./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem11_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/Problem11_label02.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 30f62f9fddfecd916215dd8f1b75b140359bb989ba38a829add2eea4e4b271dc --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 12:19:16,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:19:16,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:19:16,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 12:19:16,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 12:19:16,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 12:19:16,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 12:19:16,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 12:19:16,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 12:19:16,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 12:19:16,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 12:19:16,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 12:19:16,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:19:16,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:19:16,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:19:16,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:19:16,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:19:16,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:19:16,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:19:16,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:19:16,641 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:19:16,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:19:16,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:19:16,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:19:16,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:19:16,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 12:19:16,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 12:19:16,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 12:19:16,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 12:19:16,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 12:19:16,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 12:19:16,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 12:19:16,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 12:19:16,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 12:19:16,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 12:19:16,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 12:19:16,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 12:19:16,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 12:19:16,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 12:19:16,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 12:19:16,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 12:19:16,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 12:19:16,664 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 12:19:16,707 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:19:16,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:19:16,708 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:19:16,708 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:19:16,709 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 12:19:16,709 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 12:19:16,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:19:16,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:19:16,710 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:19:16,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:19:16,711 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:19:16,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:19:16,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:19:16,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:19:16,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 12:19:16,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 12:19:16,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 12:19:16,712 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:19:16,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:19:16,712 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:19:16,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 12:19:16,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:19:16,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:19:16,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 12:19:16,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:19:16,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:19:16,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 12:19:16,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 12:19:16,714 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:19:16,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 12:19:16,714 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 12:19:16,714 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 12:19:16,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 12:19:16,715 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30f62f9fddfecd916215dd8f1b75b140359bb989ba38a829add2eea4e4b271dc [2022-07-22 12:19:17,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:19:17,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:19:17,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:19:17,184 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:19:17,185 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:19:17,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem11_label02.c [2022-07-22 12:19:17,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6359b9da/e3807d680e004881b3c642d638db5d47/FLAG2867e5039 [2022-07-22 12:19:17,828 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 12:19:17,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label02.c [2022-07-22 12:19:17,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6359b9da/e3807d680e004881b3c642d638db5d47/FLAG2867e5039 [2022-07-22 12:19:18,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6359b9da/e3807d680e004881b3c642d638db5d47 [2022-07-22 12:19:18,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:19:18,254 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 12:19:18,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:19:18,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:19:18,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:19:18,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:19:18" (1/1) ... [2022-07-22 12:19:18,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fabc904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:19:18, skipping insertion in model container [2022-07-22 12:19:18,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:19:18" (1/1) ... [2022-07-22 12:19:18,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:19:18,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:19:18,513 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/Problem11_label02.c[7865,7878] [2022-07-22 12:19:18,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:19:18,701 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:19:18,742 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/Problem11_label02.c[7865,7878] [2022-07-22 12:19:18,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:19:18,901 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:19:18,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:19:18 WrapperNode [2022-07-22 12:19:18,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:19:18,903 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:19:18,903 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:19:18,903 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:19:18,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:19:18" (1/1) ... [2022-07-22 12:19:18,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:19:18" (1/1) ... [2022-07-22 12:19:19,019 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2022-07-22 12:19:19,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:19:19,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:19:19,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:19:19,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:19:19,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:19:18" (1/1) ... [2022-07-22 12:19:19,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:19:18" (1/1) ... [2022-07-22 12:19:19,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:19:18" (1/1) ... [2022-07-22 12:19:19,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:19:18" (1/1) ... [2022-07-22 12:19:19,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:19:18" (1/1) ... [2022-07-22 12:19:19,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:19:18" (1/1) ... [2022-07-22 12:19:19,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:19:18" (1/1) ... [2022-07-22 12:19:19,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:19:19,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:19:19,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:19:19,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:19:19,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:19:18" (1/1) ... [2022-07-22 12:19:19,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:19:19,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:19:19,176 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) [2022-07-22 12:19:19,188 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 [2022-07-22 12:19:19,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:19:19,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:19:19,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:19:19,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:19:19,285 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:19:19,286 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:19:20,560 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:19:20,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:19:20,574 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 12:19:20,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:19:20 BoogieIcfgContainer [2022-07-22 12:19:20,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:19:20,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 12:19:20,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 12:19:20,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 12:19:20,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:19:18" (1/3) ... [2022-07-22 12:19:20,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360592bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:19:20, skipping insertion in model container [2022-07-22 12:19:20,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:19:18" (2/3) ... [2022-07-22 12:19:20,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360592bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:19:20, skipping insertion in model container [2022-07-22 12:19:20,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:19:20" (3/3) ... [2022-07-22 12:19:20,585 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label02.c [2022-07-22 12:19:20,597 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 12:19:20,597 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 12:19:20,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 12:19:20,666 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@789d248c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@21cb13c2 [2022-07-22 12:19:20,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 12:19:20,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:20,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 12:19:20,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:20,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:19:20,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:20,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:20,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1425694346, now seen corresponding path program 1 times [2022-07-22 12:19:20,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:20,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11111159] [2022-07-22 12:19:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:20,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:19:20,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:20,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11111159] [2022-07-22 12:19:20,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11111159] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:20,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:19:20,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:19:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670724618] [2022-07-22 12:19:20,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:20,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:19:20,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:20,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:19:20,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:19:20,968 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 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 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:22,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:22,091 INFO L93 Difference]: Finished difference Result 769 states and 1360 transitions. [2022-07-22 12:19:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:19:22,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-07-22 12:19:22,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:22,109 INFO L225 Difference]: With dead ends: 769 [2022-07-22 12:19:22,110 INFO L226 Difference]: Without dead ends: 422 [2022-07-22 12:19:22,119 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 [2022-07-22 12:19:22,130 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 186 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:22,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 163 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 12:19:22,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-07-22 12:19:22,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2022-07-22 12:19:22,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.5231143552311435) internal successors, (626), 411 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:22,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 626 transitions. [2022-07-22 12:19:22,264 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 626 transitions. Word has length 54 [2022-07-22 12:19:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:22,265 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 626 transitions. [2022-07-22 12:19:22,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:22,266 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 626 transitions. [2022-07-22 12:19:22,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-22 12:19:22,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:22,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:19:22,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 12:19:22,276 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:22,276 INFO L85 PathProgramCache]: Analyzing trace with hash 808427271, now seen corresponding path program 1 times [2022-07-22 12:19:22,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:22,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754468633] [2022-07-22 12:19:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:22,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:19:22,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:22,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754468633] [2022-07-22 