./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label37.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem12_label37.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 216d354bd2b39cc08159a7e1d05b12b6bb34b7a88f8458e31e862be3f2691415 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 12:13:20,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 12:13:20,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 12:13:20,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 12:13:20,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 12:13:20,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 12:13:20,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 12:13:20,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 12:13:20,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 12:13:20,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 12:13:20,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 12:13:20,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 12:13:20,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 12:13:20,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 12:13:20,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 12:13:20,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 12:13:20,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 12:13:20,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 12:13:20,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 12:13:20,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 12:13:20,714 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 12:13:20,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 12:13:20,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 12:13:20,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 12:13:20,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 12:13:20,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 12:13:20,725 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 12:13:20,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 12:13:20,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 12:13:20,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 12:13:20,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 12:13:20,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 12:13:20,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 12:13:20,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 12:13:20,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 12:13:20,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 12:13:20,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 12:13:20,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 12:13:20,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 12:13:20,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 12:13:20,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 12:13:20,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 12:13:20,738 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 12:13:20,771 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 12:13:20,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 12:13:20,772 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 12:13:20,772 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 12:13:20,773 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 12:13:20,773 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 12:13:20,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 12:13:20,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 12:13:20,774 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 12:13:20,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 12:13:20,775 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 12:13:20,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 12:13:20,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 12:13:20,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 12:13:20,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 12:13:20,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 12:13:20,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 12:13:20,776 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 12:13:20,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 12:13:20,777 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 12:13:20,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 12:13:20,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 12:13:20,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 12:13:20,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 12:13:20,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:13:20,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 12:13:20,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 12:13:20,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 12:13:20,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 12:13:20,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 12:13:20,780 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 12:13:20,780 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 12:13:20,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 12:13:20,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 216d354bd2b39cc08159a7e1d05b12b6bb34b7a88f8458e31e862be3f2691415 [2022-07-19 12:13:21,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 12:13:21,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 12:13:21,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 12:13:21,070 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 12:13:21,070 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 12:13:21,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label37.c [2022-07-19 12:13:21,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/649adad6a/44d16b17773944aaa3f5c7f7f5b17c14/FLAGcd009cf43 [2022-07-19 12:13:21,814 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 12:13:21,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label37.c [2022-07-19 12:13:21,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/649adad6a/44d16b17773944aaa3f5c7f7f5b17c14/FLAGcd009cf43 [2022-07-19 12:13:22,097 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/649adad6a/44d16b17773944aaa3f5c7f7f5b17c14 [2022-07-19 12:13:22,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 12:13:22,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 12:13:22,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 12:13:22,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 12:13:22,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 12:13:22,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:13:22" (1/1) ... [2022-07-19 12:13:22,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d546da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:13:22, skipping insertion in model container [2022-07-19 12:13:22,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:13:22" (1/1) ... [2022-07-19 12:13:22,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 12:13:22,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 12:13:22,485 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label37.c[2005,2018] [2022-07-19 12:13:23,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:13:23,219 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 12:13:23,246 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label37.c[2005,2018] [2022-07-19 12:13:23,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:13:23,701 INFO L208 MainTranslator]: Completed translation [2022-07-19 12:13:23,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:13:23 WrapperNode [2022-07-19 12:13:23,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 12:13:23,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 12:13:23,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 12:13:23,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 12:13:23,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:13:23" (1/1) ... [2022-07-19 12:13:23,755 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:13:23" (1/1) ... [2022-07-19 12:13:24,126 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-07-19 12:13:24,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 12:13:24,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 12:13:24,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 12:13:24,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 12:13:24,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:13:23" (1/1) ... [2022-07-19 12:13:24,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:13:23" (1/1) ... [2022-07-19 12:13:24,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:13:23" (1/1) ... [2022-07-19 12:13:24,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:13:23" (1/1) ... [2022-07-19 12:13:24,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:13:23" (1/1) ... [2022-07-19 12:13:24,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:13:23" (1/1) ... [2022-07-19 12:13:24,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:13:23" (1/1) ... [2022-07-19 12:13:24,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 12:13:24,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 12:13:24,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 12:13:24,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 12:13:24,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:13:23" (1/1) ... [2022-07-19 12:13:24,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:13:24,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:13:24,617 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) [2022-07-19 12:13:24,635 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 [2022-07-19 12:13:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 12:13:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 12:13:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 12:13:24,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 12:13:24,734 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 12:13:24,735 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 12:13:28,145 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 12:13:28,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 12:13:28,159 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 12:13:28,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:13:28 BoogieIcfgContainer [2022-07-19 12:13:28,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 12:13:28,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 12:13:28,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 