./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label00.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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_label00.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 48b75eefd299c5e358d6f7c99602002262fce20f93b0f1303552b05fdc1d7cc8 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:37:28,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:37:28,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:37:28,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:37:28,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:37:28,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:37:28,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:37:28,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:37:28,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:37:28,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:37:28,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:37:28,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:37:28,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:37:28,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:37:28,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:37:28,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:37:28,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:37:28,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:37:28,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:37:28,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:37:28,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:37:28,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:37:28,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:37:28,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:37:28,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:37:28,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:37:28,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:37:28,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:37:28,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:37:28,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:37:28,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:37:28,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:37:28,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:37:28,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:37:28,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:37:28,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:37:28,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:37:28,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:37:28,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:37:28,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:37:28,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:37:28,714 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:37:28,747 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:37:28,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:37:28,748 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:37:28,748 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:37:28,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:37:28,749 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:37:28,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:37:28,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:37:28,750 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:37:28,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:37:28,751 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:37:28,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:37:28,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:37:28,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:37:28,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:37:28,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:37:28,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:37:28,752 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:37:28,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:37:28,753 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:37:28,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:37:28,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:37:28,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:37:28,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:37:28,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:37:28,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:37:28,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:37:28,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:37:28,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:37:28,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:37:28,756 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:37:28,756 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:37:28,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:37:28,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:37:28,757 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48b75eefd299c5e358d6f7c99602002262fce20f93b0f1303552b05fdc1d7cc8 [2021-12-15 09:37:28,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:37:29,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:37:29,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:37:29,012 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:37:29,013 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:37:29,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label00.c [2021-12-15 09:37:29,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e710330f/a89614218f004f5b9be8f6f36f37d310/FLAG13db71105 [2021-12-15 09:37:29,814 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:37:29,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label00.c [2021-12-15 09:37:29,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e710330f/a89614218f004f5b9be8f6f36f37d310/FLAG13db71105 [2021-12-15 09:37:30,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e710330f/a89614218f004f5b9be8f6f36f37d310 [2021-12-15 09:37:30,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:37:30,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:37:30,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:37:30,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:37:30,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:37:30,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:37:30" (1/1) ... [2021-12-15 09:37:30,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2159dede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:30, skipping insertion in model container [2021-12-15 09:37:30,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:37:30" (1/1) ... [2021-12-15 09:37:30,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:37:30,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:37:30,373 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_label00.c[2236,2249] [2021-12-15 09:37:31,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:37:31,060 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:37:31,076 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_label00.c[2236,2249] [2021-12-15 09:37:31,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:37:31,474 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:37:31,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:31 WrapperNode [2021-12-15 09:37:31,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:37:31,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:37:31,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:37:31,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:37:31,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:31" (1/1) ... [2021-12-15 09:37:31,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:31" (1/1) ... [2021-12-15 09:37:31,849 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-15 09:37:31,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:37:31,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:37:31,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:37:31,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:37:31,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:31" (1/1) ... [2021-12-15 09:37:31,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:31" (1/1) ... [2021-12-15 09:37:31,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:31" (1/1) ... [2021-12-15 