12:19:22,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754468633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:22,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:19:22,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:19:22,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695174230] [2022-07-22 12:19:22,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:22,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:19:22,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:22,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:19:22,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:19:22,580 INFO L87 Difference]: Start difference. First operand 412 states and 626 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:23,307 INFO L93 Difference]: Finished difference Result 1194 states and 1821 transitions. [2022-07-22 12:19:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:19:23,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2022-07-22 12:19:23,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:23,314 INFO L225 Difference]: With dead ends: 1194 [2022-07-22 12:19:23,314 INFO L226 Difference]: Without dead ends: 784 [2022-07-22 12:19:23,316 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 [2022-07-22 12:19:23,317 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 175 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:23,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 154 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 12:19:23,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-07-22 12:19:23,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2022-07-22 12:19:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.3742017879948913) internal successors, (1076), 783 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1076 transitions. [2022-07-22 12:19:23,344 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1076 transitions. Word has length 120 [2022-07-22 12:19:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:23,344 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1076 transitions. [2022-07-22 12:19:23,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:23,345 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1076 transitions. [2022-07-22 12:19:23,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-22 12:19:23,349 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:23,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:19:23,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 12:19:23,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:23,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1746590275, now seen corresponding path program 1 times [2022-07-22 12:19:23,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:23,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039505253] [2022-07-22 12:19:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:23,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:19:23,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:23,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039505253] [2022-07-22 12:19:23,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039505253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:23,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:19:23,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:19:23,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450250235] [2022-07-22 12:19:23,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:23,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:19:23,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:23,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:19:23,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:19:23,490 INFO L87 Difference]: Start difference. First operand 784 states and 1076 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:24,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:24,162 INFO L93 Difference]: Finished difference Result 1936 states and 2599 transitions. [2022-07-22 12:19:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:19:24,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-07-22 12:19:24,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:24,167 INFO L225 Difference]: With dead ends: 1936 [2022-07-22 12:19:24,167 INFO L226 Difference]: Without dead ends: 1154 [2022-07-22 12:19:24,168 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 [2022-07-22 12:19:24,170 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 119 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:24,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 190 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 12:19:24,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-07-22 12:19:24,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1153. [2022-07-22 12:19:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 1.2699652777777777) internal successors, (1463), 1152 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:24,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1463 transitions. [2022-07-22 12:19:24,196 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1463 transitions. Word has length 124 [2022-07-22 12:19:24,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:24,197 INFO L495 AbstractCegarLoop]: Abstraction has 1153 states and 1463 transitions. [2022-07-22 12:19:24,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:24,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1463 transitions. [2022-07-22 12:19:24,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-22 12:19:24,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:24,201 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:19:24,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 12:19:24,202 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:24,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:24,202 INFO L85 PathProgramCache]: Analyzing trace with hash -948152282, now seen corresponding path program 1 times [2022-07-22 12:19:24,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:24,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920377104] [2022-07-22 12:19:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:24,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-22 12:19:24,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:24,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920377104] [2022-07-22 12:19:24,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920377104] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:24,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:19:24,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:19:24,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154173050] [2022-07-22 12:19:24,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:24,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:19:24,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:24,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:19:24,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:19:24,301 INFO L87 Difference]: Start difference. First operand 1153 states and 1463 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:24,956 INFO L93 Difference]: Finished difference Result 2494 states and 3189 transitions. [2022-07-22 12:19:24,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:19:24,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 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 166 [2022-07-22 12:19:24,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:24,961 INFO L225 Difference]: With dead ends: 2494 [2022-07-22 12:19:24,962 INFO L226 Difference]: Without dead ends: 1527 [2022-07-22 12:19:24,963 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 [2022-07-22 12:19:24,964 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 106 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:24,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 154 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 12:19:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2022-07-22 12:19:24,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1526. [2022-07-22 12:19:24,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 1.2557377049180327) internal successors, (1915), 1525 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 1915 transitions. [2022-07-22 12:19:24,989 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 1915 transitions. Word has length 166 [2022-07-22 12:19:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:24,990 INFO L495 AbstractCegarLoop]: Abstraction has 1526 states and 1915 transitions. [2022-07-22 12:19:24,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:24,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 1915 transitions. [2022-07-22 12:19:24,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-07-22 12:19:24,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:24,992 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:19:24,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 12:19:24,993 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:24,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:24,993 INFO L85 PathProgramCache]: Analyzing trace with hash -728761857, now seen corresponding path program 1 times [2022-07-22 12:19:24,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:24,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032335520] [2022-07-22 12:19:24,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:24,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:19:25,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:25,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032335520] [2022-07-22 12:19:25,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032335520] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:25,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:19:25,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:19:25,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609497325] [2022-07-22 12:19:25,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:25,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:19:25,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:25,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:19:25,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:19:25,091 INFO L87 Difference]: Start difference. First operand 1526 states and 1915 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:25,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:25,744 INFO L93 Difference]: Finished difference Result 2864 states and 3636 transitions. [2022-07-22 12:19:25,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:19:25,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2022-07-22 12:19:25,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:25,749 INFO L225 Difference]: With dead ends: 2864 [2022-07-22 12:19:25,750 INFO L226 Difference]: Without dead ends: 1524 [2022-07-22 12:19:25,752 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 [2022-07-22 12:19:25,757 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 181 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:25,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 306 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 12:19:25,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2022-07-22 12:19:25,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1524. [2022-07-22 12:19:25,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 1.2107682206172028) internal successors, (1844), 1523 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:25,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 1844 transitions. [2022-07-22 12:19:25,783 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 1844 transitions. Word has length 181 [2022-07-22 12:19:25,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:25,785 INFO L495 AbstractCegarLoop]: Abstraction has 1524 states and 1844 transitions. [2022-07-22 12:19:25,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:25,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 1844 transitions. [2022-07-22 12:19:25,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-07-22 12:19:25,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:25,794 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:19:25,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 12:19:25,795 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:25,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:25,796 INFO L85 PathProgramCache]: Analyzing trace with hash -845047207, now seen corresponding path program 1 times [2022-07-22 12:19:25,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:25,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543182414] [2022-07-22 12:19:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:25,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-22 12:19:25,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:25,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543182414] [2022-07-22 12:19:25,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543182414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:25,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:19:25,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:19:25,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215537750] [2022-07-22 12:19:25,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:25,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:19:25,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:25,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:19:25,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:19:25,913 INFO L87 Difference]: Start difference. First operand 1524 states and 1844 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:26,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:26,672 INFO L93 Difference]: Finished difference Result 3603 states and 4427 transitions. [2022-07-22 12:19:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:19:26,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2022-07-22 12:19:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:26,681 INFO L225 Difference]: With dead ends: 3603 [2022-07-22 12:19:26,681 INFO L226 Difference]: Without dead ends: 2265 [2022-07-22 12:19:26,685 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 [2022-07-22 12:19:26,688 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 143 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:26,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 386 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 12:19:26,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2022-07-22 12:19:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2076. [2022-07-22 12:19:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 1.192289156626506) internal successors, (2474), 2075 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:26,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 2474 transitions. [2022-07-22 12:19:26,728 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 2474 transitions. Word has length 236 [2022-07-22 12:19:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:26,728 INFO L495 AbstractCegarLoop]: Abstraction has 2076 states and 2474 transitions. [2022-07-22 12:19:26,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:26,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 2474 transitions. [2022-07-22 12:19:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-07-22 12:19:26,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:26,733 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:19:26,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 12:19:26,733 