12:13:28,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 12:13:28,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 12:13:22" (1/3) ... [2022-07-19 12:13:28,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db114d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:13:28, skipping insertion in model container [2022-07-19 12:13:28,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:13:23" (2/3) ... [2022-07-19 12:13:28,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db114d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:13:28, skipping insertion in model container [2022-07-19 12:13:28,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:13:28" (3/3) ... [2022-07-19 12:13:28,170 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label37.c [2022-07-19 12:13:28,182 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 12:13:28,183 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 12:13:28,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 12:13:28,244 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@2f49059, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@787500eb [2022-07-19 12:13:28,244 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 12:13:28,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:28,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 12:13:28,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:28,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:28,259 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:28,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:28,264 INFO L85 PathProgramCache]: Analyzing trace with hash -461255479, now seen corresponding path program 1 times [2022-07-19 12:13:28,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:28,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204363948] [2022-07-19 12:13:28,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:28,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:13:28,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:28,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204363948] [2022-07-19 12:13:28,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204363948] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:28,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:13:28,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:13:28,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497585600] [2022-07-19 12:13:28,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:28,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:28,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:28,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:28,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:13:28,499 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:32,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:32,185 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2022-07-19 12:13:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:32,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-07-19 12:13:32,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:32,207 INFO L225 Difference]: With dead ends: 2388 [2022-07-19 12:13:32,208 INFO L226 Difference]: Without dead ends: 1506 [2022-07-19 12:13:32,213 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 [2022-07-19 12:13:32,216 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 846 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 1058 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 3395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1058 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:32,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 102 Invalid, 3395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1058 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-19 12:13:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-07-19 12:13:32,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-07-19 12:13:32,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.869767441860465) internal successors, (2814), 1505 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2814 transitions. [2022-07-19 12:13:32,314 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2814 transitions. Word has length 13 [2022-07-19 12:13:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:32,315 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2814 transitions. [2022-07-19 12:13:32,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:32,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2814 transitions. [2022-07-19 12:13:32,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-19 12:13:32,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:32,318 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 12:13:32,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 12:13:32,319 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:32,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1317915872, now seen corresponding path program 1 times [2022-07-19 12:13:32,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:32,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528093525] [2022-07-19 12:13:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:32,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:13:32,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:32,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528093525] [2022-07-19 12:13:32,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528093525] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:32,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:13:32,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:13:32,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65152725] [2022-07-19 12:13:32,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:32,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:32,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:32,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:32,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:13:32,452 INFO L87 Difference]: Start difference. First operand 1506 states and 2814 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:35,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:35,693 INFO L93 Difference]: Finished difference Result 4514 states and 8438 transitions. [2022-07-19 12:13:35,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:35,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2022-07-19 12:13:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:35,710 INFO L225 Difference]: With dead ends: 4514 [2022-07-19 12:13:35,710 INFO L226 Difference]: Without dead ends: 3010 [2022-07-19 12:13:35,714 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 [2022-07-19 12:13:35,715 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 918 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:35,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 354 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-19 12:13:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2022-07-19 12:13:35,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 3008. [2022-07-19 12:13:35,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.6531426671100764) internal successors, (4971), 3007 states have internal predecessors, (4971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:35,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4971 transitions. [2022-07-19 12:13:35,790 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4971 transitions. Word has length 86 [2022-07-19 12:13:35,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:35,790 INFO L495 AbstractCegarLoop]: Abstraction has 3008 states and 4971 transitions. [2022-07-19 12:13:35,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4971 transitions. [2022-07-19 12:13:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-19 12:13:35,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:35,800 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 12:13:35,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 12:13:35,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:35,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:35,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2032696291, now seen corresponding path program 1 times [2022-07-19 12:13:35,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:35,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132980671] [2022-07-19 12:13:35,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:35,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:13:35,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:35,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132980671] [2022-07-19 12:13:35,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132980671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:35,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:13:35,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:13:35,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446814311] [2022-07-19 12:13:35,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:35,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:13:35,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:35,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:13:35,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:13:35,960 INFO L87 Difference]: Start difference. First operand 3008 states and 4971 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:40,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:40,872 INFO L93 Difference]: Finished difference Result 8267 states and 13429 transitions. [2022-07-19 12:13:40,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:13:40,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2022-07-19 12:13:40,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:40,899 INFO L225 Difference]: With dead ends: 8267 [2022-07-19 12:13:40,899 INFO L226 Difference]: Without dead ends: 5261 [2022-07-19 12:13:40,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:13:40,907 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 2154 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4998 mSolverCounterSat, 851 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2154 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 5849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 4998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:40,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2154 