09:37:31,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:31" (1/1) ... [2021-12-15 09:37:32,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:31" (1/1) ... [2021-12-15 09:37:32,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:31" (1/1) ... [2021-12-15 09:37:32,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:31" (1/1) ... [2021-12-15 09:37:32,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:37:32,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:37:32,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:37:32,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:37:32,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:31" (1/1) ... [2021-12-15 09:37:32,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:37:32,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:37:32,357 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) [2021-12-15 09:37:32,420 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 [2021-12-15 09:37:32,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:37:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:37:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:37:32,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:37:32,585 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:37:32,586 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:37:35,754 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:37:35,767 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:37:35,768 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:37:35,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:37:35 BoogieIcfgContainer [2021-12-15 09:37:35,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:37:35,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:37:35,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:37:35,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:37:35,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:37:30" (1/3) ... [2021-12-15 09:37:35,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbe8eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:37:35, skipping insertion in model container [2021-12-15 09:37:35,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:37:31" (2/3) ... [2021-12-15 09:37:35,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbe8eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:37:35, skipping insertion in model container [2021-12-15 09:37:35,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:37:35" (3/3) ... [2021-12-15 09:37:35,779 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label00.c [2021-12-15 09:37:35,783 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:37:35,784 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:37:35,830 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:37:35,838 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:37:35,838 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:37:35,876 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) [2021-12-15 09:37:35,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 09:37:35,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:37:35,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:37:35,885 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:37:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:37:35,895 INFO L85 PathProgramCache]: Analyzing trace with hash -884752143, now seen corresponding path program 1 times [2021-12-15 09:37:35,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:37:35,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539580898] [2021-12-15 09:37:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:37:35,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:37:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:37:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:37:36,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:37:36,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539580898] [2021-12-15 09:37:36,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539580898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:37:36,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:37:36,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:37:36,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928397849] [2021-12-15 09:37:36,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:37:36,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:37:36,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:37:36,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:37:36,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:37:36,146 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:39,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:37:39,496 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-12-15 09:37:39,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:37:39,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-15 09:37:39,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:37:39,518 INFO L225 Difference]: With dead ends: 2388 [2021-12-15 09:37:39,524 INFO L226 Difference]: Without dead ends: 1506 [2021-12-15 09:37:39,533 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:37:39,537 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 882 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:37:39,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 156 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 09:37:39,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-15 09:37:39,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-15 09:37:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.8458471760797341) internal successors, (2778), 1505 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2778 transitions. [2021-12-15 09:37:39,651 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2778 transitions. Word has length 15 [2021-12-15 09:37:39,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:37:39,651 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2778 transitions. [2021-12-15 09:37:39,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:39,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2778 transitions. [2021-12-15 09:37:39,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-15 09:37:39,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:37:39,655 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:37:39,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:37:39,656 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:37:39,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:37:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1163089374, now seen corresponding path program 1 times [2021-12-15 09:37:39,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:37:39,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073996831] [2021-12-15 09:37:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:37:39,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:37:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:37:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:37:39,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:37:39,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073996831] [2021-12-15 09:37:39,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073996831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:37:39,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:37:39,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:37:39,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343234652] [2021-12-15 09:37:39,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:37:39,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:37:39,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:37:39,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:37:39,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:37:39,845 INFO L87 Difference]: Start difference. First operand 1506 states and 2778 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:42,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:37:42,714 INFO L93 Difference]: Finished difference Result 3761 states and 6893 transitions. [2021-12-15 09:37:42,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:37:42,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-12-15 