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:26,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:26,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1327280490, now seen corresponding path program 1 times [2022-07-22 12:19:26,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:26,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074599021] [2022-07-22 12:19:26,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:26,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 12:19:26,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:26,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074599021] [2022-07-22 12:19:26,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074599021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:26,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:19:26,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:19:26,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175501741] [2022-07-22 12:19:26,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:26,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:19:26,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:26,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:19:26,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:19:26,861 INFO L87 Difference]: Start difference. First operand 2076 states and 2474 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:27,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:27,571 INFO L93 Difference]: Finished difference Result 4890 states and 5877 transitions. [2022-07-22 12:19:27,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:19:27,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-07-22 12:19:27,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:27,581 INFO L225 Difference]: With dead ends: 4890 [2022-07-22 12:19:27,581 INFO L226 Difference]: Without dead ends: 2816 [2022-07-22 12:19:27,584 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 [2022-07-22 12:19:27,584 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 142 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:27,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 387 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 12:19:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2816 states. [2022-07-22 12:19:27,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 2811. [2022-07-22 12:19:27,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2811 states, 2810 states have (on average 1.1736654804270463) internal successors, (3298), 2810 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 3298 transitions. [2022-07-22 12:19:27,629 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 3298 transitions. Word has length 242 [2022-07-22 12:19:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:27,630 INFO L495 AbstractCegarLoop]: Abstraction has 2811 states and 3298 transitions. [2022-07-22 12:19:27,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:27,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 3298 transitions. [2022-07-22 12:19:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-07-22 12:19:27,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:27,635 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:19:27,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 12:19:27,635 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:27,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:27,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1752037152, now seen corresponding path program 1 times [2022-07-22 12:19:27,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:27,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849583151] [2022-07-22 12:19:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:27,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:19:27,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:27,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849583151] [2022-07-22 12:19:27,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849583151] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:27,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:19:27,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:19:27,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791377129] [2022-07-22 12:19:27,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:27,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:19:27,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:27,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:19:27,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:19:27,774 INFO L87 Difference]: Start difference. First operand 2811 states and 3298 transitions. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:28,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:28,891 INFO L93 Difference]: Finished difference Result 8956 states and 10588 transitions. [2022-07-22 12:19:28,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:19:28,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 281 [2022-07-22 12:19:28,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:28,913 INFO L225 Difference]: With dead ends: 8956 [2022-07-22 12:19:28,913 INFO L226 Difference]: Without dead ends: 6147 [2022-07-22 12:19:28,945 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 [2022-07-22 12:19:28,946 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 285 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:28,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 78 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 12:19:28,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6147 states. [2022-07-22 12:19:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6147 to 5961. [2022-07-22 12:19:29,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5961 states, 5960 states have (on average 1.1758389261744966) internal successors, (7008), 5960 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5961 states to 5961 states and 7008 transitions. [2022-07-22 12:19:29,049 INFO L78 Accepts]: Start accepts. Automaton has 5961 states and 7008 transitions. Word has length 281 [2022-07-22 12:19:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:29,049 INFO L495 AbstractCegarLoop]: Abstraction has 5961 states and 7008 transitions. [2022-07-22 12:19:29,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:29,050 INFO L276 IsEmpty]: Start isEmpty. Operand 5961 states and 7008 transitions. [2022-07-22 12:19:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-07-22 12:19:29,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:29,058 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, 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, 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] [2022-07-22 12:19:29,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 12:19:29,059 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:29,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:29,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1184279150, now seen corresponding path program 1 times [2022-07-22 12:19:29,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:29,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849754408] [2022-07-22 12:19:29,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:29,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-07-22 12:19:29,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:29,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849754408] [2022-07-22 12:19:29,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849754408] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:29,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:19:29,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:19:29,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726339536] [2022-07-22 12:19:29,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:29,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:19:29,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:29,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:19:29,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:19:29,211 INFO L87 Difference]: Start difference. First operand 5961 states and 7008 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:30,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:30,075 INFO L93 Difference]: Finished difference Result 12099 states and 14259 transitions. [2022-07-22 12:19:30,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:19:30,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 319 [2022-07-22 12:19:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:30,119 INFO L225 Difference]: With dead ends: 12099 [2022-07-22 12:19:30,135 INFO L226 Difference]: Without dead ends: 7248 [2022-07-22 12:19:30,143 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 [2022-07-22 12:19:30,158 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 168 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:30,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 146 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 12:19:30,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7248 states. [2022-07-22 12:19:30,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7248 to 4664. [2022-07-22 12:19:30,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4664 states, 4663 states have (on average 1.1799270855672315) internal successors, (5502), 4663 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:30,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4664 states to 4664 states and 5502 transitions. [2022-07-22 12:19:30,347 INFO L78 Accepts]: Start accepts. Automaton has 4664 states and 5502 transitions. Word has length 319 [2022-07-22 12:19:30,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:30,348 INFO L495 AbstractCegarLoop]: Abstraction has 4664 states and 5502 transitions. [2022-07-22 12:19:30,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:30,348 INFO L276 IsEmpty]: Start isEmpty. Operand 4664 states and 5502 transitions. [2022-07-22 12:19:30,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-07-22 12:19:30,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:30,355 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:19:30,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 12:19:30,355 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:30,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:30,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1130496183, now seen corresponding path program 1 times [2022-07-22 12:19:30,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:30,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240729338] [2022-07-22 12:19:30,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:30,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 171 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:19:30,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:30,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240729338] [2022-07-22 12:19:30,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240729338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:19:30,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216266330] [2022-07-22 12:19:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:30,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:19:30,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:19:30,767 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) [2022-07-22 12:19:30,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 12:19:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:31,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 12:19:31,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:19:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 171 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:19:32,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:19:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 171 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:19:35,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216266330] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 12:19:35,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 12:19:35,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 12:19:35,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274740371] [2022-07-22 12:19:35,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 12:19:35,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 12:19:35,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:35,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 12:19:35,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:19:35,307 INFO L87 Difference]: Start difference. First operand 4664 states and 5502 transitions. Second operand has 8 states, 8 states have (on average 72.5) internal successors, (580), 7 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:38,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:38,415 INFO L93 Difference]: Finished difference Result 12185 states and 14338 transitions. [2022-07-22 12:19:38,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 12:19:38,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 72.5) internal successors, (580), 7 states have internal predecessors, (580), 0 states have call successors, (0), 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 328 [2022-07-22 12:19:38,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:38,453 INFO L225 Difference]: With dead ends: 12185 [2022-07-22 12:19:38,453 INFO L226 Difference]: Without dead ends: 7891 [2022-07-22 12:19:38,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 651 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-07-22 12:19:38,461 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 1009 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:38,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1009 Valid, 185 Invalid, 2783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-22 12:19:38,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7891 states. [2022-07-22 12:19:38,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7891 to 4477. [2022-07-22 12:19:38,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 4476 states have (on average 1.1735924932975872) internal successors, (5253), 4476 states have internal predecessors, (5253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 5253 transitions. [2022-07-22 12:19:38,592 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 5253 transitions. Word has length 328 [2022-07-22 12:19:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:38,593 INFO L495 AbstractCegarLoop]: Abstraction has 4477 states and 5253 transitions. [2022-07-22 12:19:38,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.5) internal successors, (580), 7 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:38,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 5253 transitions. [2022-07-22 12:19:38,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2022-07-22 12:19:38,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:38,602 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, 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, 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] [2022-07-22 12:19:38,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 12:19:38,826 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,SelfDestructingSolverStorable9 [2022-07-22 12:19:38,826 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:38,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:38,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1345956964, now seen corresponding path program 1 times [2022-07-22 12:19:38,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:38,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040401156] [2022-07-22 12:19:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:38,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 188 proven. 