./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/Problem12_label01.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 65de5b720550425739629c673edc29b7a854e52f56e69a2e107d2cca3ffb2713 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 23:43:22,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 23:43:22,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 23:43:22,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 23:43:22,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 23:43:22,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 23:43:22,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 23:43:22,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 23:43:22,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 23:43:22,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 23:43:22,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 23:43:22,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 23:43:22,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 23:43:22,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 23:43:22,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 23:43:22,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 23:43:22,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 23:43:22,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 23:43:22,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 23:43:22,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 23:43:22,747 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 23:43:22,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 23:43:22,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 23:43:22,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 23:43:22,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 23:43:22,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 23:43:22,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 23:43:22,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 23:43:22,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 23:43:22,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 23:43:22,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 23:43:22,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 23:43:22,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 23:43:22,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 23:43:22,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 23:43:22,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 23:43:22,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 23:43:22,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 23:43:22,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 23:43:22,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 23:43:22,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 23:43:22,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 23:43:22,777 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 23:43:22,810 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 23:43:22,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 23:43:22,811 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 23:43:22,811 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 23:43:22,811 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 23:43:22,812 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 23:43:22,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 23:43:22,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 23:43:22,813 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 23:43:22,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 23:43:22,814 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 23:43:22,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 23:43:22,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 23:43:22,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 23:43:22,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 23:43:22,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 23:43:22,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 23:43:22,815 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 23:43:22,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 23:43:22,816 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 23:43:22,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 23:43:22,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 23:43:22,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 23:43:22,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 23:43:22,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:43:22,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 23:43:22,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 23:43:22,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 23:43:22,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 23:43:22,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 23:43:22,818 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 23:43:22,818 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 23:43:22,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 23:43:22,819 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65de5b720550425739629c673edc29b7a854e52f56e69a2e107d2cca3ffb2713 [2022-07-20 23:43:23,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 23:43:23,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 23:43:23,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 23:43:23,123 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 23:43:23,127 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 23:43:23,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label01.c [2022-07-20 23:43:23,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69915d144/48acadd110484170ab0bf105efec9dff/FLAG91b8685dc [2022-07-20 23:43:23,895 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 23:43:23,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label01.c [2022-07-20 23:43:23,917 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69915d144/48acadd110484170ab0bf105efec9dff/FLAG91b8685dc [2022-07-20 23:43:24,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69915d144/48acadd110484170ab0bf105efec9dff [2022-07-20 23:43:24,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 23:43:24,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 23:43:24,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 23:43:24,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 23:43:24,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 23:43:24,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:43:24" (1/1) ... [2022-07-20 23:43:24,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12f8d31a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:43:24, skipping insertion in model container [2022-07-20 23:43:24,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:43:24" (1/1) ... [2022-07-20 23:43:24,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 23:43:24,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 23:43:24,575 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/Problem12_label01.c[5916,5929] [2022-07-20 23:43:25,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:43:25,297 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 23:43:25,325 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/Problem12_label01.c[5916,5929] [2022-07-20 23:43:25,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:43:25,794 INFO L208 MainTranslator]: Completed translation [2022-07-20 23:43:25,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:43:25 WrapperNode [2022-07-20 23:43:25,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 23:43:25,796 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 23:43:25,796 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 23:43:25,797 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 23:43:25,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:43:25" (1/1) ... [2022-07-20 23:43:25,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:43:25" (1/1) ... [2022-07-20 23:43:26,299 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-07-20 23:43:26,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 23:43:26,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 23:43:26,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 23:43:26,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 23:43:26,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:43:25" (1/1) ... [2022-07-20 23:43:26,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:43:25" (1/1) ... [2022-07-20 23:43:26,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:43:25" (1/1) ... [2022-07-20 23:43:26,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:43:25" (1/1) ... [2022-07-20 23:43:26,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:43:25" (1/1) ... [2022-07-20 23:43:26,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:43:25" (1/1) ... [2022-07-20 23:43:26,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:43:25" (1/1) ... [2022-07-20 23:43:26,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 23:43:26,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 23:43:26,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 23:43:26,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 23:43:26,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:43:25" (1/1) ... [2022-07-20 23:43:26,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:43:26,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:43:26,809 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) [2022-07-20 23:43:26,845 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 [2022-07-20 23:43:26,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 23:43:26,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 23:43:26,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 23:43:26,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 23:43:27,015 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 23:43:27,017 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 23:43:30,216 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 23:43:30,229 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 23:43:30,230 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 23:43:30,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:43:30 BoogieIcfgContainer [2022-07-20 23:43:30,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 23:43:30,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 23:43:30,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 23:43:30,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 23:43:30,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:43:24" (1/3) ... [2022-07-20 23:43:30,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7cd73c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:43:30, skipping insertion in model container [2022-07-20 23:43:30,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:43:25" (2/3) ... [2022-07-20 23:43:30,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7cd73c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:43:30, skipping insertion in model container [2022-07-20 23:43:30,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:43:30" (3/3) ... [2022-07-20 23:43:30,240 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label01.c [2022-07-20 23:43:30,252 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 23:43:30,253 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 23:43:30,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 23:43:30,331 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@676c53da, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6560748 [2022-07-20 23:43:30,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 23:43:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 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) [2022-07-20 23:43:30,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-20 23:43:30,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:43:30,349 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] [2022-07-20 23:43:30,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:43:30,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:43:30,353 INFO L85 PathProgramCache]: Analyzing trace with hash 433832817, now seen corresponding path program 1 times [2022-07-20 23:43:30,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:43:30,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744930142] [2022-07-20 23:43:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:43:30,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:43:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:43:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:43:30,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:43:30,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744930142] [2022-07-20 23:43:30,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744930142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:43:30,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:43:30,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:43:30,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599991917] [2022-07-20 