09:37:42,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:37:42,724 INFO L225 Difference]: With dead ends: 3761 [2021-12-15 09:37:42,724 INFO L226 Difference]: Without dead ends: 2257 [2021-12-15 09:37:42,726 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:37:42,730 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:37:42,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 448 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:37:42,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-12-15 09:37:42,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2021-12-15 09:37:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.4419326241134751) internal successors, (3253), 2256 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3253 transitions. [2021-12-15 09:37:42,780 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3253 transitions. Word has length 84 [2021-12-15 09:37:42,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:37:42,781 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3253 transitions. [2021-12-15 09:37:42,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:42,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3253 transitions. [2021-12-15 09:37:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-15 09:37:42,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:37:42,787 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:37:42,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:37:42,790 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:37:42,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:37:42,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1356240323, now seen corresponding path program 1 times [2021-12-15 09:37:42,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:37:42,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146595771] [2021-12-15 09:37:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:37:42,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:37:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:37:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:37:42,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:37:42,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146595771] [2021-12-15 09:37:42,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146595771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:37:42,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:37:42,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:37:42,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293107380] [2021-12-15 09:37:42,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:37:42,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:37:42,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:37:42,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:37:42,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:37:42,892 INFO L87 Difference]: Start difference. First operand 2257 states and 3253 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 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) [2021-12-15 09:37:46,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:37:46,092 INFO L93 Difference]: Finished difference Result 6765 states and 9754 transitions. [2021-12-15 09:37:46,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:37:46,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 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 [2021-12-15 09:37:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:37:46,110 INFO L225 Difference]: With dead ends: 6765 [2021-12-15 09:37:46,110 INFO L226 Difference]: Without dead ends: 4510 [2021-12-15 09:37:46,114 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:37:46,115 INFO L933 BasicCegarLoop]: 1370 mSDtfsCounter, 741 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:37:46,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 1378 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-15 09:37:46,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2021-12-15 09:37:46,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2021-12-15 09:37:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4509 states have (on average 1.3714792636948325) internal successors, (6184), 4509 states have internal predecessors, (6184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:46,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 6184 transitions. [2021-12-15 09:37:46,226 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 6184 transitions. Word has length 86 [2021-12-15 09:37:46,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:37:46,228 INFO L470 AbstractCegarLoop]: Abstraction has 4510 states and 6184 transitions. [2021-12-15 09:37:46,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 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) [2021-12-15 09:37:46,229 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 6184 transitions. [2021-12-15 09:37:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-15 09:37:46,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:37:46,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:37:46,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:37:46,237 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:37:46,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:37:46,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1798233458, now seen corresponding path program 1 times [2021-12-15 09:37:46,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:37:46,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990533009] [2021-12-15 09:37:46,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:37:46,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:37:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:37:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:37:46,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:37:46,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990533009] [2021-12-15 09:37:46,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990533009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:37:46,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:37:46,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:37:46,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975950588] [2021-12-15 09:37:46,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:37:46,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:37:46,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:37:46,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:37:46,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:37:46,374 INFO L87 Difference]: Start difference. First operand 4510 states and 6184 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:50,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:37:50,292 INFO L93 Difference]: Finished difference Result 9769 states and 13273 transitions. [2021-12-15 09:37:50,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:37:50,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2021-12-15 09:37:50,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:37:50,309 INFO L225 Difference]: With dead ends: 9769 [2021-12-15 09:37:50,310 INFO L226 Difference]: Without dead ends: 5261 [2021-12-15 09:37:50,314 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:37:50,315 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 2182 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4828 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2182 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 5487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 4828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:37:50,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2182 Valid, 240 Invalid, 5487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 4828 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-15 09:37:50,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-12-15 09:37:50,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2021-12-15 09:37:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.2979087452471483) internal successors, (6827), 5260 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 6827 transitions. [2021-12-15 09:37:50,400 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 6827 transitions. Word