148 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-22 12:19:39,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:39,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040401156] [2022-07-22 12:19:39,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040401156] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:19:39,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160959489] [2022-07-22 12:19:39,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:39,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:19:39,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:19:39,316 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) [2022-07-22 12:19:39,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 12:19:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:39,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:19:39,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:19:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 336 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-22 12:19:39,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:19:39,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160959489] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:39,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:19:39,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-22 12:19:39,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239791542] [2022-07-22 12:19:39,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:39,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:19:39,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:39,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:19:39,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:19:39,769 INFO L87 Difference]: Start difference. First operand 4477 states and 5253 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:40,775 INFO L93 Difference]: Finished difference Result 8778 states and 10330 transitions. [2022-07-22 12:19:40,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:19:40,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 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 348 [2022-07-22 12:19:40,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:40,789 INFO L225 Difference]: With dead ends: 8778 [2022-07-22 12:19:40,790 INFO L226 Difference]: Without dead ends: 4671 [2022-07-22 12:19:40,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:19:40,794 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 103 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:40,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 324 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 12:19:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4671 states. [2022-07-22 12:19:40,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4671 to 4477. [2022-07-22 12:19:40,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 4476 states have (on average 1.1427613941018766) internal successors, (5115), 4476 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:40,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 5115 transitions. [2022-07-22 12:19:40,911 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 5115 transitions. Word has length 348 [2022-07-22 12:19:40,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:40,912 INFO L495 AbstractCegarLoop]: Abstraction has 4477 states and 5115 transitions. [2022-07-22 12:19:40,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:40,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 5115 transitions. [2022-07-22 12:19:40,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-07-22 12:19:40,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:40,922 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:19:40,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 12:19:41,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 12:19:41,140 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:41,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:41,140 INFO L85 PathProgramCache]: Analyzing trace with hash -87231958, now seen corresponding path program 1 times [2022-07-22 12:19:41,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:41,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330445943] [2022-07-22 12:19:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:41,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:19:41,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:41,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330445943] [2022-07-22 12:19:41,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330445943] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:41,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:19:41,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:19:41,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425157981] [2022-07-22 12:19:41,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:41,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:19:41,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:41,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:19:41,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:19:41,444 INFO L87 Difference]: Start difference. First operand 4477 states and 5115 transitions. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:42,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:42,123 INFO L93 Difference]: Finished difference Result 11713 states and 13473 transitions. [2022-07-22 12:19:42,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:19:42,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 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 356 [2022-07-22 12:19:42,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:42,133 INFO L225 Difference]: With dead ends: 11713 [2022-07-22 12:19:42,133 INFO L226 Difference]: Without dead ends: 7606 [2022-07-22 12:19:42,138 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 [2022-07-22 12:19:42,139 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:42,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 70 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 12:19:42,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7606 states. [2022-07-22 12:19:42,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7606 to 7601. [2022-07-22 12:19:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7601 states, 7600 states have (on average 1.137763157894737) internal successors, (8647), 7600 states have internal predecessors, (8647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:42,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7601 states to 7601 states and 8647 transitions. [2022-07-22 12:19:42,237 INFO L78 Accepts]: Start accepts. Automaton has 7601 states and 8647 transitions. Word has length 356 [2022-07-22 12:19:42,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:42,238 INFO L495 AbstractCegarLoop]: Abstraction has 7601 states and 8647 transitions. [2022-07-22 12:19:42,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:42,238 INFO L276 IsEmpty]: Start isEmpty. Operand 7601 states and 8647 transitions. [2022-07-22 12:19:42,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-07-22 12:19:42,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:42,248 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:19:42,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 12:19:42,248 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:42,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:42,249 INFO L85 PathProgramCache]: Analyzing trace with hash -2000820814, now seen corresponding path program 1 times [2022-07-22 12:19:42,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:42,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295983008] [2022-07-22 12:19:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:42,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-07-22 12:19:42,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:42,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295983008] [2022-07-22 12:19:42,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295983008] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:19:42,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233783425] [2022-07-22 12:19:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:42,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:19:42,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:19:42,455 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) [2022-07-22 12:19:42,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 12:19:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:42,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:19:42,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:19:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-07-22 12:19:43,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:19:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-07-22 12:19:43,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233783425] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 12:19:43,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 12:19:43,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-22 12:19:43,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98823251] [2022-07-22 12:19:43,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:43,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:19:43,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:43,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:19:43,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:19:43,645 INFO L87 Difference]: Start difference. First operand 7601 states and 8647 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:44,473 INFO L93 Difference]: Finished difference Result 17036 states and 19446 transitions. [2022-07-22 12:19:44,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:19:44,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 359 [2022-07-22 12:19:44,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:44,489 INFO L225 Difference]: With dead ends: 17036 [2022-07-22 12:19:44,489 INFO L226 Difference]: Without dead ends: 9805 [2022-07-22 12:19:44,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 715 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:19:44,499 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 174 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:44,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 119 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 12:19:44,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9805 states. [2022-07-22 12:19:44,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9805 to 7964. [2022-07-22 12:19:44,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7964 states, 7963 states have (on average 1.1312319477583825) internal successors, (9008), 7963 states have internal predecessors, (9008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 9008 transitions. [2022-07-22 12:19:44,624 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 9008 transitions. Word has length 359 [2022-07-22 12:19:44,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:44,625 INFO L495 AbstractCegarLoop]: Abstraction has 7964 states and 9008 transitions. [2022-07-22 12:19:44,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:44,625 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 9008 transitions. [2022-07-22 12:19:44,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-07-22 12:19:44,636 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:44,636 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:19:44,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 12:19:44,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:19:44,851 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:44,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:44,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1108276798, now seen corresponding path program 1 times [2022-07-22 12:19:44,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:44,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693544631] [2022-07-22 12:19:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:44,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-07-22 12:19:45,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:45,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693544631] [2022-07-22 12:19:45,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693544631] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:45,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:19:45,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:19:45,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349522343] [2022-07-22 12:19:45,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:45,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:19:45,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:45,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:19:45,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:19:45,039 INFO L87 Difference]: Start difference. First operand 7964 states and 9008 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:45,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:45,745 INFO L93 Difference]: Finished difference Result 17029 states and 19297 transitions. [2022-07-22 12:19:45,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:19:45,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 446 [2022-07-22 12:19:45,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:45,760 INFO L225 Difference]: With dead ends: 17029 [2022-07-22 12:19:45,760 INFO L226 Difference]: Without dead ends: 9435 [2022-07-22 12:19:45,769 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 [2022-07-22 12:19:45,769 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 101 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:45,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 322 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 12:19:45,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9435 states. [2022-07-22 12:19:45,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9435 to 7587. [2022-07-22 12:19:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7587 states, 7586 states have (on average 1.119825995254416) internal successors, (8495), 7586 states have internal predecessors, (8495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7587 states to 7587 states and 8495 transitions. [2022-07-22 12:19:45,876 INFO L78 Accepts]: Start accepts. Automaton has 7587 states and 8495 transitions. Word has length 446 [2022-07-22 12:19:45,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:45,877 INFO L495 AbstractCegarLoop]: Abstraction has 7587 states and 8495 transitions. [2022-07-22 12:19:45,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:45,878 INFO L276 IsEmpty]: Start isEmpty. Operand 7587 states and 8495 transitions. [2022-07-22 12:19:45,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2022-07-22 12:19:45,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:45,890 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:19:45,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 12:19:45,890 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:45,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:45,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1480841082, now seen corresponding path program 1 times [2022-07-22 12:19:45,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:45,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953667413] [2022-07-22 