23:43:30,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:43:30,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:43:30,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:43:30,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:43:30,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:43:30,630 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 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 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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) [2022-07-20 23:43:33,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:43:33,901 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2022-07-20 23:43:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:43:33,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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 47 [2022-07-20 23:43:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:43:33,925 INFO L225 Difference]: With dead ends: 2388 [2022-07-20 23:43:33,925 INFO L226 Difference]: Without dead ends: 1506 [2022-07-20 23:43:33,932 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 [2022-07-20 23:43:33,934 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 787 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:43:33,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 481 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 23:43:33,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-07-20 23:43:34,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-07-20 23:43:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6385382059800664) internal successors, (2466), 1505 states have internal predecessors, (2466), 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) [2022-07-20 23:43:34,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2466 transitions. [2022-07-20 23:43:34,032 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2466 transitions. Word has length 47 [2022-07-20 23:43:34,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:43:34,032 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2466 transitions. [2022-07-20 23:43:34,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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) [2022-07-20 23:43:34,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2466 transitions. [2022-07-20 23:43:34,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-20 23:43:34,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:43:34,037 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:43:34,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 23:43:34,037 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:43:34,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:43:34,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1500828227, now seen corresponding path program 1 times [2022-07-20 23:43:34,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:43:34,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953367299] [2022-07-20 23:43:34,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:43:34,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:43:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:43:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:43:34,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:43:34,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953367299] [2022-07-20 23:43:34,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953367299] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:43:34,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:43:34,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:43:34,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391172159] [2022-07-20 23:43:34,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:43:34,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:43:34,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:43:34,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:43:34,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:43:34,306 INFO L87 Difference]: Start difference. First operand 1506 states and 2466 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 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) [2022-07-20 23:43:38,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:43:38,433 INFO L93 Difference]: Finished difference Result 4551 states and 7431 transitions. [2022-07-20 23:43:38,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:43:38,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 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 118 [2022-07-20 23:43:38,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:43:38,445 INFO L225 Difference]: With dead ends: 4551 [2022-07-20 23:43:38,445 INFO L226 Difference]: Without dead ends: 3010 [2022-07-20 23:43:38,448 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 [2022-07-20 23:43:38,449 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 692 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3734 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 4397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 3734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:43:38,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 658 Invalid, 4397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 3734 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-07-20 23:43:38,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2022-07-20 23:43:38,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 3008. [2022-07-20 23:43:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.3418689723977386) internal successors, (4035), 3007 states have internal predecessors, (4035), 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) [2022-07-20 23:43:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4035 transitions. [2022-07-20 23:43:38,501 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4035 transitions. Word has length 118 [2022-07-20 23:43:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:43:38,502 INFO L495 AbstractCegarLoop]: Abstraction has 3008 states and 4035 transitions. [2022-07-20 23:43:38,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 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) [2022-07-20 23:43:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4035 transitions. [2022-07-20 23:43:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-20 23:43:38,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:43:38,507 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:43:38,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 23:43:38,508 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:43:38,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:43:38,508 INFO L85 PathProgramCache]: Analyzing trace with hash -94536638, now seen corresponding path program 1 times [2022-07-20 23:43:38,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:43:38,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818771013] [2022-07-20 23:43:38,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:43:38,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:43:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:43:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:43:38,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:43:38,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818771013] [2022-07-20 23:43:38,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818771013] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:43:38,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:43:38,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:43:38,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344568834] [2022-07-20 23:43:38,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:43:38,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:43:38,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:43:38,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:43:38,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:43:38,681 INFO L87 Difference]: Start difference. First operand 3008 states and 4035 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 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) [2022-07-20 23:43:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:43:42,524 INFO L93 Difference]: Finished difference Result 9769 states and 12895 transitions. [2022-07-20 23:43:42,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:43:42,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 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 156 [2022-07-20 23:43:42,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:43:42,558 INFO L225 Difference]: With dead ends: 9769 [2022-07-20 23:43:42,558 INFO L226 Difference]: Without dead ends: 6763 [2022-07-20 23:43:42,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 23:43:42,569 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 2094 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4274 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2094 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 4841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 4274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-20 23:43:42,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2094 Valid, 451 Invalid, 4841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 4274 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-20 23:43:42,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2022-07-20 23:43:42,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2022-07-20 23:43:42,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.2877846790890268) internal successors, (8708), 6762 states have internal predecessors, (8708), 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) [2022-07-20 23:43:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 8708 transitions. [2022-07-20 23:43:42,741 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 8708 transitions. Word has length 156 [2022-07-20 23:43:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:43:42,742 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 8708 transitions. [2022-07-20 23:43:42,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 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) [2022-07-20 23:43:42,742 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 8708 transitions. [2022-07-20 23:43:42,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-07-20 23:43:42,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:43:42,750 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:43:42,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 23:43:42,750 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:43:42,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:43:42,753 INFO L85 PathProgramCache]: Analyzing trace with hash -282317822, now seen corresponding path program 1 times [2022-07-20 23:43:42,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:43:42,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859693467] [2022-07-20 23:43:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:43:42,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:43:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:43:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-20 23:43:42,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:43:42,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859693467] [2022-07-20 23:43:42,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859693467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:43:42,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:43:42,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:43:42,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133763204] [2022-07-20 23:43:42,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:43:42,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:43:42,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:43:42,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:43:42,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:43:42,998 INFO L87 Difference]: Start difference. First operand 6763 states and 8708 transitions. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 3 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) [2022-07-20 23:43:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:43:46,123 INFO L93 Difference]: Finished difference Result 15816 states and 21400 transitions. [2022-07-20 23:43:46,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:43:46,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 3 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 259 [2022-07-20 23:43:46,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:43:46,160 INFO L225 Difference]: With dead ends: 15816 [2022-07-20 23:43:46,160 INFO L226 Difference]: Without dead ends: 9769 [2022-07-20 23:43:46,169 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 [2022-07-20 23:43:46,176 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 851 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3465 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 4018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 3465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:43:46,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 494 Invalid, 4018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 3465 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-20 23:43:46,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9769 states. [2022-07-20 23:43:46,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9769 to 9767. [2022-07-20 23:43:46,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.2733975015359411) internal successors, (12436), 9766 states have internal predecessors, (12436), 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) [2022-07-20 23:43:46,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12436 transitions. [2022-07-20 23:43:46,344 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12436 transitions. Word has length 259 [2022-07-20 23:43:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:43:46,345 INFO L495 AbstractCegarLoop]: Abstraction has 9767 states and 12436 transitions. [2022-07-20 23:43:46,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 3 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) [2022-07-20 23:43:46,346 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12436 transitions. [2022-07-20 23:43:46,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-07-20 23:43:46,349 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:43:46,350 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:43:46,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 23:43:46,350 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:43:46,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:43:46,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1708577746, now seen corresponding path program 1 times [2022-07-20 23:43:46,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:43:46,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295802512] [2022-07-20 23:43:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:43:46,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:43:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:43:46,495 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-20 23:43:46,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:43:46,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295802512] [2022-07-20 23:43:46,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295802512] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:43:46,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:43:46,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:43:46,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513227068] [2022-07-20 23:43:46,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:43:46,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:43:46,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:43:46,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:43:46,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:43:46,498 INFO L87 Difference]: Start difference. First operand 9767 states and 12436 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) [2022-07-20 23:43:48,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:43:48,985 INFO L93 Difference]: Finished difference Result 26291 states and 34162 transitions. [2022-07-20 23:43:48,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:43:48,988 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 262 [2022-07-20 23:43:48,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:43:49,044 INFO L225 Difference]: With dead ends: 26291 [2022-07-20 23:43:49,045 INFO L226 Difference]: Without dead ends: 17277 [2022-07-20 23:43:49,061 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 [2022-07-20 23:43:49,062 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 619 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2021 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 2815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 2021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:43:49,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 598 Invalid, 2815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [794 Valid, 2021 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 23:43:49,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17277 states. [2022-07-20 23:43:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17277 to 17277. [2022-07-20 23:43:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17277 states, 17276 states have (on average 1.1980203750868257) internal successors, (20697), 17276 states have internal predecessors, (20697), 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) [2022-07-20 23:43:49,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17277 states to 17277 states and 20697 transitions. [2022-07-20 23:43:49,359 INFO L78 Accepts]: Start accepts. Automaton has 17277 states and 20697 transitions. Word has length 262 [2022-07-20 23:43:49,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:43:49,360 INFO L495 AbstractCegarLoop]: Abstraction has 17277 states and 20697 transitions. [2022-07-20 23:43:49,361 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) [2022-07-20 23:43:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 17277 states and 20697 transitions. [2022-07-20 23:43:49,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-07-20 23:43:49,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:43:49,368 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:43:49,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 23:43:49,369 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:43:49,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:43:49,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1863466117, now seen corresponding path program 1 times [2022-07-20 23:43:49,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:43:49,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197586084] [2022-07-20 23:43:49,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:43:49,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:43:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:43:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 23:43:49,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:43:49,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197586084] [2022-07-20 23:43:49,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197586084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:43:49,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:43:49,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:43:49,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523305627] [2022-07-20 23:43:49,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:43:49,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:43:49,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:43:49,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:43:49,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:43:49,517 INFO L87 Difference]: Start difference. First operand 17277 states and 20697 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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) [2022-07-20 23:43:52,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:43:52,272 INFO L93 Difference]: Finished difference Result 33801 states and 40636 transitions. [2022-07-20 23:43:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:43:52,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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 277 [2022-07-20 23:43:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:43:52,303 INFO L225 Difference]: With dead ends: 33801 [2022-07-20 23:43:52,304 INFO L226 Difference]: Without dead ends: 17277 [2022-07-20 23:43:52,325 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 [2022-07-20 23:43:52,326 INFO L413 NwaCegarLoop]: 1233 mSDtfsCounter, 696 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2429 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 2429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:43:52,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 1241 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 2429 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-20 23:43:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17277 states. [2022-07-20 23:43:52,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17277 to 16526. [2022-07-20 23:43:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16526 states, 16525 states have (on average 1.1696217851739787) internal successors, (19328), 16525 states have internal predecessors, (19328), 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) [2022-07-20 23:43:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16526 states to 16526 states and 19328 transitions. [2022-07-20 23:43:52,556 INFO L78 Accepts]: Start accepts. Automaton has 16526 states and 19328 transitions. Word has length 277 [2022-07-20 23:43:52,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:43:52,557 INFO L495 AbstractCegarLoop]: Abstraction has 16526 states and 19328 transitions. [2022-07-20 23:43:52,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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) [2022-07-20 23:43:52,557 INFO L276 IsEmpty]: Start isEmpty. Operand 16526 states and 19328 transitions. [2022-07-20 23:43:52,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-07-20 23:43:52,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:43:52,561 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:43:52,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 23:43:52,561 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:43:52,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:43:52,562 INFO L85 PathProgramCache]: Analyzing trace with hash 268294806, now seen corresponding path program 1 times [2022-07-20 23:43:52,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:43:52,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134954438] [2022-07-20 23:43:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:43:52,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:43:52,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:43:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-07-20 23:43:52,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:43:52,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134954438] [2022-07-20 23:43:52,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134954438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:43:52,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:43:52,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:43:52,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899827685] [2022-07-20 23:43:52,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:43:52,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:43:52,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:43:52,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:43:52,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:43:52,708 INFO L87 Difference]: Start difference. First operand 16526 states and 19328 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2022-07-20 23:43:55,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:43:55,076 INFO L93 Difference]: Finished difference Result 38307 states and 44492 transitions. [2022-07-20 23:43:55,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:43:55,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 278 [2022-07-20 23:43:55,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:43:55,118 INFO L225 Difference]: With dead ends: 38307 [2022-07-20 23:43:55,118 INFO L226 Difference]: Without dead ends: 22534 [2022-07-20 23:43:55,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:43:55,142 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 820 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 23:43:55,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 106 Invalid, 2743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 2285 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 23:43:55,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2022-07-20 23:43:55,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 19530. [2022-07-20 23:43:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19530 states, 19529 states have (on average 1.1496236366429413) internal successors, (22451), 19529 states have internal predecessors, (22451), 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) [2022-07-20 23:43:55,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19530 states to 19530 states and 22451 transitions. [2022-07-20 23:43:55,461 INFO L78 Accepts]: Start accepts. Automaton has 19530 states and 22451 transitions. Word has length 278 [2022-07-20 23:43:55,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:43:55,462 INFO L495 AbstractCegarLoop]: Abstraction has 19530 states and 22451 transitions. [2022-07-20 23:43:55,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2022-07-20 23:43:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 19530 states and 22451 transitions. [2022-07-20 23:43:55,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-07-20 23:43:55,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:43:55,468 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-20 23:43:55,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 23:43:55,468 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:43:55,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:43:55,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1094495380, now seen corresponding path program 1 times [2022-07-20 23:43:55,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:43:55,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260376787] [2022-07-20 23:43:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:43:55,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:43:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:43:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 23:43:55,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:43:55,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260376787] [2022-07-20 23:43:55,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260376787] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:43:55,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:43:55,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:43:55,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705773762] [2022-07-20 23:43:55,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:43:55,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:43:55,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:43:55,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:43:55,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:43:55,606 INFO L87 Difference]: Start difference. First operand 19530 states and 22451 transitions. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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) [2022-07-20 23:43:57,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:43:57,904 INFO L93 Difference]: Finished difference Result 45817 states and 53568 transitions. [2022-07-20 23:43:57,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:43:57,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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 346 [2022-07-20 23:43:57,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:43:57,957 INFO L225 Difference]: With dead ends: 45817 [2022-07-20 23:43:57,958 INFO L226 Difference]: Without dead ends: 27040 [2022-07-20 23:43:57,979 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 [2022-07-20 23:43:57,980 INFO L413 NwaCegarLoop]: 1196 mSDtfsCounter, 704 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2238 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 2671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 2238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:43:57,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 1204 Invalid, 2671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 2238 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-20 23:43:58,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27040 states. [2022-07-20 23:43:58,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27040 to 27040. [2022-07-20 23:43:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27040 states, 27039 states have (on average 1.13243832981989) internal successors, (30620), 27039 states have internal predecessors, (30620), 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) [2022-07-20 23:43:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 30620 transitions. [2022-07-20 23:43:58,289 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 30620 transitions. Word has length 346 [2022-07-20 23:43:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:43:58,290 INFO L495 AbstractCegarLoop]: Abstraction has 27040 states and 30620 transitions. [2022-07-20 23:43:58,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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) [2022-07-20 23:43:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 30620 transitions. [2022-07-20 23:43:58,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-07-20 23:43:58,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:43:58,298 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:43:58,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 23:43:58,300 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:43:58,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:43:58,300 INFO L85 PathProgramCache]: Analyzing trace with hash 34930938, now seen corresponding path program 1 times [2022-07-20 23:43:58,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:43:58,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167053987] [2022-07-20 23:43:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:43:58,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:43:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:43:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 23:43:58,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:43:58,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167053987] [2022-07-20 23:43:58,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167053987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:43:58,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:43:58,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:43:58,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124333719] [2022-07-20 23:43:58,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:43:58,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:43:58,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:43:58,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:43:58,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:43:58,523 INFO L87 Difference]: Start difference. First operand 27040 states and 30620 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 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) [2022-07-20 23:44:01,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:44:01,125 INFO L93 Difference]: Finished difference Result 67596 states and 76817 transitions. [2022-07-20 23:44:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:44:01,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 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 374 [2022-07-20 23:44:01,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:44:01,191 INFO L225 Difference]: With dead ends: 67596 [2022-07-20 23:44:01,191 INFO L226 Difference]: Without dead ends: 41309 [2022-07-20 23:44:01,219 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 [2022-07-20 23:44:01,222 INFO L413 NwaCegarLoop]: 1215 mSDtfsCounter, 645 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:44:01,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 1222 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 2602 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 23:44:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41309 states. [2022-07-20 23:44:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41309 to 40558. [2022-07-20 23:44:01,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40558 states, 40557 states have (on average 1.126537958922011) internal successors, (45689), 40557 states have internal predecessors, (45689), 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) [2022-07-20 23:44:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40558 states to 40558 states and 45689 transitions. [2022-07-20 23:44:01,635 INFO L78 Accepts]: Start accepts. Automaton has 40558 states and 45689 transitions. Word has length 374 [2022-07-20 23:44:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:44:01,636 INFO L495 AbstractCegarLoop]: Abstraction has 40558 states and 45689 transitions. [2022-07-20 23:44:01,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 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) [2022-07-20 23:44:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 40558 states and 45689 transitions. [2022-07-20 23:44:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2022-07-20 23:44:01,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:44:01,648 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:44:01,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 23:44:01,649 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:44:01,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:44:01,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1471075396, now seen corresponding path program 1 times [2022-07-20 23:44:01,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:44:01,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856498969] [2022-07-20 23:44:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:01,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:44:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-20 23:44:01,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:44:01,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856498969] [2022-07-20 23:44:01,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856498969] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:44:01,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:44:01,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:44:01,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256275933] [2022-07-20 23:44:01,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:44:01,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:44:01,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:44:01,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:44:01,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:44:01,910 INFO L87 Difference]: Start difference. First operand 40558 states and 45689 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2022-07-20 23:44:04,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:44:04,534 INFO L93 Difference]: Finished difference Result 98387 states and 112071 transitions. [2022-07-20 23:44:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:44:04,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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 378 [2022-07-20 23:44:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:44:04,602 INFO L225 Difference]: With dead ends: 98387 [2022-07-20 23:44:04,603 INFO L226 Difference]: Without dead ends: 53325 [2022-07-20 23:44:04,642 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 [2022-07-20 23:44:04,643 INFO L413 NwaCegarLoop]: 1286 mSDtfsCounter, 746 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2209 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 2820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 2209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 23:44:04,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 1294 Invalid, 2820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 2209 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 23:44:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53325 states. [2022-07-20 23:44:05,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53325 to 52574. [2022-07-20 23:44:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52574 states, 52573 states have (on average 1.1147547220055922) internal successors, (58606), 52573 states have internal predecessors, (58606), 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) [2022-07-20 23:44:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52574 states to 52574 states and 58606 transitions. [2022-07-20 23:44:05,343 INFO L78 Accepts]: Start accepts. Automaton has 52574 states and 58606 transitions. Word has length 378 [2022-07-20 23:44:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:44:05,344 INFO L495 AbstractCegarLoop]: Abstraction has 52574 states and 58606 transitions. [2022-07-20 23:44:05,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2022-07-20 23:44:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 52574 states and 58606 transitions. [2022-07-20 23:44:05,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2022-07-20 23:44:05,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:44:05,359 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-07-20 23:44:05,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 23:44:05,360 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:44:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:44:05,360 INFO L85 PathProgramCache]: Analyzing trace with hash -219790699, now seen corresponding path program 1 times [2022-07-20 23:44:05,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:44:05,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702990695] [2022-07-20 23:44:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:05,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:44:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 554 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-20 23:44:05,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:44:05,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702990695] [2022-07-20 