has length 92 [2021-12-15 09:37:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:37:50,400 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 6827 transitions. [2021-12-15 09:37:50,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 6827 transitions. [2021-12-15 09:37:50,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-15 09:37:50,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:37:50,407 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:37:50,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:37:50,407 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:37:50,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:37:50,408 INFO L85 PathProgramCache]: Analyzing trace with hash 763985376, now seen corresponding path program 1 times [2021-12-15 09:37:50,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:37:50,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638034468] [2021-12-15 09:37:50,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:37:50,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:37:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:37:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:37:50,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:37:50,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638034468] [2021-12-15 09:37:50,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638034468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:37:50,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:37:50,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:37:50,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491757004] [2021-12-15 09:37:50,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:37:50,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:37:50,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:37:50,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:37:50,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:37:50,556 INFO L87 Difference]: Start difference. First operand 5261 states and 6827 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:53,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:37:53,806 INFO L93 Difference]: Finished difference Result 12812 states and 17222 transitions. [2021-12-15 09:37:53,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:37:53,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 163 [2021-12-15 09:37:53,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:37:53,831 INFO L225 Difference]: With dead ends: 12812 [2021-12-15 09:37:53,831 INFO L226 Difference]: Without dead ends: 8267 [2021-12-15 09:37:53,836 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:37:53,837 INFO L933 BasicCegarLoop]: 599 mSDtfsCounter, 692 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3682 mSolverCounterSat, 657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 4339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 657 IncrementalHoareTripleChecker+Valid, 3682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:37:53,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 618 Invalid, 4339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [657 Valid, 3682 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 09:37:53,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2021-12-15 09:37:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 8265. [2021-12-15 09:37:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8265 states, 8264 states have (on average 1.1948209099709584) internal successors, (9874), 8264 states have internal predecessors, (9874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:53,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8265 states to 8265 states and 9874 transitions. [2021-12-15 09:37:53,961 INFO L78 Accepts]: Start accepts. Automaton has 8265 states and 9874 transitions. Word has length 163 [2021-12-15 09:37:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:37:53,963 INFO L470 AbstractCegarLoop]: Abstraction has 8265 states and 9874 transitions. [2021-12-15 09:37:53,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:53,966 INFO L276 IsEmpty]: Start isEmpty. Operand 8265 states and 9874 transitions. [2021-12-15 09:37:53,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-15 09:37:53,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:37:53,969 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:37:53,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:37:53,971 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:37:53,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:37:53,972 INFO L85 PathProgramCache]: Analyzing trace with hash -358179269, now seen corresponding path program 1 times [2021-12-15 09:37:53,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:37:53,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047082674] [2021-12-15 09:37:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:37:53,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:37:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:37:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-15 09:37:54,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:37:54,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047082674] [2021-12-15 09:37:54,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047082674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:37:54,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:37:54,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:37:54,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998727170] [2021-12-15 09:37:54,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:37:54,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:37:54,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:37:54,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:37:54,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:37:54,112 INFO L87 Difference]: Start difference. First operand 8265 states and 9874 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:37:56,539 INFO L93 Difference]: Finished difference Result 20285 states and 24949 transitions. [2021-12-15 09:37:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:37:56,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 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 237 [2021-12-15 09:37:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:37:56,576 INFO L225 Difference]: With dead ends: 20285 [2021-12-15 09:37:56,577 INFO L226 Difference]: Without dead ends: 12773 [2021-12-15 09:37:56,587 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:37:56,588 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:37:56,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 312 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:37:56,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12773 states. [2021-12-15 09:37:56,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12773 to 12020. [2021-12-15 09:37:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12020 states, 12019 states have (on average 1.1859555703469506) internal successors, (14254), 12019 states have internal predecessors, (14254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12020 states to 12020 states and 14254 transitions. [2021-12-15 09:37:56,816 INFO L78 Accepts]: Start accepts. Automaton has 12020 states and 14254 transitions. Word has length 237 [2021-12-15 09:37:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:37:56,816 INFO L470 AbstractCegarLoop]: Abstraction has 12020 states and 14254 transitions. [2021-12-15 09:37:56,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:56,817 INFO L276 IsEmpty]: Start isEmpty. Operand 12020 states and 14254 transitions. [2021-12-15 09:37:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-12-15 09:37:56,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:37:56,821 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:37:56,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:37:56,821 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:37:56,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:37:56,823 INFO L85 PathProgramCache]: Analyzing trace with hash -687622183, now seen corresponding path program 1 times [2021-12-15 