12:19:45,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:45,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-07-22 12:19:46,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:46,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953667413] [2022-07-22 12:19:46,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953667413] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:46,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:19:46,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:19:46,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329981536] [2022-07-22 12:19:46,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:46,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:19:46,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:46,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:19:46,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:19:46,092 INFO L87 Difference]: Start difference. First operand 7587 states and 8495 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:46,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:46,671 INFO L93 Difference]: Finished difference Result 15359 states and 17218 transitions. [2022-07-22 12:19:46,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:19:46,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 480 [2022-07-22 12:19:46,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:46,684 INFO L225 Difference]: With dead ends: 15359 [2022-07-22 12:19:46,684 INFO L226 Difference]: Without dead ends: 7958 [2022-07-22 12:19:46,691 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 [2022-07-22 12:19:46,692 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 89 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:46,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 172 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 12:19:46,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2022-07-22 12:19:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7955. [2022-07-22 12:19:46,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7955 states, 7954 states have (on average 1.1079959768669851) internal successors, (8813), 7954 states have internal predecessors, (8813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7955 states to 7955 states and 8813 transitions. [2022-07-22 12:19:46,785 INFO L78 Accepts]: Start accepts. Automaton has 7955 states and 8813 transitions. Word has length 480 [2022-07-22 12:19:46,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:46,785 INFO L495 AbstractCegarLoop]: Abstraction has 7955 states and 8813 transitions. [2022-07-22 12:19:46,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:46,786 INFO L276 IsEmpty]: Start isEmpty. Operand 7955 states and 8813 transitions. [2022-07-22 12:19:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2022-07-22 12:19:46,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:46,830 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:19:46,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 12:19:46,831 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:46,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:46,832 INFO L85 PathProgramCache]: Analyzing trace with hash -380186503, now seen corresponding path program 1 times [2022-07-22 12:19:46,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:46,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420256426] [2022-07-22 12:19:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:46,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-07-22 12:19:47,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:47,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420256426] [2022-07-22 12:19:47,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420256426] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:47,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:19:47,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:19:47,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137867525] [2022-07-22 12:19:47,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:47,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:19:47,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:47,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:19:47,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:19:47,011 INFO L87 Difference]: Start difference. First operand 7955 states and 8813 transitions. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:48,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:48,089 INFO L93 Difference]: Finished difference Result 17379 states and 19317 transitions. [2022-07-22 12:19:48,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:19:48,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 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 481 [2022-07-22 12:19:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:48,107 INFO L225 Difference]: With dead ends: 17379 [2022-07-22 12:19:48,108 INFO L226 Difference]: Without dead ends: 9794 [2022-07-22 12:19:48,116 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 [2022-07-22 12:19:48,117 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 285 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:48,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 167 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 12:19:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9794 states. [2022-07-22 12:19:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9794 to 8874. [2022-07-22 12:19:48,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8874 states, 8873 states have (on average 1.1000788910176942) internal successors, (9761), 8873 states have internal predecessors, (9761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:48,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8874 states to 8874 states and 9761 transitions. [2022-07-22 12:19:48,296 INFO L78 Accepts]: Start accepts. Automaton has 8874 states and 9761 transitions. Word has length 481 [2022-07-22 12:19:48,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:48,297 INFO L495 AbstractCegarLoop]: Abstraction has 8874 states and 9761 transitions. [2022-07-22 12:19:48,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:48,297 INFO L276 IsEmpty]: Start isEmpty. Operand 8874 states and 9761 transitions. [2022-07-22 12:19:48,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2022-07-22 12:19:48,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:48,313 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, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2022-07-22 12:19:48,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 12:19:48,313 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:48,314 INFO L85 PathProgramCache]: Analyzing trace with hash -914071402, now seen corresponding path program 1 times [2022-07-22 12:19:48,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:48,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387515822] [2022-07-22 12:19:48,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:48,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 578 proven. 133 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-22 12:19:48,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:48,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387515822] [2022-07-22 12:19:48,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387515822] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:19:48,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884869406] [2022-07-22 12:19:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:48,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:19:48,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:19:48,598 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) [2022-07-22 12:19:48,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 12:19:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:48,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:19:48,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:19:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 659 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-07-22 12:19:48,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:19:48,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884869406] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:48,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:19:48,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-07-22 12:19:48,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362703223] [2022-07-22 12:19:48,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:48,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:19:48,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:48,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:19:48,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:19:48,895 INFO L87 Difference]: Start difference. First operand 8874 states and 9761 transitions. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:49,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:49,515 INFO L93 Difference]: Finished difference Result 18305 states and 20183 transitions. [2022-07-22 12:19:49,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:19:49,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 518 [2022-07-22 12:19:49,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:49,547 INFO L225 Difference]: With dead ends: 18305 [2022-07-22 12:19:49,547 INFO L226 Difference]: Without dead ends: 9801 [2022-07-22 12:19:49,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:19:49,573 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 93 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:49,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 329 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 12:19:49,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9801 states. [2022-07-22 12:19:49,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9801 to 9610. [2022-07-22 12:19:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9610 states, 9609 states have (on average 1.0999063378083047) internal successors, (10569), 9609 states have internal predecessors, (10569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9610 states to 9610 states and 10569 transitions. [2022-07-22 12:19:49,714 INFO L78 Accepts]: Start accepts. Automaton has 9610 states and 10569 transitions. Word has length 518 [2022-07-22 12:19:49,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:49,715 INFO L495 AbstractCegarLoop]: Abstraction has 9610 states and 10569 transitions. [2022-07-22 12:19:49,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:49,715 INFO L276 IsEmpty]: Start isEmpty. Operand 9610 states and 10569 transitions. [2022-07-22 12:19:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2022-07-22 12:19:49,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:49,730 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, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:19:49,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 12:19:49,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 12:19:49,956 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:49,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:49,957 INFO L85 PathProgramCache]: Analyzing trace with hash 978702432, now seen corresponding path program 1 times [2022-07-22 12:19:49,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:49,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184813722] [2022-07-22 12:19:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:49,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 659 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-07-22 12:19:50,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:50,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184813722] [2022-07-22 12:19:50,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184813722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:50,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:19:50,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:19:50,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492466706] [2022-07-22 12:19:50,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:50,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:19:50,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:50,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:19:50,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:19:50,290 INFO L87 Difference]: Start difference. First operand 9610 states and 10569 transitions. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:51,104 INFO L93 Difference]: Finished difference Result 20509 states and 22627 transitions. [2022-07-22 12:19:51,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:19:51,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 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 572 [2022-07-22 12:19:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:51,116 INFO L225 Difference]: With dead ends: 20509 [2022-07-22 12:19:51,116 INFO L226 Difference]: Without dead ends: 11269 [2022-07-22 12:19:51,122 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 [2022-07-22 12:19:51,125 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 120 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:51,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 73 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 12:19:51,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11269 states. [2022-07-22 12:19:51,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11269 to 9426. [2022-07-22 12:19:51,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9426 states, 9425 states have (on average 1.0980371352785145) internal successors, (10349), 9425 states have internal predecessors, (10349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:51,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9426 states to 9426 states and 10349 transitions. [2022-07-22 12:19:51,365 INFO L78 Accepts]: Start accepts. Automaton has 9426 states and 10349 transitions. Word has length 572 [2022-07-22 12:19:51,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:51,366 INFO L495 AbstractCegarLoop]: Abstraction has 9426 states and 10349 transitions. [2022-07-22 12:19:51,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:51,366 INFO L276 IsEmpty]: Start isEmpty. Operand 9426 states and 10349 transitions. [2022-07-22 12:19:51,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 683 [2022-07-22 12:19:51,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:51,441 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2022-07-22 12:19:51,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 12:19:51,442 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:51,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:51,443 INFO L85 PathProgramCache]: Analyzing trace with hash 47691538, now seen corresponding path program 1 times [2022-07-22 12:19:51,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:51,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264526762] [2022-07-22 12:19:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:51,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1718 backedges. 1189 proven. 