23:44:05,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702990695] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:44:05,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:44:05,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:44:05,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865573694] [2022-07-20 23:44:05,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:44:05,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:44:05,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:44:05,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:44:05,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:44:05,545 INFO L87 Difference]: Start difference. First operand 52574 states and 58606 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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) [2022-07-20 23:44:08,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:44:08,148 INFO L93 Difference]: Finished difference Result 105146 states and 117234 transitions. [2022-07-20 23:44:08,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:44:08,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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 450 [2022-07-20 23:44:08,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:44:08,574 INFO L225 Difference]: With dead ends: 105146 [2022-07-20 23:44:08,574 INFO L226 Difference]: Without dead ends: 53325 [2022-07-20 23:44:08,591 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 [2022-07-20 23:44:08,593 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 705 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 2889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 23:44:08,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 260 Invalid, 2889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 23:44:08,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53325 states. [2022-07-20 23:44:08,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53325 to 51072. [2022-07-20 23:44:08,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51072 states, 51071 states have (on average 1.112138003955278) internal successors, (56798), 51071 states have internal predecessors, (56798), 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) [2022-07-20 23:44:09,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51072 states to 51072 states and 56798 transitions. [2022-07-20 23:44:09,050 INFO L78 Accepts]: Start accepts. Automaton has 51072 states and 56798 transitions. Word has length 450 [2022-07-20 23:44:09,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:44:09,051 INFO L495 AbstractCegarLoop]: Abstraction has 51072 states and 56798 transitions. [2022-07-20 23:44:09,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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) [2022-07-20 23:44:09,051 INFO L276 IsEmpty]: Start isEmpty. Operand 51072 states and 56798 transitions. [2022-07-20 23:44:09,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2022-07-20 23:44:09,062 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:44:09,062 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-07-20 23:44:09,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 23:44:09,062 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:44:09,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:44:09,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1195609237, now seen corresponding path program 1 times [2022-07-20 23:44:09,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:44:09,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551469386] [2022-07-20 23:44:09,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:09,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:44:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 563 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-07-20 23:44:09,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:44:09,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551469386] [2022-07-20 23:44:09,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551469386] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:44:09,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:44:09,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:44:09,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966419884] [2022-07-20 23:44:09,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:44:09,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:44:09,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:44:09,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:44:09,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:44:09,342 INFO L87 Difference]: Start difference. First operand 51072 states and 56798 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2022-07-20 23:44:11,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:44:11,918 INFO L93 Difference]: Finished difference Result 104395 states and 115909 transitions. [2022-07-20 23:44:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:44:11,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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 461 [2022-07-20 23:44:11,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:44:11,982 INFO L225 Difference]: With dead ends: 104395 [2022-07-20 23:44:11,983 INFO L226 Difference]: Without dead ends: 54076 [2022-07-20 23:44:12,011 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 [2022-07-20 23:44:12,012 INFO L413 NwaCegarLoop]: 1169 mSDtfsCounter, 738 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 2669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 596 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 23:44:12,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 1176 Invalid, 2669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [596 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 23:44:12,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54076 states. [2022-07-20 23:44:12,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54076 to 52574. [2022-07-20 23:44:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52574 states, 52573 states have (on average 1.071177220246134) internal successors, (56315), 52573 states have internal predecessors, (56315), 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) [2022-07-20 23:44:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52574 states to 52574 states and 56315 transitions. [2022-07-20 23:44:12,598 INFO L78 Accepts]: Start accepts. Automaton has 52574 states and 56315 transitions. Word has length 461 [2022-07-20 23:44:12,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:44:12,599 INFO L495 AbstractCegarLoop]: Abstraction has 52574 states and 56315 transitions. [2022-07-20 23:44:12,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2022-07-20 23:44:12,599 INFO L276 IsEmpty]: Start isEmpty. Operand 52574 states and 56315 transitions. [2022-07-20 23:44:12,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2022-07-20 23:44:12,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:44:12,611 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:44:12,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 23:44:12,612 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:44:12,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:44:12,612 INFO L85 PathProgramCache]: Analyzing trace with hash -940077494, now seen corresponding path program 1 times [2022-07-20 23:44:12,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:44:12,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569075475] [2022-07-20 23:44:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:12,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:44:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 579 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-20 23:44:12,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:44:12,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569075475] [2022-07-20 23:44:12,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569075475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:44:12,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:44:12,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:44:12,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455559647] [2022-07-20 23:44:12,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:44:12,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:44:12,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:44:12,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:44:12,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:44:12,944 INFO L87 Difference]: Start difference. First operand 52574 states and 56315 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2022-07-20 23:44:15,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:44:15,774 INFO L93 Difference]: Finished difference Result 143447 states and 154116 transitions. [2022-07-20 23:44:15,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:44:15,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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 488 [2022-07-20 23:44:15,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:44:15,880 INFO L225 Difference]: With dead ends: 143447 [2022-07-20 23:44:15,880 INFO L226 Difference]: Without dead ends: 91626 [2022-07-20 23:44:15,916 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 [2022-07-20 23:44:15,916 INFO L413 NwaCegarLoop]: 1311 mSDtfsCounter, 656 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 2851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:44:15,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 1319 Invalid, 2851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 2343 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 23:44:15,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91626 states. [2022-07-20 23:44:16,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91626 to 82614. [2022-07-20 23:44:16,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82614 states, 82613 states have (on average 1.060474743684408) internal successors, (87609), 82613 states have internal predecessors, (87609), 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) [2022-07-20 23:44:17,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82614 states to 82614 states and 87609 transitions. [2022-07-20 23:44:17,097 INFO L78 Accepts]: Start accepts. Automaton has 82614 states and 87609 transitions. Word has length 488 [2022-07-20 23:44:17,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:44:17,098 INFO L495 AbstractCegarLoop]: Abstraction has 82614 states and 87609 transitions. [2022-07-20 23:44:17,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2022-07-20 23:44:17,098 INFO L276 IsEmpty]: Start isEmpty. Operand 82614 states and 87609 transitions. [2022-07-20 23:44:17,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2022-07-20 23:44:17,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:44:17,116 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:44:17,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 23:44:17,116 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:44:17,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:44:17,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1231520266, now seen corresponding path program 1 times [2022-07-20 23:44:17,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:44:17,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606867419] [2022-07-20 23:44:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:17,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:44:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 571 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-20 23:44:17,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:44:17,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606867419] [2022-07-20 23:44:17,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606867419] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:44:17,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:44:17,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:44:17,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598404566] [2022-07-20 23:44:17,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:44:17,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:44:17,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:44:17,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:44:17,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:44:17,284 INFO L87 Difference]: Start difference. First operand 82614 states and 87609 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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) [2022-07-20 23:44:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:44:20,218 INFO L93 Difference]: Finished difference Result 186254 states and 198757 transitions. [2022-07-20 23:44:20,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:44:20,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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 488 [2022-07-20 