09:37:56,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:37:56,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844975564] [2021-12-15 09:37:56,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:37:56,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:37:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:37:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 09:37:57,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:37:57,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844975564] [2021-12-15 09:37:57,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844975564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:37:57,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:37:57,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:37:57,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87023664] [2021-12-15 09:37:57,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:37:57,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:37:57,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:37:57,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:37:57,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:37:57,035 INFO L87 Difference]: Start difference. First operand 12020 states and 14254 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:59,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:37:59,665 INFO L93 Difference]: Finished difference Result 27793 states and 33809 transitions. [2021-12-15 09:37:59,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:37:59,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 304 [2021-12-15 09:37:59,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:37:59,701 INFO L225 Difference]: With dead ends: 27793 [2021-12-15 09:37:59,701 INFO L226 Difference]: Without dead ends: 16526 [2021-12-15 09:37:59,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:37:59,717 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 829 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 1005 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1005 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:37:59,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 142 Invalid, 3042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1005 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:37:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16526 states. [2021-12-15 09:37:59,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16526 to 16526. [2021-12-15 09:37:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16526 states, 16525 states have (on average 1.2055673222390317) internal successors, (19922), 16525 states have internal predecessors, (19922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:59,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16526 states to 16526 states and 19922 transitions. [2021-12-15 09:37:59,931 INFO L78 Accepts]: Start accepts. Automaton has 16526 states and 19922 transitions. Word has length 304 [2021-12-15 09:37:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:37:59,932 INFO L470 AbstractCegarLoop]: Abstraction has 16526 states and 19922 transitions. [2021-12-15 09:37:59,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:37:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 16526 states and 19922 transitions. [2021-12-15 09:37:59,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-12-15 09:37:59,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:37:59,975 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:37:59,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:37:59,975 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:37:59,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:37:59,975 INFO L85 PathProgramCache]: Analyzing trace with hash 2123838702, now seen corresponding path program 1 times [2021-12-15 09:37:59,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:37:59,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100764002] [2021-12-15 09:37:59,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:37:59,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 38 proven. 108 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-15 09:38:00,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:00,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100764002] [2021-12-15 09:38:00,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100764002] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:38:00,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235577379] [2021-12-15 09:38:00,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:00,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:38:00,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:38:00,184 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) [2021-12-15 09:38:00,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:38:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:00,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:38:00,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:38:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 09:38:00,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:38:00,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235577379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:00,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:38:00,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:38:00,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419121306] [2021-12-15 09:38:00,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:00,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:00,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:00,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:00,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:38:00,916 INFO L87 Difference]: Start difference. First operand 16526 states and 19922 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:03,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:03,397 INFO L93 Difference]: Finished difference Result 36054 states and 43961 transitions. [2021-12-15 09:38:03,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:03,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 333 [2021-12-15 09:38:03,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:03,436 INFO L225 Difference]: With dead ends: 36054 [2021-12-15 09:38:03,436 INFO L226 Difference]: Without dead ends: 20281 [2021-12-15 09:38:03,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:38:03,457 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 763 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 2782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:03,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 238 Invalid, 2782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 2075 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:38:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20281 states. [2021-12-15 09:38:03,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20281 to 20281. [2021-12-15 09:38:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20281 states, 20280 states have (on average 1.2054240631163708) internal successors, (24446), 20280 states have internal predecessors, (24446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:03,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20281 states to 20281 states and 24446 transitions. [2021-12-15 09:38:03,769 INFO L78 Accepts]: Start accepts. Automaton has 20281 states and 24446 transitions. Word has length 333 [2021-12-15 09:38:03,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:03,770 INFO L470 AbstractCegarLoop]: Abstraction has 20281 states and 24446 transitions. [2021-12-15 09:38:03,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:03,771 INFO L276 IsEmpty]: Start isEmpty. Operand 20281 states and 24446 transitions. [2021-12-15 09:38:03,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-12-15 09:38:03,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:03,776 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:38:03,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:38:03,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:38:03,992 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:03,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:03,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1173741446, now