0 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-07-22 12:19:51,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:51,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264526762] [2022-07-22 12:19:51,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264526762] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:51,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:19:51,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:19:51,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409575940] [2022-07-22 12:19:51,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:51,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:19:51,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:51,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:19:51,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:19:51,775 INFO L87 Difference]: Start difference. First operand 9426 states and 10349 transitions. Second operand has 4 states, 4 states have (on average 89.25) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:52,882 INFO L93 Difference]: Finished difference Result 20333 states and 22350 transitions. [2022-07-22 12:19:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:19:52,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 89.25) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 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 682 [2022-07-22 12:19:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:52,895 INFO L225 Difference]: With dead ends: 20333 [2022-07-22 12:19:52,896 INFO L226 Difference]: Without dead ends: 11092 [2022-07-22 12:19:52,905 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 [2022-07-22 12:19:52,906 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 205 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:52,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 73 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 12:19:52,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11092 states. [2022-07-22 12:19:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11092 to 8506. [2022-07-22 12:19:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8506 states, 8505 states have (on average 1.0979423868312757) internal successors, (9338), 8505 states have internal predecessors, (9338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8506 states to 8506 states and 9338 transitions. [2022-07-22 12:19:53,223 INFO L78 Accepts]: Start accepts. Automaton has 8506 states and 9338 transitions. Word has length 682 [2022-07-22 12:19:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:53,224 INFO L495 AbstractCegarLoop]: Abstraction has 8506 states and 9338 transitions. [2022-07-22 12:19:53,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.25) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 8506 states and 9338 transitions. [2022-07-22 12:19:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2022-07-22 12:19:53,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:53,264 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:19:53,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 12:19:53,265 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:53,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:53,266 INFO L85 PathProgramCache]: Analyzing trace with hash -534851769, now seen corresponding path program 1 times [2022-07-22 12:19:53,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:53,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699614778] [2022-07-22 12:19:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:53,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 1055 proven. 0 refuted. 0 times theorem prover too weak. 1187 trivial. 0 not checked. [2022-07-22 12:19:53,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:53,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699614778] [2022-07-22 12:19:53,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699614778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:19:53,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:19:53,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:19:53,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872792997] [2022-07-22 12:19:53,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:53,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:19:53,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:53,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:19:53,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:19:53,872 INFO L87 Difference]: Start difference. First operand 8506 states and 9338 transitions. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:55,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:19:55,241 INFO L93 Difference]: Finished difference Result 22725 states and 25044 transitions. [2022-07-22 12:19:55,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:19:55,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 774 [2022-07-22 12:19:55,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:19:55,257 INFO L225 Difference]: With dead ends: 22725 [2022-07-22 12:19:55,257 INFO L226 Difference]: Without dead ends: 14589 [2022-07-22 12:19:55,280 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 [2022-07-22 12:19:55,282 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 237 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:19:55,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 97 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 12:19:55,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14589 states. [2022-07-22 12:19:55,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14589 to 13665. [2022-07-22 12:19:55,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13665 states, 13664 states have (on average 1.088041569086651) internal successors, (14867), 13664 states have internal predecessors, (14867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:55,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13665 states to 13665 states and 14867 transitions. [2022-07-22 12:19:55,608 INFO L78 Accepts]: Start accepts. Automaton has 13665 states and 14867 transitions. Word has length 774 [2022-07-22 12:19:55,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:19:55,627 INFO L495 AbstractCegarLoop]: Abstraction has 13665 states and 14867 transitions. [2022-07-22 12:19:55,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:19:55,628 INFO L276 IsEmpty]: Start isEmpty. Operand 13665 states and 14867 transitions. [2022-07-22 12:19:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 789 [2022-07-22 12:19:55,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:19:55,662 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:19:55,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 12:19:55,662 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:19:55,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:19:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash 542249316, now seen corresponding path program 1 times [2022-07-22 12:19:55,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:19:55,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183586486] [2022-07-22 12:19:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:55,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:19:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 1107 proven. 336 refuted. 0 times theorem prover too weak. 919 trivial. 0 not checked. [2022-07-22 12:19:56,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:19:56,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183586486] [2022-07-22 12:19:56,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183586486] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:19:56,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233042877] [2022-07-22 12:19:56,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:19:56,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:19:56,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:19:56,412 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) [2022-07-22 12:19:56,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 12:19:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:19:56,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 12:19:56,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:19:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 1429 proven. 380 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2022-07-22 12:19:57,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:19:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 1809 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2022-07-22 12:19:58,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233042877] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 12:19:58,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 12:19:58,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 11 [2022-07-22 12:19:58,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430235034] [2022-07-22 12:19:58,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:19:58,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 12:19:58,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:19:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 12:19:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-07-22 12:19:58,723 INFO L87 Difference]: Start difference. First operand 13665 states and 14867 transitions. Second operand has 5 states, 5 states have (on average 87.8) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:00,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:20:00,114 INFO L93 Difference]: Finished difference Result 32855 states and 35805 transitions. [2022-07-22 12:20:00,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:20:00,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 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 788 [2022-07-22 12:20:00,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:20:00,135 INFO L225 Difference]: With dead ends: 32855 [2022-07-22 12:20:00,135 INFO L226 Difference]: Without dead ends: 19560 [2022-07-22 12:20:00,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1580 GetRequests, 1570 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-07-22 12:20:00,146 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 221 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:20:00,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 69 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 12:20:00,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19560 states. [2022-07-22 12:20:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19560 to 17165. [2022-07-22 12:20:00,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17165 states, 17164 states have (on average 1.0907131204847356) internal successors, (18721), 17164 states have internal predecessors, (18721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:00,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17165 states to 17165 states and 18721 transitions. [2022-07-22 12:20:00,365 INFO L78 Accepts]: Start accepts. Automaton has 17165 states and 18721 transitions. Word has length 788 [2022-07-22 12:20:00,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:20:00,365 INFO L495 AbstractCegarLoop]: Abstraction has 17165 states and 18721 transitions. [2022-07-22 12:20:00,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:00,366 INFO L276 IsEmpty]: Start isEmpty. Operand 17165 states and 18721 transitions. [2022-07-22 12:20:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 887 [2022-07-22 12:20:00,386 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:20:00,386 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:20:00,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 12:20:00,593 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 [2022-07-22 12:20:00,593 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:20:00,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:20:00,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1151524527, now seen corresponding path program 1 times [2022-07-22 12:20:00,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:20:00,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444113192] [2022-07-22 12:20:00,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:20:00,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:20:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:20:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2967 backedges. 1261 proven. 0 refuted. 0 times theorem prover too weak. 1706 trivial. 0 not checked. [2022-07-22 12:20:00,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:20:00,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444113192] [2022-07-22 12:20:00,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444113192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:20:00,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:20:00,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:20:00,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864261947] [2022-07-22 12:20:00,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:20:00,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:20:00,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:20:00,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:20:00,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:20:00,954 INFO L87 Difference]: Start difference. First operand 17165 states and 18721 transitions. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:01,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:20:01,608 INFO L93 Difference]: Finished difference Result 36912 states and 40337 transitions. [2022-07-22 12:20:01,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:20:01,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 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 886 [2022-07-22 12:20:01,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:20:01,630 INFO L225 Difference]: With dead ends: 36912 [2022-07-22 12:20:01,631 INFO L226 Difference]: Without dead ends: 20117 [2022-07-22 12:20:01,645 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 [2022-07-22 12:20:01,646 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 128 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:20:01,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 132 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 12:20:01,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20117 states. [2022-07-22 12:20:01,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20117 to 18824. [2022-07-22 12:20:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18824 states, 18823 states have (on average 1.0910588110290602) internal successors, (20537), 18823 states have internal predecessors, (20537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18824 states to 18824 states and 20537 transitions. [2022-07-22 12:20:01,922 INFO L78 Accepts]: Start accepts. Automaton has 18824 states and 20537 transitions. Word has length 886 [2022-07-22 12:20:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:20:01,923 INFO L495 AbstractCegarLoop]: Abstraction has 18824 states and 20537 transitions. [2022-07-22 12:20:01,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 18824 states and 20537 transitions. [2022-07-22 12:20:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 897 [2022-07-22 12:20:01,949 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:20:01,950 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:20:01,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 12:20:01,950 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:20:01,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:20:01,951 INFO L85 PathProgramCache]: Analyzing trace with hash 414037878, now seen corresponding path program 1 times [2022-07-22 12:20:01,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:20:01,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152698568] [2022-07-22 12:20:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:20:01,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:20:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:20:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2987 backedges. 