23:44:20,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:44:20,348 INFO L225 Difference]: With dead ends: 186254 [2022-07-20 23:44:20,348 INFO L226 Difference]: Without dead ends: 104393 [2022-07-20 23:44:20,521 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 [2022-07-20 23:44:20,522 INFO L413 NwaCegarLoop]: 1270 mSDtfsCounter, 668 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2229 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:44:20,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 1278 Invalid, 2673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2229 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 23:44:20,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104393 states. [2022-07-20 23:44:21,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104393 to 101389. [2022-07-20 23:44:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101389 states, 101388 states have (on average 1.055479938454255) internal successors, (107013), 101388 states have internal predecessors, (107013), 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) [2022-07-20 23:44:21,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101389 states to 101389 states and 107013 transitions. [2022-07-20 23:44:21,656 INFO L78 Accepts]: Start accepts. Automaton has 101389 states and 107013 transitions. Word has length 488 [2022-07-20 23:44:21,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:44:21,656 INFO L495 AbstractCegarLoop]: Abstraction has 101389 states and 107013 transitions. [2022-07-20 23:44:21,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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) [2022-07-20 23:44:21,657 INFO L276 IsEmpty]: Start isEmpty. Operand 101389 states and 107013 transitions. [2022-07-20 23:44:21,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-07-20 23:44:21,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:44:21,665 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:44:21,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 23:44:21,665 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:44:21,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:44:21,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1212922014, now seen corresponding path program 1 times [2022-07-20 23:44:21,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:44:21,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701088813] [2022-07-20 23:44:21,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:21,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:44:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 419 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-07-20 23:44:22,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:44:22,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701088813] [2022-07-20 23:44:22,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701088813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:44:22,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:44:22,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:44:22,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888637592] [2022-07-20 23:44:22,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:44:22,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:44:22,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:44:22,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:44:22,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:44:22,079 INFO L87 Difference]: Start difference. First operand 101389 states and 107013 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 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) [2022-07-20 23:44:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:44:24,727 INFO L93 Difference]: Finished difference Result 205780 states and 217112 transitions. [2022-07-20 23:44:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:44:24,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 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 536 [2022-07-20 23:44:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:44:24,861 INFO L225 Difference]: With dead ends: 205780 [2022-07-20 23:44:24,861 INFO L226 Difference]: Without dead ends: 102891 [2022-07-20 23:44:24,901 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 [2022-07-20 23:44:24,902 INFO L413 NwaCegarLoop]: 1298 mSDtfsCounter, 675 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 2336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:44:24,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 1305 Invalid, 2336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 23:44:24,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102891 states. [2022-07-20 23:44:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102891 to 102891. [2022-07-20 23:44:25,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102891 states, 102890 states have (on average 1.0535134609777432) internal successors, (108396), 102890 states have internal predecessors, (108396), 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) [2022-07-20 23:44:26,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102891 states to 102891 states and 108396 transitions. [2022-07-20 23:44:26,111 INFO L78 Accepts]: Start accepts. Automaton has 102891 states and 108396 transitions. Word has length 536 [2022-07-20 23:44:26,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:44:26,111 INFO L495 AbstractCegarLoop]: Abstraction has 102891 states and 108396 transitions. [2022-07-20 23:44:26,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 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) [2022-07-20 23:44:26,112 INFO L276 IsEmpty]: Start isEmpty. Operand 102891 states and 108396 transitions. [2022-07-20 23:44:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-07-20 23:44:26,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:44:26,119 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:44:26,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 23:44:26,120 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:44:26,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:44:26,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1768587887, now seen corresponding path program 1 times [2022-07-20 23:44:26,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:44:26,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922416708] [2022-07-20 23:44:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:26,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:44:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 398 proven. 240 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-20 23:44:26,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:44:26,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922416708] [2022-07-20 23:44:26,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922416708] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:44:26,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925992881] [2022-07-20 23:44:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:26,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:44:26,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:44:26,414 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) [2022-07-20 23:44:26,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 23:44:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:26,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:44:26,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:44:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-07-20 23:44:27,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:44:27,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925992881] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:44:27,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:44:27,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-20 23:44:27,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188137735] [2022-07-20 23:44:27,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:44:27,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:44:27,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:44:27,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:44:27,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-20 23:44:27,002 INFO L87 Difference]: Start difference. First operand 102891 states and 108396 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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) [2022-07-20 23:44:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:44:30,028 INFO L93 Difference]: Finished difference Result 221551 states and 233499 transitions. [2022-07-20 23:44:30,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:44:30,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 542 [2022-07-20 23:44:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:44:30,169 INFO L225 Difference]: With dead ends: 221551 [2022-07-20 23:44:30,169 INFO L226 Difference]: Without dead ends: 119413 [2022-07-20 23:44:30,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-20 23:44:30,201 INFO L413 NwaCegarLoop]: 1109 mSDtfsCounter, 827 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2158 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 2158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 23:44:30,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [827 Valid, 1117 Invalid, 2549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 2158 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 23:44:30,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119413 states. [2022-07-20 23:44:31,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119413 to 117160. [2022-07-20 23:44:31,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117160 states, 117159 states have (on average 1.0493602710845944) internal successors, (122942), 117159 states have internal predecessors, (122942), 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) [2022-07-20 23:44:31,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117160 states to 117160 states and 122942 transitions. [2022-07-20 23:44:31,833 INFO L78 Accepts]: Start accepts. Automaton has 117160 states and 122942 transitions. Word has length 542 [2022-07-20 23:44:31,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:44:31,834 INFO L495 AbstractCegarLoop]: Abstraction has 117160 states and 122942 transitions. [2022-07-20 23:44:31,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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) [2022-07-20 23:44:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 117160 states and 122942 transitions. [2022-07-20 23:44:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2022-07-20 23:44:31,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:44:31,854 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:44:31,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 23:44:32,055 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,SelfDestructingSolverStorable15 [2022-07-20 23:44:32,056 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:44:32,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:44:32,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1478363861, now seen corresponding path program 1 times [2022-07-20 23:44:32,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:44:32,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571267839] [2022-07-20 23:44:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:32,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:44:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 451 proven. 