Valid, 353 Invalid, 5849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [851 Valid, 4998 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-07-19 12:13:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2022-07-19 12:13:41,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2022-07-19 12:13:41,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.5102661596958176) internal successors, (7944), 5260 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7944 transitions. [2022-07-19 12:13:41,031 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7944 transitions. Word has length 99 [2022-07-19 12:13:41,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:41,031 INFO L495 AbstractCegarLoop]: Abstraction has 5261 states and 7944 transitions. [2022-07-19 12:13:41,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:41,032 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7944 transitions. [2022-07-19 12:13:41,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-07-19 12:13:41,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:41,034 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:41,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 12:13:41,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:41,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:41,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1005399562, now seen corresponding path program 1 times [2022-07-19 12:13:41,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:41,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179419512] [2022-07-19 12:13:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:41,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:13:41,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:41,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179419512] [2022-07-19 12:13:41,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179419512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:13:41,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684166933] [2022-07-19 12:13:41,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:41,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:13:41,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:13:41,210 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) [2022-07-19 12:13:41,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 12:13:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:41,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:13:41,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:13:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 12:13:41,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:13:41,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684166933] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:41,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:13:41,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-19 12:13:41,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970144763] [2022-07-19 12:13:41,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:41,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:41,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:41,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:41,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:13:41,606 INFO L87 Difference]: Start difference. First operand 5261 states and 7944 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:44,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:44,435 INFO L93 Difference]: Finished difference Result 14275 states and 22313 transitions. [2022-07-19 12:13:44,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:44,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 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 154 [2022-07-19 12:13:44,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:44,474 INFO L225 Difference]: With dead ends: 14275 [2022-07-19 12:13:44,475 INFO L226 Difference]: Without dead ends: 9767 [2022-07-19 12:13:44,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:13:44,487 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 621 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 3041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:44,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 666 Invalid, 3041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-19 12:13:44,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2022-07-19 12:13:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2022-07-19 12:13:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.3878763055498669) internal successors, (13554), 9766 states have internal predecessors, (13554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 13554 transitions. [2022-07-19 12:13:44,702 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 13554 transitions. Word has length 154 [2022-07-19 12:13:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:44,703 INFO L495 AbstractCegarLoop]: Abstraction has 9767 states and 13554 transitions. [2022-07-19 12:13:44,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:44,705 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 13554 transitions. [2022-07-19 12:13:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-07-19 12:13:44,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:44,708 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 12:13:44,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 12:13:44,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:13:44,936 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:44,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:44,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1859295125, now seen corresponding path program 1 times [2022-07-19 12:13:44,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:44,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017358834] [2022-07-19 12:13:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:44,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:13:45,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:45,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017358834] [2022-07-19 12:13:45,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017358834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:45,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:13:45,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:13:45,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870482649] [2022-07-19 12:13:45,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:45,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:13:45,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:45,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:13:45,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:13:45,097 INFO L87 Difference]: Start difference. First operand 9767 states and 13554 transitions. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:48,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:48,163 INFO L93 Difference]: Finished difference Result 23326 states and 32178 transitions. [2022-07-19 12:13:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:13:48,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 170 [2022-07-19 12:13:48,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:48,236 INFO L225 Difference]: With dead ends: 23326 [2022-07-19 12:13:48,236 INFO L226 Difference]: Without dead ends: 14275 [2022-07-19 12:13:48,253 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 [2022-07-19 12:13:48,255 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 706 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3109 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 3109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:48,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 710 Invalid, 3501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 3109 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:13:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14275 states. [2022-07-19 12:13:48,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14275 to 14273. [2022-07-19 12:13:48,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 1.2780269058295963) internal successors, (18240), 14272 states have internal predecessors, (18240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:48,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 18240 transitions. [2022-07-19 12:13:48,556 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 18240 transitions. Word has length 170 [2022-07-19 12:13:48,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:48,557 INFO L495 AbstractCegarLoop]: Abstraction has 14273 states and 18240 transitions. [2022-07-19 12:13:48,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:48,558 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 18240 transitions. [2022-07-19 12:13:48,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-07-19 12:13:48,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:48,561 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:48,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 12:13:48,561 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:48,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:48,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1739309358, now seen corresponding path program 1 times [2022-07-19 12:13:48,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:48,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936627850] [2022-07-19 12:13:48,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:48,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:13:48,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:48,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936627850] [2022-07-19 12:13:48,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936627850] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:13:48,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055804090] [2022-07-19 12:13:48,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:48,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:13:48,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:13:48,930 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) [2022-07-19 12:13:48,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 12:13:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:49,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:13:49,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:13:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-07-19 