:01,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 11:50:01,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:50:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-07-13 11:50:02,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:50:02,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806306141] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:50:02,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:50:02,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-13 11:50:02,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163041910] [2022-07-13 11:50:02,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:50:02,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:50:02,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:50:02,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:50:02,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:50:02,116 INFO L87 Difference]: Start difference. First operand 131456 states and 145675 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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 11:50:03,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:50:03,452 INFO L93 Difference]: Finished difference Result 257461 states and 285598 transitions. [2022-07-13 11:50:03,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:50:03,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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 325 [2022-07-13 11:50:03,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:50:03,608 INFO L225 Difference]: With dead ends: 257461 [2022-07-13 11:50:03,608 INFO L226 Difference]: Without dead ends: 129667 [2022-07-13 11:50:03,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:50:03,677 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 69 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:50:03,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 116 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:50:03,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129667 states. [2022-07-13 11:50:05,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129667 to 127183. [2022-07-13 11:50:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127183 states, 127182 states have (on average 1.1046688996870626) internal successors, (140494), 127182 states have internal predecessors, (140494), 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 11:50:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127183 states to 127183 states and 140494 transitions. [2022-07-13 11:50:05,933 INFO L78 Accepts]: Start accepts. Automaton has 127183 states and 140494 transitions. Word has length 325 [2022-07-13 11:50:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:50:05,933 INFO L495 AbstractCegarLoop]: Abstraction has 127183 states and 140494 transitions. [2022-07-13 11:50:05,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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 11:50:05,934 INFO L276 IsEmpty]: Start isEmpty. Operand 127183 states and 140494 transitions. [2022-07-13 11:50:05,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-07-13 11:50:05,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:50:05,947 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:50:05,965 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 11:50:06,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:50:06,149 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:50:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:50:06,149 INFO L85 PathProgramCache]: Analyzing trace with hash -894238348, now seen corresponding path program 1 times [2022-07-13 11:50:06,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:50:06,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902233072] [2022-07-13 11:50:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:50:06,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:50:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:50:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-07-13 11:50:06,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:50:06,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902233072] [2022-07-13 11:50:06,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902233072] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:50:06,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188555201] [2022-07-13 11:50:06,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:50:06,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:50:06,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:50:06,301 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 11:50:06,302 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 11:50:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:50:06,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 11:50:06,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:50:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-13 11:50:06,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:50:06,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188555201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:50:06,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:50:06,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-13 11:50:06,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102912172] [2022-07-13 11:50:06,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:50:06,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:50:06,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:50:06,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:50:06,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:50:06,673 INFO L87 Difference]: Start difference. First operand 127183 states and 140494 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 11:50:07,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:50:07,662 INFO L93 Difference]: Finished difference Result 252999 states and 279486 transitions. [2022-07-13 11:50:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:50:07,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 336 [2022-07-13 11:50:07,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:50:07,810 INFO L225 Difference]: With dead ends: 252999 [2022-07-13 11:50:07,810 INFO L226 Difference]: Without dead ends: 126021 [2022-07-13 11:50:07,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:50:07,882 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 61 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:50:07,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 306 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:50:07,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126021 states. [2022-07-13 11:50:09,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126021 to 122918. [2022-07-13 11:50:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122918 states, 122917 states have (on average 1.1009136246410178) internal successors, (135321), 122917 states have internal predecessors, (135321), 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 11:50:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122918 states to 122918 states and 135321 transitions. [2022-07-13 11:50:09,871 INFO L78 Accepts]: Start accepts. Automaton has 122918 states and 135321 transitions. Word has length 336 [2022-07-13 11:50:09,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:50:09,871 INFO L495 AbstractCegarLoop]: Abstraction has 122918 states and 135321 transitions. [2022-07-13 11:50:09,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 11:50:09,871 INFO L276 IsEmpty]: Start isEmpty. Operand 122918 states and 135321 transitions. [2022-07-13 11:50:09,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-07-13 11:50:09,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:50:09,899 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:09,916 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 11:50:10,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:50:10,100 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:50:10,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:50:10,101 INFO L85 PathProgramCache]: Analyzing trace with hash -799616828, now seen corresponding path program 1 times [2022-07-13 11:50:10,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:50:10,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85947638] [2022-07-13 11:50:10,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:50:10,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:50:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:50:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 415 proven. 101 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-13 11:50:10,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:50:10,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85947638] [2022-07-13 11:50:10,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85947638] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:50:10,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626293732] [2022-07-13 11:50:10,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:50:10,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:50:10,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:50:10,416 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 11:50:10,443 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 11:50:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:50:10,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 11:50:10,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:50:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 413 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-07-13 11:50:10,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:50:10,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626293732] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:50:10,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:50:10,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-13 11:50:10,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977759254] [2022-07-13 11:50:10,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:50:10,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:50:10,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:50:10,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:50:10,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:50:10,669 INFO L87 Difference]: Start difference. First operand 122918 states and 135321 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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)