360 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-20 23:44:32,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:44:32,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571267839] [2022-07-20 23:44:32,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571267839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:44:32,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116644799] [2022-07-20 23:44:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:32,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:44:32,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:44:32,526 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) [2022-07-20 23:44:32,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 23:44:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:32,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 23:44:32,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:44:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 592 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-07-20 23:44:34,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:44:34,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116644799] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:44:34,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:44:34,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-20 23:44:34,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840016100] [2022-07-20 23:44:34,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:44:34,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:44:34,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:44:34,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:44:34,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-20 23:44:34,078 INFO L87 Difference]: Start difference. First operand 117160 states and 122942 transitions. Second operand has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 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) [2022-07-20 23:44:36,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:44:36,872 INFO L93 Difference]: Finished difference Result 235069 states and 246634 transitions. [2022-07-20 23:44:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:44:36,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 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 725 [2022-07-20 23:44:36,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:44:37,001 INFO L225 Difference]: With dead ends: 235069 [2022-07-20 23:44:37,001 INFO L226 Difference]: Without dead ends: 117160 [2022-07-20 23:44:37,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-20 23:44:37,036 INFO L413 NwaCegarLoop]: 1343 mSDtfsCounter, 489 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2010 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:44:37,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 1351 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2010 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 23:44:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117160 states. [2022-07-20 23:44:38,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117160 to 116409. [2022-07-20 23:44:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116409 states, 116408 states have (on average 1.045684145419559) internal successors, (121726), 116408 states have internal predecessors, (121726), 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) [2022-07-20 23:44:38,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116409 states to 116409 states and 121726 transitions. [2022-07-20 23:44:38,344 INFO L78 Accepts]: Start accepts. Automaton has 116409 states and 121726 transitions. Word has length 725 [2022-07-20 23:44:38,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:44:38,345 INFO L495 AbstractCegarLoop]: Abstraction has 116409 states and 121726 transitions. [2022-07-20 23:44:38,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 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) [2022-07-20 23:44:38,345 INFO L276 IsEmpty]: Start isEmpty. Operand 116409 states and 121726 transitions. [2022-07-20 23:44:38,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2022-07-20 23:44:38,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:44:38,366 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:44:38,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 23:44:38,567 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,SelfDestructingSolverStorable16 [2022-07-20 23:44:38,568 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:44:38,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:44:38,568 INFO L85 PathProgramCache]: Analyzing trace with hash 799646942, now seen corresponding path program 1 times [2022-07-20 23:44:38,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:44:38,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658803725] [2022-07-20 23:44:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:44:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 597 proven. 45 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-07-20 23:44:39,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:44:39,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658803725] [2022-07-20 23:44:39,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658803725] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:44:39,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69932264] [2022-07-20 23:44:39,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:39,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:44:39,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:44:39,385 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) [2022-07-20 23:44:39,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 23:44:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:39,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 23:44:39,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:44:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 642 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-07-20 23:44:40,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:44:40,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69932264] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:44:40,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:44:40,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-20 23:44:40,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794135179] [2022-07-20 23:44:40,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:44:40,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:44:40,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:44:40,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:44:40,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-20 23:44:40,766 INFO L87 Difference]: Start difference. First operand 116409 states and 121726 transitions. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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) [2022-07-20 23:44:43,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:44:43,519 INFO L93 Difference]: Finished difference Result 232816 states and 243461 transitions. [2022-07-20 23:44:43,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:44:43,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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 775 [2022-07-20 23:44:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:44:43,671 INFO L225 Difference]: With dead ends: 232816 [2022-07-20 23:44:43,671 INFO L226 Difference]: Without dead ends: 117160 [2022-07-20 23:44:43,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 780 GetRequests, 775 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-20 23:44:43,748 INFO L413 NwaCegarLoop]: 1300 mSDtfsCounter, 489 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2184 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 2262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:44:43,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 1308 Invalid, 2262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2184 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-20 23:44:43,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117160 states. [2022-07-20 23:44:44,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117160 to 117160. [2022-07-20 23:44:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117160 states, 117159 states have (on average 1.0441707423245332) internal successors, (122334), 117159 states have internal predecessors, (122334), 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) [2022-07-20 23:44:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117160 states to 117160 states and 122334 transitions. [2022-07-20 23:44:45,496 INFO L78 Accepts]: Start accepts. Automaton has 117160 states and 122334 transitions. Word has length 775 [2022-07-20 23:44:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:44:45,497 INFO L495 AbstractCegarLoop]: Abstraction has 117160 states and 122334 transitions. [2022-07-20 23:44:45,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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) [2022-07-20 23:44:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 117160 states and 122334 transitions. [2022-07-20 23:44:45,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2022-07-20 23:44:45,531 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:44:45,531 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:44:45,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 23:44:45,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-20 23:44:45,756 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:44:45,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:44:45,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1311023516, now seen corresponding path program 1 times [2022-07-20 23:44:45,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:44:45,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330725458] [2022-07-20 23:44:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:45,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:44:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 538 proven. 592 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-20 23:44:46,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:44:46,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330725458] [2022-07-20 23:44:46,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330725458] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:44:46,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462491119] [2022-07-20 23:44:46,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:46,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:44:46,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:44:46,114 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) [2022-07-20 23:44:46,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 23:44:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:46,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 23:44:46,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:44:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 714 proven. 0 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2022-07-20 23:44:47,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:44:47,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462491119] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:44:47,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:44:47,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-20 23:44:47,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949120687] [2022-07-20 23:44:47,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:44:47,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:44:47,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:44:47,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:44:47,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 23:44:47,478 INFO L87 Difference]: Start difference. First operand 117160 states and 122334 transitions. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 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) [2022-07-20 23:44:50,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:44:50,119 INFO L93 Difference]: Finished difference Result 235069 states and 245433 transitions. [2022-07-20 23:44:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:44:50,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 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 802 [2022-07-20 23:44:50,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:44:50,263 INFO L225 Difference]: With dead ends: 235069 [2022-07-20 23:44:50,263 INFO L226 Difference]: Without dead ends: 116409 [2022-07-20 23:44:50,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 23:44:50,333 INFO L413 NwaCegarLoop]: 1349 mSDtfsCounter, 489 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-20 23:44:50,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 1357 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2094 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-20 23:44:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116409 states. [2022-07-20 23:44:51,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116409 to 115658. [2022-07-20 23:44:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115658 states, 115657 states have (on average 1.0437759928063153) internal successors, (120720), 115657 states have internal predecessors, (120720), 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) [2022-07-20 23:44:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115658 states to 115658 states and 120720 transitions. [2022-07-20 23:44:52,176 INFO L78 Accepts]: Start accepts. Automaton has 115658 states and 120720 transitions. Word has length 802 [2022-07-20 23:44:52,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:44:52,177 INFO L495 AbstractCegarLoop]: Abstraction has 115658 states and 120720 transitions. [2022-07-20 23:44:52,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 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) [2022-07-20 23:44:52,177 INFO L276 IsEmpty]: Start isEmpty. Operand 115658 states and 120720 transitions. [2022-07-20 23:44:52,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 842 [2022-07-20 23:44:52,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:44:52,214 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:44:52,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 23:44:52,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:44:52,428 