2309 proven. 0 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2022-07-22 12:20:02,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:20:02,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152698568] [2022-07-22 12:20:02,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152698568] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:20:02,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:20:02,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:20:02,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534044829] [2022-07-22 12:20:02,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:20:02,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:20:02,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:20:02,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:20:02,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:20:02,406 INFO L87 Difference]: Start difference. First operand 18824 states and 20537 transitions. Second operand has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:03,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:20:03,733 INFO L93 Difference]: Finished difference Result 42075 states and 45858 transitions. [2022-07-22 12:20:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:20:03,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 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 896 [2022-07-22 12:20:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:20:03,760 INFO L225 Difference]: With dead ends: 42075 [2022-07-22 12:20:03,760 INFO L226 Difference]: Without dead ends: 23621 [2022-07-22 12:20:03,774 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 [2022-07-22 12:20:03,778 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 196 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:20:03,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 71 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 12:20:03,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23621 states. [2022-07-22 12:20:04,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23621 to 19569. [2022-07-22 12:20:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19569 states, 19568 states have (on average 1.0917313982011447) internal successors, (21363), 19568 states have internal predecessors, (21363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19569 states to 19569 states and 21363 transitions. [2022-07-22 12:20:04,143 INFO L78 Accepts]: Start accepts. Automaton has 19569 states and 21363 transitions. Word has length 896 [2022-07-22 12:20:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:20:04,144 INFO L495 AbstractCegarLoop]: Abstraction has 19569 states and 21363 transitions. [2022-07-22 12:20:04,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:04,146 INFO L276 IsEmpty]: Start isEmpty. Operand 19569 states and 21363 transitions. [2022-07-22 12:20:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2022-07-22 12:20:04,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:20:04,220 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:20:04,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 12:20:04,220 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:20:04,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:20:04,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1401252317, now seen corresponding path program 1 times [2022-07-22 12:20:04,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:20:04,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406001653] [2022-07-22 12:20:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:20:04,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:20:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:20:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3075 backedges. 2450 proven. 0 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-07-22 12:20:04,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:20:04,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406001653] [2022-07-22 12:20:04,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406001653] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:20:04,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:20:04,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:20:04,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732552790] [2022-07-22 12:20:04,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:20:04,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:20:04,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:20:04,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:20:04,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:20:04,642 INFO L87 Difference]: Start difference. First operand 19569 states and 21363 transitions. Second operand has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:06,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:20:06,089 INFO L93 Difference]: Finished difference Result 44118 states and 48129 transitions. [2022-07-22 12:20:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:20:06,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 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 [2022-07-22 12:20:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:20:06,146 INFO L225 Difference]: With dead ends: 44118 [2022-07-22 12:20:06,150 INFO L226 Difference]: Without dead ends: 24919 [2022-07-22 12:20:06,163 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 [2022-07-22 12:20:06,166 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 180 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:20:06,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 73 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 12:20:06,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24919 states. [2022-07-22 12:20:06,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24919 to 19753. [2022-07-22 12:20:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19753 states, 19752 states have (on average 1.0881429728635075) internal successors, (21493), 19752 states have internal predecessors, (21493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:06,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19753 states to 19753 states and 21493 transitions. [2022-07-22 12:20:06,435 INFO L78 Accepts]: Start accepts. Automaton has 19753 states and 21493 transitions. Word has length 907 [2022-07-22 12:20:06,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:20:06,435 INFO L495 AbstractCegarLoop]: Abstraction has 19753 states and 21493 transitions. [2022-07-22 12:20:06,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:06,436 INFO L276 IsEmpty]: Start isEmpty. Operand 19753 states and 21493 transitions. [2022-07-22 12:20:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1051 [2022-07-22 12:20:06,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:20:06,477 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:20:06,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 12:20:06,478 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:20:06,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:20:06,479 INFO L85 PathProgramCache]: Analyzing trace with hash 198152612, now seen corresponding path program 1 times [2022-07-22 12:20:06,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:20:06,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245153512] [2022-07-22 12:20:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:20:06,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:20:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:20:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3765 backedges. 2224 proven. 830 refuted. 0 times theorem prover too weak. 711 trivial. 0 not checked. [2022-07-22 12:20:07,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:20:07,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245153512] [2022-07-22 12:20:07,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245153512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:20:07,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398397971] [2022-07-22 12:20:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:20:07,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:20:07,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:20:07,255 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) [2022-07-22 12:20:07,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 12:20:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:20:07,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:20:07,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:20:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3765 backedges. 2291 proven. 0 refuted. 0 times theorem prover too weak. 1474 trivial. 0 not checked. [2022-07-22 12:20:07,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:20:07,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398397971] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:20:07,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:20:07,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-22 12:20:07,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842739872] [2022-07-22 12:20:07,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:20:07,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:20:07,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:20:07,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:20:07,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:20:07,938 INFO L87 Difference]: Start difference. First operand 19753 states and 21493 transitions. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:20:08,833 INFO L93 Difference]: Finished difference Result 39890 states and 43462 transitions. [2022-07-22 12:20:08,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:20:08,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1050 [2022-07-22 12:20:08,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:20:08,902 INFO L225 Difference]: With dead ends: 39890 [2022-07-22 12:20:08,903 INFO L226 Difference]: Without dead ends: 20507 [2022-07-22 12:20:08,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1057 GetRequests, 1051 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:20:08,922 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 106 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:20:08,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 328 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 12:20:08,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20507 states. [2022-07-22 12:20:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20507 to 19763. [2022-07-22 12:20:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19763 states, 19762 states have (on average 1.0865803056370813) internal successors, (21473), 19762 states have internal predecessors, (21473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:09,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19763 states to 19763 states and 21473 transitions. [2022-07-22 12:20:09,217 INFO L78 Accepts]: Start accepts. Automaton has 19763 states and 21473 transitions. Word has length 1050 [2022-07-22 12:20:09,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:20:09,217 INFO L495 AbstractCegarLoop]: Abstraction has 19763 states and 21473 transitions. [2022-07-22 12:20:09,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:09,218 INFO L276 IsEmpty]: Start isEmpty. Operand 19763 states and 21473 transitions. [2022-07-22 12:20:09,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1055 [2022-07-22 12:20:09,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:20:09,256 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:20:09,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 12:20:09,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:20:09,480 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:20:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:20:09,480 INFO L85 PathProgramCache]: Analyzing trace with hash 256274069, now seen corresponding path program 1 times [2022-07-22 12:20:09,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:20:09,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383829374] [2022-07-22 12:20:09,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:20:09,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:20:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:20:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3893 backedges. 3097 proven. 0 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2022-07-22 12:20:10,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:20:10,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383829374] [2022-07-22 12:20:10,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383829374] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:20:10,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:20:10,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:20:10,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490146226] [2022-07-22 12:20:10,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:20:10,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:20:10,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:20:10,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:20:10,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:20:10,305 INFO L87 Difference]: Start difference. First operand 19763 states and 21473 transitions. Second operand has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:11,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:20:11,769 INFO L93 Difference]: Finished difference Result 44880 states and 48738 transitions. [2022-07-22 12:20:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:20:11,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 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 1054 [2022-07-22 12:20:11,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:20:11,821 INFO L225 Difference]: With dead ends: 44880 [2022-07-22 12:20:11,821 INFO L226 Difference]: Without dead ends: 25487 [2022-07-22 12:20:11,837 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 [2022-07-22 12:20:11,837 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 182 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:20:11,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 73 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 12:20:11,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25487 states. [2022-07-22 12:20:12,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25487 to 19395. [2022-07-22 12:20:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19395 states, 19394 states have (on average 1.087604413736207) internal successors, (21093), 19394 states have internal predecessors, (21093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19395 states to 19395 states and 21093 transitions. [2022-07-22 12:20:12,128 INFO L78 Accepts]: Start accepts. Automaton has 19395 states and 21093 transitions. Word has length 1054 [2022-07-22 12:20:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:20:12,129 INFO L495 AbstractCegarLoop]: Abstraction has 19395 states and 21093 transitions. [2022-07-22 12:20:12,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 19395 states and 21093 transitions. [2022-07-22 12:20:12,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1161 [2022-07-22 12:20:12,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:20:12,152 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:20:12,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-22 12:20:12,153 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:20:12,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:20:12,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1982006465, now seen corresponding path program 1 times [2022-07-22 12:20:12,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:20:12,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641584100] [2022-07-22 12:20:12,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:20:12,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:20:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:20:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 2244 proven. 