12:13:49,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:13:49,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055804090] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:49,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:13:49,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-19 12:13:49,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772831261] [2022-07-19 12:13:49,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:49,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:49,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:49,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:49,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:13:49,092 INFO L87 Difference]: Start difference. First operand 14273 states and 18240 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:51,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:51,979 INFO L93 Difference]: Finished difference Result 36805 states and 48363 transitions. [2022-07-19 12:13:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:51,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 244 [2022-07-19 12:13:51,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:52,039 INFO L225 Difference]: With dead ends: 36805 [2022-07-19 12:13:52,039 INFO L226 Difference]: Without dead ends: 23285 [2022-07-19 12:13:52,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:13:52,063 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 818 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:52,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 868 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 2265 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-19 12:13:52,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23285 states. [2022-07-19 12:13:52,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23285 to 23285. [2022-07-19 12:13:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23285 states, 23284 states have (on average 1.3053169558495104) internal successors, (30393), 23284 states have internal predecessors, (30393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23285 states to 23285 states and 30393 transitions. [2022-07-19 12:13:52,564 INFO L78 Accepts]: Start accepts. Automaton has 23285 states and 30393 transitions. Word has length 244 [2022-07-19 12:13:52,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:52,565 INFO L495 AbstractCegarLoop]: Abstraction has 23285 states and 30393 transitions. [2022-07-19 12:13:52,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:52,565 INFO L276 IsEmpty]: Start isEmpty. Operand 23285 states and 30393 transitions. [2022-07-19 12:13:52,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-19 12:13:52,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:52,577 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:52,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 12:13:52,791 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,SelfDestructingSolverStorable5 [2022-07-19 12:13:52,792 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:52,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:52,793 INFO L85 PathProgramCache]: Analyzing trace with hash -518830816, now seen corresponding path program 1 times [2022-07-19 12:13:52,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:52,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038136019] [2022-07-19 12:13:52,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:52,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-19 12:13:53,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:53,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038136019] [2022-07-19 12:13:53,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038136019] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:53,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:13:53,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:13:53,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563583058] [2022-07-19 12:13:53,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:53,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:53,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:53,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:53,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:13:53,018 INFO L87 Difference]: Start difference. First operand 23285 states and 30393 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:55,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:55,709 INFO L93 Difference]: Finished difference Result 57082 states and 76329 transitions. [2022-07-19 12:13:55,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:55,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2022-07-19 12:13:55,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:55,803 INFO L225 Difference]: With dead ends: 57082 [2022-07-19 12:13:55,804 INFO L226 Difference]: Without dead ends: 34550 [2022-07-19 12:13:55,831 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 [2022-07-19 12:13:55,832 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 853 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 2888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:55,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [853 Valid, 249 Invalid, 2888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 2235 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-19 12:13:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34550 states. [2022-07-19 12:13:56,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34550 to 34550. [2022-07-19 12:13:56,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34550 states, 34549 states have (on average 1.3112969984659468) internal successors, (45304), 34549 states have internal predecessors, (45304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34550 states to 34550 states and 45304 transitions. [2022-07-19 12:13:56,427 INFO L78 Accepts]: Start accepts. Automaton has 34550 states and 45304 transitions. Word has length 253 [2022-07-19 12:13:56,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:13:56,428 INFO L495 AbstractCegarLoop]: Abstraction has 34550 states and 45304 transitions. [2022-07-19 12:13:56,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:56,429 INFO L276 IsEmpty]: Start isEmpty. Operand 34550 states and 45304 transitions. [2022-07-19 12:13:56,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-07-19 12:13:56,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:13:56,435 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:13:56,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 12:13:56,436 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:13:56,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:13:56,437 INFO L85 PathProgramCache]: Analyzing trace with hash -879499859, now seen corresponding path program 1 times [2022-07-19 12:13:56,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:13:56,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151704771] [2022-07-19 12:13:56,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:13:56,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:13:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:13:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:13:56,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:13:56,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151704771] [2022-07-19 12:13:56,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151704771] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:13:56,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:13:56,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:13:56,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058705848] [2022-07-19 12:13:56,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:13:56,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:13:56,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:13:56,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:13:56,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:13:56,583 INFO L87 Difference]: Start difference. First operand 34550 states and 45304 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:13:59,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:13:59,619 INFO L93 Difference]: Finished difference Result 68347 states and 89850 transitions. [2022-07-19 12:13:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:13:59,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 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 271 [2022-07-19 12:13:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:13:59,684 INFO L225 Difference]: With dead ends: 68347 [2022-07-19 12:13:59,684 INFO L226 Difference]: Without dead ends: 34550 [2022-07-19 12:13:59,709 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 [2022-07-19 12:13:59,710 INFO L413 NwaCegarLoop]: 1267 mSDtfsCounter, 651 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2656 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 2656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:13:59,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1274 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 2656 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-19 12:13:59,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34550 states. [2022-07-19 12:14:00,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34550 to 34550. [2022-07-19 12:14:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34550 states, 34549 states have (on average 1.2889519233552347) internal successors, (44532), 34549 states have internal predecessors, (44532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34550 states to 34550 states and 44532 transitions. [2022-07-19 12:14:00,234 INFO L78 Accepts]: Start accepts. Automaton has 34550 states and 44532 transitions. Word has length 271 [2022-07-19 12:14:00,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:14:00,235 INFO L495 AbstractCegarLoop]: Abstraction has 34550 states and 44532 transitions. [2022-07-19 12:14:00,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:00,235 INFO L276 IsEmpty]: Start isEmpty. Operand 34550 states and 44532 transitions. [2022-07-19 12:14:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-07-19 12:14:00,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:14:00,239 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:14:00,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 