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:44:52,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:44:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1375458458, now seen corresponding path program 1 times [2022-07-20 23:44:52,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:44:52,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907042130] [2022-07-20 23:44:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:52,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:44:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 1186 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-20 23:44:52,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:44:52,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907042130] [2022-07-20 23:44:52,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907042130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:44:52,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:44:52,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 23:44:52,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337664656] [2022-07-20 23:44:52,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:44:52,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:44:52,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:44:52,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:44:52,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:44:52,716 INFO L87 Difference]: Start difference. First operand 115658 states and 120720 transitions. Second operand has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 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) [2022-07-20 23:44:56,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:44:56,978 INFO L93 Difference]: Finished difference Result 235820 states and 246097 transitions. [2022-07-20 23:44:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:44:56,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 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 841 [2022-07-20 23:44:56,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:44:57,122 INFO L225 Difference]: With dead ends: 235820 [2022-07-20 23:44:57,123 INFO L226 Difference]: Without dead ends: 120915 [2022-07-20 23:44:57,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:44:57,186 INFO L413 NwaCegarLoop]: 1290 mSDtfsCounter, 1238 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5262 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 5454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 5262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:44:57,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 1312 Invalid, 5454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 5262 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-07-20 23:44:57,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120915 states. [2022-07-20 23:44:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120915 to 120915. [2022-07-20 23:44:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120915 states, 120914 states have (on average 1.0407893213358255) internal successors, (125846), 120914 states have internal predecessors, (125846), 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) [2022-07-20 23:44:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120915 states to 120915 states and 125846 transitions. [2022-07-20 23:44:59,033 INFO L78 Accepts]: Start accepts. Automaton has 120915 states and 125846 transitions. Word has length 841 [2022-07-20 23:44:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:44:59,034 INFO L495 AbstractCegarLoop]: Abstraction has 120915 states and 125846 transitions. [2022-07-20 23:44:59,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 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) [2022-07-20 23:44:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 120915 states and 125846 transitions. [2022-07-20 23:44:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2022-07-20 23:44:59,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:44:59,068 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:44:59,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-20 23:44:59,068 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:44:59,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:44:59,069 INFO L85 PathProgramCache]: Analyzing trace with hash -902176985, now seen corresponding path program 1 times [2022-07-20 23:44:59,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:44:59,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493003607] [2022-07-20 23:44:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:59,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:44:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 990 proven. 64 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-07-20 23:44:59,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:44:59,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493003607] [2022-07-20 23:44:59,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493003607] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:44:59,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441531314] [2022-07-20 23:44:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:44:59,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:44:59,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:44:59,481 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) [2022-07-20 23:44:59,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 23:44:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:44:59,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 23:44:59,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:45:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 1054 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-07-20 23:45:00,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:45:00,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441531314] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:45:00,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:45:00,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-07-20 23:45:00,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843177531] [2022-07-20 23:45:00,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:45:00,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:45:00,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:45:00,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:45:00,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-20 23:45:00,534 INFO L87 Difference]: Start difference. First operand 120915 states and 125846 transitions. Second operand has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 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) [2022-07-20 23:45:04,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:45:04,040 INFO L93 Difference]: Finished difference Result 241828 states and 251695 transitions. [2022-07-20 23:45:04,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:45:04,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 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 867 [2022-07-20 23:45:04,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:45:04,181 INFO L225 Difference]: With dead ends: 241828 [2022-07-20 23:45:04,181 INFO L226 Difference]: Without dead ends: 121666 [2022-07-20 23:45:04,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-20 23:45:04,251 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 1867 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3073 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1867 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 3372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 3073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 23:45:04,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1867 Valid, 395 Invalid, 3372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 3073 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-20 23:45:04,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121666 states. [2022-07-20 23:45:05,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121666 to 120164. [2022-07-20 23:45:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120164 states, 120163 states have (on average 1.0398209099306774) internal successors, (124948), 120163 states have internal predecessors, (124948), 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) [2022-07-20 23:45:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120164 states to 120164 states and 124948 transitions. [2022-07-20 23:45:06,040 INFO L78 Accepts]: Start accepts. Automaton has 120164 states and 124948 transitions. Word has length 867 [2022-07-20 23:45:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:45:06,040 INFO L495 AbstractCegarLoop]: Abstraction has 120164 states and 124948 transitions. [2022-07-20 23:45:06,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 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) [2022-07-20 23:45:06,041 INFO L276 IsEmpty]: Start isEmpty. Operand 120164 states and 124948 transitions. [2022-07-20 23:45:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2022-07-20 23:45:06,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:45:06,072 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:45:06,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 23:45:06,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:45:06,273 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:45:06,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:45:06,274 INFO L85 PathProgramCache]: Analyzing trace with hash -731115128, now seen corresponding path program 1 times [2022-07-20 23:45:06,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:45:06,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269579499] [2022-07-20 23:45:06,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:45:06,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:45:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:45:06,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 946 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:45:06,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:45:06,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269579499] [2022-07-20 23:45:06,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269579499] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:45:06,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494739465] [2022-07-20 23:45:06,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:45:06,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:45:06,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:45:06,651 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 23:45:06,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 23:45:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:45:06,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 23:45:06,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:45:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 704 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-07-20 23:45:07,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:45:07,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494739465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:45:07,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:45:07,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-20 23:45:07,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925726561] [2022-07-20 23:45:07,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:45:07,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:45:07,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:45:07,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:45:07,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 23:45:07,509 INFO L87 Difference]: Start difference. First operand 120164 states and 124948 transitions. Second operand has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 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) [2022-07-20 23:45:10,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:45:10,127 INFO L93 Difference]: Finished difference Result 239575 states and 249138 transitions. [2022-07-20 23:45:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:45:10,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 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 907 [2022-07-20 23:45:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:45:10,277 INFO L225 Difference]: With dead ends: 239575 [2022-07-20 23:45:10,277 INFO L226 Difference]: Without dead ends: 119413 [2022-07-20 23:45:10,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 913 GetRequests, 908 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 23:45:10,349 INFO L413 NwaCegarLoop]: 1303 mSDtfsCounter, 501 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 2156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:45:10,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 1310 Invalid, 2156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1977 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 23:45:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119413 states.