0 refuted. 0 times theorem prover too weak. 1934 trivial. 0 not checked. [2022-07-22 12:20:12,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:20:12,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641584100] [2022-07-22 12:20:12,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641584100] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:20:12,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:20:12,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:20:12,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296285448] [2022-07-22 12:20:12,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:20:12,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:20:12,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:20:12,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:20:12,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:20:12,578 INFO L87 Difference]: Start difference. First operand 19395 states and 21093 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:13,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:20:13,006 INFO L93 Difference]: Finished difference Result 37672 states and 40972 transitions. [2022-07-22 12:20:13,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:20:13,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 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 1160 [2022-07-22 12:20:13,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:20:13,023 INFO L225 Difference]: With dead ends: 37672 [2022-07-22 12:20:13,023 INFO L226 Difference]: Without dead ends: 18646 [2022-07-22 12:20:13,029 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 [2022-07-22 12:20:13,030 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 151 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:20:13,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 31 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 12:20:13,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18646 states. [2022-07-22 12:20:13,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18646 to 18640. [2022-07-22 12:20:13,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18640 states, 18639 states have (on average 1.0858951660496807) internal successors, (20240), 18639 states have internal predecessors, (20240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18640 states to 18640 states and 20240 transitions. [2022-07-22 12:20:13,208 INFO L78 Accepts]: Start accepts. Automaton has 18640 states and 20240 transitions. Word has length 1160 [2022-07-22 12:20:13,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:20:13,208 INFO L495 AbstractCegarLoop]: Abstraction has 18640 states and 20240 transitions. [2022-07-22 12:20:13,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:13,209 INFO L276 IsEmpty]: Start isEmpty. Operand 18640 states and 20240 transitions. [2022-07-22 12:20:13,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1185 [2022-07-22 12:20:13,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:20:13,227 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 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, 4, 4, 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] [2022-07-22 12:20:13,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-22 12:20:13,227 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:20:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:20:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1536632297, now seen corresponding path program 1 times [2022-07-22 12:20:13,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:20:13,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891210309] [2022-07-22 12:20:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:20:13,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:20:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:20:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4195 backedges. 1524 proven. 0 refuted. 0 times theorem prover too weak. 2671 trivial. 0 not checked. [2022-07-22 12:20:13,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:20:13,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891210309] [2022-07-22 12:20:13,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891210309] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:20:13,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:20:13,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:20:13,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765784823] [2022-07-22 12:20:13,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:20:13,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:20:13,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:20:13,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:20:13,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:20:13,568 INFO L87 Difference]: Start difference. First operand 18640 states and 20240 transitions. Second operand has 4 states, 4 states have (on average 102.5) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:20:14,583 INFO L93 Difference]: Finished difference Result 37831 states and 41085 transitions. [2022-07-22 12:20:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:20:14,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 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 1184 [2022-07-22 12:20:14,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:20:14,605 INFO L225 Difference]: With dead ends: 37831 [2022-07-22 12:20:14,606 INFO L226 Difference]: Without dead ends: 19193 [2022-07-22 12:20:14,618 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 [2022-07-22 12:20:14,619 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 200 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:20:14,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 75 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 12:20:14,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19193 states. [2022-07-22 12:20:14,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19193 to 19192. [2022-07-22 12:20:14,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19192 states, 19191 states have (on average 1.0842582460528372) internal successors, (20808), 19191 states have internal predecessors, (20808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19192 states to 19192 states and 20808 transitions. [2022-07-22 12:20:15,039 INFO L78 Accepts]: Start accepts. Automaton has 19192 states and 20808 transitions. Word has length 1184 [2022-07-22 12:20:15,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:20:15,040 INFO L495 AbstractCegarLoop]: Abstraction has 19192 states and 20808 transitions. [2022-07-22 12:20:15,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:15,040 INFO L276 IsEmpty]: Start isEmpty. Operand 19192 states and 20808 transitions. [2022-07-22 12:20:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1223 [2022-07-22 12:20:15,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:20:15,059 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:20:15,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-22 12:20:15,059 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:20:15,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:20:15,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1855217040, now seen corresponding path program 1 times [2022-07-22 12:20:15,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:20:15,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350872669] [2022-07-22 12:20:15,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:20:15,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:20:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:20:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4769 backedges. 2030 proven. 0 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2022-07-22 12:20:15,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:20:15,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350872669] [2022-07-22 12:20:15,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350872669] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:20:15,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:20:15,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:20:15,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961554489] [2022-07-22 12:20:15,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:20:15,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:20:15,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:20:15,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:20:15,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:20:15,370 INFO L87 Difference]: Start difference. First operand 19192 states and 20808 transitions. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:16,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:20:16,169 INFO L93 Difference]: Finished difference Result 41337 states and 44764 transitions. [2022-07-22 12:20:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:20:16,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 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 1222 [2022-07-22 12:20:16,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:20:16,194 INFO L225 Difference]: With dead ends: 41337 [2022-07-22 12:20:16,194 INFO L226 Difference]: Without dead ends: 21411 [2022-07-22 12:20:16,208 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 [2022-07-22 12:20:16,213 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 135 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:20:16,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 324 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 12:20:16,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21411 states. [2022-07-22 12:20:16,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21411 to 19749. [2022-07-22 12:20:16,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19749 states, 19748 states have (on average 1.08122341502937) internal successors, (21352), 19748 states have internal predecessors, (21352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19749 states to 19749 states and 21352 transitions. [2022-07-22 12:20:16,502 INFO L78 Accepts]: Start accepts. Automaton has 19749 states and 21352 transitions. Word has length 1222 [2022-07-22 12:20:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:20:16,503 INFO L495 AbstractCegarLoop]: Abstraction has 19749 states and 21352 transitions. [2022-07-22 12:20:16,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 19749 states and 21352 transitions. [2022-07-22 12:20:16,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1223 [2022-07-22 12:20:16,527 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:20:16,527 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:20:16,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-22 12:20:16,528 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:20:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:20:16,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1480409017, now seen corresponding path program 1 times [2022-07-22 12:20:16,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:20:16,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742472458] [2022-07-22 12:20:16,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:20:16,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:20:16,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:20:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4256 backedges. 2293 proven. 73 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2022-07-22 12:20:17,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:20:17,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742472458] [2022-07-22 12:20:17,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742472458] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:20:17,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429435162] [2022-07-22 12:20:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:20:17,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:20:17,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:20:17,128 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:20:17,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 12:20:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:20:17,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1535 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:20:17,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:20:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4256 backedges. 2616 proven. 0 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-07-22 12:20:17,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:20:17,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429435162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:20:17,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:20:17,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-07-22 12:20:17,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553038852] [2022-07-22 12:20:17,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:20:17,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:20:17,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:20:17,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:20:17,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:20:17,960 INFO L87 Difference]: Start difference. First operand 19749 states and 21352 transitions. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:18,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:20:18,685 INFO L93 Difference]: Finished difference Result 33400 states and 36118 transitions. [2022-07-22 12:20:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:20:18,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 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 1222 [2022-07-22 12:20:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:20:18,687 INFO L225 Difference]: With dead ends: 33400 [2022-07-22 12:20:18,687 INFO L226 Difference]: Without dead ends: 0 [2022-07-22 12:20:18,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1225 GetRequests, 1223 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:20:18,702 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 64 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:20:18,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 279 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 12:20:18,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-22 12:20:18,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-22 12:20:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-22 12:20:18,704 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1222 [2022-07-22 12:20:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:20:18,705 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 12:20:18,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:20:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-22 12:20:18,705 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-22 12:20:18,712 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 12:20:18,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 12:20:18,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:20:18,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.