12:14:00,240 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:14:00,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:14:00,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1640314461, now seen corresponding path program 1 times [2022-07-19 12:14:00,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:14:00,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144353953] [2022-07-19 12:14:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:14:00,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:14:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:14:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-19 12:14:00,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:14:00,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144353953] [2022-07-19 12:14:00,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144353953] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:14:00,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:14:00,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:14:00,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550598590] [2022-07-19 12:14:00,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:14:00,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:14:00,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:14:00,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:14:00,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:14:00,361 INFO L87 Difference]: Start difference. First operand 34550 states and 44532 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:03,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:14:03,460 INFO L93 Difference]: Finished difference Result 95383 states and 123558 transitions. [2022-07-19 12:14:03,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:14:03,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 275 [2022-07-19 12:14:03,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:14:03,551 INFO L225 Difference]: With dead ends: 95383 [2022-07-19 12:14:03,551 INFO L226 Difference]: Without dead ends: 61586 [2022-07-19 12:14:03,580 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 [2022-07-19 12:14:03,581 INFO L413 NwaCegarLoop]: 1397 mSDtfsCounter, 741 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:14:03,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 1405 Invalid, 2887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-19 12:14:03,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61586 states. [2022-07-19 12:14:04,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61586 to 60084. [2022-07-19 12:14:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60084 states, 60083 states have (on average 1.1968110780087546) internal successors, (71908), 60083 states have internal predecessors, (71908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60084 states to 60084 states and 71908 transitions. [2022-07-19 12:14:04,334 INFO L78 Accepts]: Start accepts. Automaton has 60084 states and 71908 transitions. Word has length 275 [2022-07-19 12:14:04,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:14:04,335 INFO L495 AbstractCegarLoop]: Abstraction has 60084 states and 71908 transitions. [2022-07-19 12:14:04,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 60084 states and 71908 transitions. [2022-07-19 12:14:04,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2022-07-19 12:14:04,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:14:04,357 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:14:04,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 12:14:04,358 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:14:04,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:14:04,359 INFO L85 PathProgramCache]: Analyzing trace with hash -437185341, now seen corresponding path program 1 times [2022-07-19 12:14:04,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:14:04,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679210993] [2022-07-19 12:14:04,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:14:04,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:14:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:14:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:14:04,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:14:04,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679210993] [2022-07-19 12:14:04,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679210993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:14:04,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:14:04,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:14:04,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750219063] [2022-07-19 12:14:04,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:14:04,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:14:04,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:14:04,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:14:04,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:14:04,808 INFO L87 Difference]: Start difference. First operand 60084 states and 71908 transitions. Second operand has 4 states, 4 states have (on average 126.5) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:14:09,301 INFO L93 Difference]: Finished difference Result 144949 states and 177319 transitions. [2022-07-19 12:14:09,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:14:09,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 126.5) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 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 506 [2022-07-19 12:14:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:14:09,424 INFO L225 Difference]: With dead ends: 144949 [2022-07-19 12:14:09,424 INFO L226 Difference]: Without dead ends: 85618 [2022-07-19 12:14:09,456 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 [2022-07-19 12:14:09,457 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 1079 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 4302 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 5248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 4302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:14:09,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 440 Invalid, 5248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 4302 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-07-19 12:14:09,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85618 states. [2022-07-19 12:14:10,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85618 to 78859. [2022-07-19 12:14:10,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78859 states, 78858 states have (on average 1.1790306627101879) internal successors, (92976), 78858 states have internal predecessors, (92976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78859 states to 78859 states and 92976 transitions. [2022-07-19 12:14:10,567 INFO L78 Accepts]: Start accepts. Automaton has 78859 states and 92976 transitions. Word has length 506 [2022-07-19 12:14:10,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:14:10,568 INFO L495 AbstractCegarLoop]: Abstraction has 78859 states and 92976 transitions. [2022-07-19 12:14:10,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.5) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:10,568 INFO L276 IsEmpty]: Start isEmpty. Operand 78859 states and 92976 transitions. [2022-07-19 12:14:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2022-07-19 12:14:10,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:14:10,596 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:14:10,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 12:14:10,596 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:14:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:14:10,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1368749593, now seen corresponding path program 1 times [2022-07-19 12:14:10,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:14:10,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737704296] [2022-07-19 12:14:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:14:10,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:14:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:14:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 197 proven. 108 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 12:14:11,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:14:11,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737704296] [2022-07-19 12:14:11,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737704296] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:14:11,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553058011] [2022-07-19 12:14:11,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:14:11,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:14:11,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:14:11,196 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) [2022-07-19 12:14:11,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 12:14:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:14:11,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 12:14:11,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:14:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-19 12:14:12,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:14:12,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553058011] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:14:12,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:14:12,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-19 12:14:12,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91690123] [2022-07-19 12:14:12,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:14:12,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:14:12,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:14:12,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:14:12,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:14:12,632 INFO L87 Difference]: Start difference. First operand 78859 states and 92976 transitions. Second operand has 4 states, 4 states have (on average 127.0) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:16,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:14:16,232 INFO L93 Difference]: Finished difference Result 168230 states and 198059 transitions. [2022-07-19 12:14:16,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:14:16,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 127.0) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 585 [2022-07-19 12:14:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:14:16,346 INFO L225 Difference]: With dead ends: 168230 [2022-07-19 12:14:16,346 INFO L226 Difference]: Without dead ends: 90124 [2022-07-19 12:14:16,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 583 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:14:16,381 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 1638 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3150 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1638 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 3561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 3150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:14:16,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1638 Valid, 578 Invalid, 3561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 3150 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:14:16,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90124 states. [2022-07-19 12:14:17,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90124 to 87120. [2022-07-19 12:14:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87120 states, 87119 states have (on average 1.1699973599329652) internal successors, (101929), 87119 states have internal predecessors, (101929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:17,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87120 states to 87120 states and 101929 transitions. [2022-07-19 12:14:17,563 INFO L78 Accepts]: Start accepts. Automaton has 87120 states and 101929 transitions. Word has length 585 [2022-07-19 12:14:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:14:17,564 INFO L495 AbstractCegarLoop]: Abstraction has 87120 states and 101929 transitions. [2022-07-19 12:14:17,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.0) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:17,565 INFO L276 IsEmpty]: Start isEmpty. Operand 87120 states and 101929 transitions. [2022-07-19 12:14:17,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2022-07-19 12:14:17,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:14:17,586 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:14:17,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 12:14:17,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:14:17,787 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:14:17,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:14:17,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2004908532, now seen corresponding path program 1 times [2022-07-19 12:14:17,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:14:17,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579604751] [2022-07-19 12:14:17,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:14:17,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:14:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:14:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 116 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:14:18,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:14:18,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579604751] [2022-07-19 12:14:18,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579604751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:14:18,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411420244] [2022-07-19 12:14:18,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:14:18,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:14:18,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:14:18,328 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) [2022-07-19 12:14:18,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 12:14:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:14:18,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 12:14:18,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:14:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 12:14:19,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:14:19,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411420244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:14:19,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:14:19,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-19 12:14:19,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668507582] [2022-07-19 12:14:19,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:14:19,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:14:19,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:14:19,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:14:19,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 12:14:19,502 INFO L87 Difference]: Start difference. First operand 87120 states and 101929 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:22,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:14:22,775 INFO L93 Difference]: Finished difference Result 205029 states and 240876 transitions. [2022-07-19 12:14:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:14:22,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 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 595 [2022-07-19 12:14:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:14:22,986 INFO L225 Difference]: With dead ends: 205029 [2022-07-19 12:14:22,986 INFO L226 Difference]: Without dead ends: 118662 [2022-07-19 12:14:23,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 594 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 12:14:23,047 INFO L413 NwaCegarLoop]: 1298 mSDtfsCounter, 412 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 2777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:14:23,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 1306 Invalid, 2777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:14:23,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118662 states. [2022-07-19 12:14:24,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118662 to 115658. [2022-07-19 12:14:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115658 states, 115657 states have (on average 1.1493640678904) internal successors, (132932), 115657 states have internal predecessors, (132932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115658 states to 115658 states and 132932 transitions. [2022-07-19 12:14:24,857 INFO L78 Accepts]: Start accepts. Automaton has 115658 states and 132932 transitions. Word has length 595 [2022-07-19 12:14:24,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:14:24,858 INFO L495 AbstractCegarLoop]: Abstraction has 115658 states and 132932 transitions. [2022-07-19 12:14:24,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:24,858 INFO L276 IsEmpty]: Start isEmpty. Operand 115658 states and 132932 transitions. [2022-07-19 12:14:24,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2022-07-19 12:14:24,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:14:24,882 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:14:24,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 12:14:25,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:14:25,084 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:14:25,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:14:25,085 INFO L85 PathProgramCache]: Analyzing trace with hash 494068697, now seen corresponding path program 1 times [2022-07-19 12:14:25,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:14:25,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929276099] [2022-07-19 12:14:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:14:25,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:14:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:14:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-19 12:14:25,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:14:25,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929276099] [2022-07-19 12:14:25,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929276099] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:14:25,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:14:25,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:14:25,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731352971] [2022-07-19 12:14:25,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:14:25,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:14:25,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:14:25,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:14:25,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:14:25,355 INFO L87 Difference]: Start difference. First operand 115658 states and 132932 transitions. Second operand has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:14:28,934 INFO L93 Difference]: Finished difference Result 232816 states and 267391 transitions. [2022-07-19 12:14:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:14:28,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 605 [2022-07-19 12:14:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:14:29,150 INFO L225 Difference]: With dead ends: 232816 [2022-07-19 12:14:29,150 INFO L226 Difference]: Without dead ends: 115658 [2022-07-19 12:14:29,223 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 [2022-07-19 12:14:29,224 INFO L413 NwaCegarLoop]: 1291 mSDtfsCounter, 405 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2470 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 2470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:14:29,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1298 Invalid, 2733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 2470 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-19 12:14:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115658 states. [2022-07-19 12:14:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115658 to 114156. [2022-07-19 12:14:30,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114156 states, 114155 states have (on average 1.1360956594104508) internal successors, (129691), 114155 states have internal predecessors, (129691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114156 states to 114156 states and 129691 transitions. [2022-07-19 12:14:31,063 INFO L78 Accepts]: Start accepts. Automaton has 114156 states and 129691 transitions. Word has length 605 [2022-07-19 12:14:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:14:31,069 INFO L495 AbstractCegarLoop]: Abstraction has 114156 states and 129691 transitions. [2022-07-19 12:14:31,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:31,069 INFO L276 IsEmpty]: Start isEmpty. Operand 114156 states and 129691 transitions. [2022-07-19 12:14:31,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2022-07-19 12:14:31,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:14:31,098 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:14:31,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 12:14:31,098 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:14:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:14:31,100 INFO L85 PathProgramCache]: Analyzing trace with hash 429750882, now seen corresponding path program 1 times [2022-07-19 12:14:31,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:14:31,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759323528] [2022-07-19 12:14:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:14:31,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:14:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:14:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 541 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-19 12:14:31,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:14:31,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759323528] [2022-07-19 12:14:31,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759323528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:14:31,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:14:31,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:14:31,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374408169] [2022-07-19 12:14:31,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:14:31,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:14:31,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:14:31,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:14:31,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:14:31,284 INFO L87 Difference]: Start difference. First operand 114156 states and 129691 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:34,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:14:34,425 INFO L93 Difference]: Finished difference Result 248587 states and 285354 transitions. [2022-07-19 12:14:34,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:14:34,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 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 605 [2022-07-19 12:14:34,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:14:34,639 INFO L225 Difference]: With dead ends: 248587 [2022-07-19 12:14:34,640 INFO L226 Difference]: Without dead ends: 135184 [2022-07-19 12:14:34,714 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 [2022-07-19 12:14:34,714 INFO L413 NwaCegarLoop]: 1210 mSDtfsCounter, 675 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2256 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 2256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:14:34,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 1218 Invalid, 2759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 2256 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-19 12:14:34,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135184 states. [2022-07-19 12:14:36,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135184 to 132180. [2022-07-19 12:14:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132180 states, 132179 states have (on average 1.1204881259504158) internal successors, (148105), 132179 states have internal predecessors, (148105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:36,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132180 states to 132180 states and 148105 transitions. [2022-07-19 12:14:36,783 INFO L78 Accepts]: Start accepts. Automaton has 132180 states and 148105 transitions. Word has length 605 [2022-07-19 12:14:36,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:14:36,784 INFO L495 AbstractCegarLoop]: Abstraction has 132180 states and 148105 transitions. [2022-07-19 12:14:36,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:36,784 INFO L276 IsEmpty]: Start isEmpty. Operand 132180 states and 148105 transitions. [2022-07-19 12:14:36,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2022-07-19 12:14:36,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:14:36,806 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:14:36,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 12:14:36,807 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:14:36,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:14:36,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1748289736, now seen corresponding path program 1 times [2022-07-19 12:14:36,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:14:36,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457757993] [2022-07-19 12:14:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:14:36,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:14:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:14:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 398 proven. 54 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 12:14:37,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:14:37,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457757993] [2022-07-19 12:14:37,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457757993] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:14:37,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567574684] [2022-07-19 12:14:37,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:14:37,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:14:37,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:14:37,030 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) [2022-07-19 12:14:37,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 12:14:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:14:37,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 12:14:37,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:14:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 452 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 12:14:38,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:14:38,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567574684] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:14:38,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:14:38,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-19 12:14:38,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3053686] [2022-07-19 12:14:38,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:14:38,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:14:38,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:14:38,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:14:38,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:14:38,142 INFO L87 Difference]: Start difference. First operand 132180 states and 148105 transitions. Second operand has 4 states, 4 states have (on average 161.0) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:42,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:14:42,447 INFO L93 Difference]: Finished difference Result 270366 states and 302375 transitions. [2022-07-19 12:14:42,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:14:42,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 161.0) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 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 654 [2022-07-19 12:14:42,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:14:42,651 INFO L225 Difference]: With dead ends: 270366 [2022-07-19 12:14:42,651 INFO L226 Difference]: Without dead ends: 138939 [2022-07-19 12:14:42,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 652 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:14:42,721 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 1238 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4658 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 4928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 4658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:14:42,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 547 Invalid, 4928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 4658 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-19 12:14:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138939 states. [2022-07-19 12:14:44,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138939 to 136686. [2022-07-19 12:14:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136686 states, 136685 states have (on average 1.1129970369828437) internal successors, (152130), 136685 states have internal predecessors, (152130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:44,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136686 states to 136686 states and 152130 transitions. [2022-07-19 12:14:44,885 INFO L78 Accepts]: Start accepts. Automaton has 136686 states and 152130 transitions. Word has length 654 [2022-07-19 12:14:44,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:14:44,885 INFO L495 AbstractCegarLoop]: Abstraction has 136686 states and 152130 transitions. [2022-07-19 12:14:44,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.0) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:44,886 INFO L276 IsEmpty]: Start isEmpty. Operand 136686 states and 152130 transitions. [2022-07-19 12:14:44,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2022-07-19 12:14:44,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:14:44,913 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:14:44,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 12:14:45,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 12:14:45,114 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:14:45,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:14:45,114 INFO L85 PathProgramCache]: Analyzing trace with hash -144935900, now seen corresponding path program 1 times [2022-07-19 12:14:45,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:14:45,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110818904] [2022-07-19 12:14:45,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:14:45,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:14:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:14:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-07-19 12:14:45,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:14:45,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110818904] [2022-07-19 12:14:45,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110818904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:14:45,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:14:45,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:14:45,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858976409] [2022-07-19 12:14:45,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:14:45,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:14:45,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:14:45,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:14:45,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:14:45,412 INFO L87 Difference]: Start difference. First operand 136686 states and 152130 transitions. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:48,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:14:48,743 INFO L93 Difference]: Finished difference Result 295900 states and 329195 transitions. [2022-07-19 12:14:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:14:48,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 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 658 [2022-07-19 12:14:48,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:14:48,977 INFO L225 Difference]: With dead ends: 295900 [2022-07-19 12:14:48,977 INFO L226 Difference]: Without dead ends: 158465 [2022-07-19 12:14:49,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:14:49,077 INFO L413 NwaCegarLoop]: 894 mSDtfsCounter, 851 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 2725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:14:49,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 902 Invalid, 2725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 2130 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-19 12:14:49,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158465 states. [2022-07-19 12:14:51,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158465 to 149453. [2022-07-19 12:14:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149453 states, 149452 states have (on average 1.0965059015603673) internal successors, (163875), 149452 states have internal predecessors, (163875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149453 states to 149453 states and 163875 transitions. [2022-07-19 12:14:51,585 INFO L78 Accepts]: Start accepts. Automaton has 149453 states and 163875 transitions. Word has length 658 [2022-07-19 12:14:51,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:14:51,586 INFO L495 AbstractCegarLoop]: Abstraction has 149453 states and 163875 transitions. [2022-07-19 12:14:51,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:14:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 149453 states and 163875 transitions. [2022-07-19 12:14:51,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2022-07-19 12:14:51,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:14:51,634 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:14:51,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 12:14:51,634 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:14:51,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:14:51,635 INFO L85 PathProgramCache]: Analyzing trace with hash 30575756, now seen corresponding path program 1 times [2022-07-19 12:14:51,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:14:51,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638517787] [2022-07-19 12:14:51,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:14:51,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:14:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:14:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 600 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-07-19 12:14:52,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:14:52,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638517787] [2022-07-19 12:14:52,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638517787] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:14:52,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:14:52,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 12:14:52,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220257473] [2022-07-19 12:14:52,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:14:52,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 12:14:52,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:14:52,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 12:14:52,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:14:52,467 INFO L87 Difference]: Start difference. First operand 149453 states and 163875 transitions. Second operand has 7 states, 7 states have (on average 90.42857142857143) internal successors, (633), 6 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:15:01,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:15:01,810 INFO L93 Difference]: Finished difference Result 349968 states and 382748 transitions. [2022-07-19 12:15:01,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 12:15:01,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 90.42857142857143) internal successors, (633), 6 states have internal predecessors, (633), 0 states have call successors, (0), 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 717 [2022-07-19 12:15:01,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:15:02,093 INFO L225 Difference]: With dead ends: 349968 [2022-07-19 12:15:02,093 INFO L226 Difference]: Without dead ends: 201268 [2022-07-19 12:15:02,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-07-19 12:15:02,140 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 4333 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 11803 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4333 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 13009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 11803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:15:02,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4333 Valid, 937 Invalid, 13009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1206 Valid, 11803 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-07-19 12:15:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201268 states. [2022-07-19 12:15:04,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201268 to 154710. [2022-07-19 12:15:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154710 states, 154709 states have (on average 1.0932589571388867) internal successors, (169137), 154709 states have internal predecessors, (169137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:15:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154710 states to 154710 states and 169137 transitions. [2022-07-19 12:15:04,926 INFO L78 Accepts]: Start accepts. Automaton has 154710 states and 169137 transitions. Word has length 717 [2022-07-19 12:15:04,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:15:04,927 INFO L495 AbstractCegarLoop]: Abstraction has 154710 states and 169137 transitions. [2022-07-19 12:15:04,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.42857142857143) internal successors, (633), 6 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:15:04,927 INFO L276 IsEmpty]: Start isEmpty. Operand 154710 states and 169137 transitions. [2022-07-19 12:15:04,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2022-07-19 12:15:04,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:15:04,962 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:15:04,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 12:15:04,962 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:15:04,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:15:04,963 INFO L85 PathProgramCache]: Analyzing trace with hash -763910631, now seen corresponding path program 1 times [2022-07-19 12:15:04,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:15:04,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749471118] [2022-07-19 12:15:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:15:04,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:15:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:15:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 560 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-19 12:15:05,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:15:05,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749471118] [2022-07-19 12:15:05,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749471118] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:15:05,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:15:05,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:15:05,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883764700] [2022-07-19 12:15:05,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:15:05,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:15:05,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:15:05,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:15:05,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:15:05,187 INFO L87 Difference]: Start difference. First operand 154710 states and 169137 transitions. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:15:08,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:15:08,931 INFO L93 Difference]: Finished difference Result 349221 states and 383419 transitions. [2022-07-19 12:15:08,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:15:08,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 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 735 [2022-07-19 12:15:08,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:15:09,223 INFO L225 Difference]: With dead ends: 349221 [2022-07-19 12:15:09,223 INFO L226 Difference]: Without dead ends: 195264 [2022-07-19 12:15:09,326 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 [2022-07-19 12:15:09,326 INFO L413 NwaCegarLoop]: 1290 mSDtfsCounter, 690 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2383 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 2764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 2383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:15:09,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 1298 Invalid, 2764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 2383 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-19 12:15:09,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195264 states.