seen corresponding path program 1 times [2021-12-15 09:38:03,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:03,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758501094] [2021-12-15 09:38:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:03,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-15 09:38:04,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:04,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758501094] [2021-12-15 09:38:04,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758501094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:04,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:04,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:04,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713118378] [2021-12-15 09:38:04,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:04,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:04,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:04,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:04,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:04,123 INFO L87 Difference]: Start difference. First operand 20281 states and 24446 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:06,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:06,799 INFO L93 Difference]: Finished difference Result 49572 states and 60232 transitions. [2021-12-15 09:38:06,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:06,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 342 [2021-12-15 09:38:06,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:06,843 INFO L225 Difference]: With dead ends: 49572 [2021-12-15 09:38:06,843 INFO L226 Difference]: Without dead ends: 30044 [2021-12-15 09:38:06,868 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:38:06,868 INFO L933 BasicCegarLoop]: 1239 mSDtfsCounter, 635 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2625 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 2958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:06,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 1247 Invalid, 2958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2625 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:38:06,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30044 states. [2021-12-15 09:38:07,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30044 to 27791. [2021-12-15 09:38:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27791 states, 27790 states have (on average 1.2121266642677222) internal successors, (33685), 27790 states have internal predecessors, (33685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:07,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27791 states to 27791 states and 33685 transitions. [2021-12-15 09:38:07,343 INFO L78 Accepts]: Start accepts. Automaton has 27791 states and 33685 transitions. Word has length 342 [2021-12-15 09:38:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:07,344 INFO L470 AbstractCegarLoop]: Abstraction has 27791 states and 33685 transitions. [2021-12-15 09:38:07,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:07,344 INFO L276 IsEmpty]: Start isEmpty. Operand 27791 states and 33685 transitions. [2021-12-15 09:38:07,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-12-15 09:38:07,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:07,348 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:38:07,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:38:07,348 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:07,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:07,349 INFO L85 PathProgramCache]: Analyzing trace with hash 314874820, now seen corresponding path program 1 times [2021-12-15 09:38:07,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:07,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427505415] [2021-12-15 09:38:07,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:07,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-15 09:38:07,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:07,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427505415] [2021-12-15 09:38:07,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427505415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:07,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:07,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:07,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076222896] [2021-12-15 09:38:07,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:07,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:07,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:07,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:07,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:07,469 INFO L87 Difference]: Start difference. First operand 27791 states and 33685 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:10,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:10,275 INFO L93 Difference]: Finished difference Result 79612 states and 97144 transitions. [2021-12-15 09:38:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:10,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 346 [2021-12-15 09:38:10,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:10,333 INFO L225 Difference]: With dead ends: 79612 [2021-12-15 09:38:10,334 INFO L226 Difference]: Without dead ends: 48819 [2021-12-15 09:38:10,358 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:38:10,359 INFO L933 BasicCegarLoop]: 1307 mSDtfsCounter, 778 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:10,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1315 Invalid, 2854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:38:10,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48819 states. [2021-12-15 09:38:10,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48819 to 48068. [2021-12-15 09:38:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48068 states, 48067 states have (on average 1.1590488276780329) internal successors, (55712), 48067 states have internal predecessors, (55712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48068 states to 48068 states and 55712 transitions. [2021-12-15 09:38:11,173 INFO L78 Accepts]: Start accepts. Automaton has 48068 states and 55712 transitions. Word has length 346 [2021-12-15 09:38:11,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:11,174 INFO L470 AbstractCegarLoop]: Abstraction has 48068 states and 55712 transitions. [2021-12-15 09:38:11,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 48068 states and 55712 transitions. [2021-12-15 09:38:11,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2021-12-15 09:38:11,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:11,180 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:38:11,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:38:11,180 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:11,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1786331933, now seen corresponding path program 1 times [2021-12-15 09:38:11,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:11,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924099841] [2021-12-15 09:38:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:11,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 233 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-15 09:38:11,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:11,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924099841] [2021-12-15 09:38:11,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924099841] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:11,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:11,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:11,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255613220] [2021-12-15 09:38:11,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:11,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:11,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:11,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:11,319 INFO L87 Difference]: Start difference. First operand 48068 states and 55712 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:13,991 INFO L93 Difference]: Finished difference Result 95383 states and 110666 transitions. [2021-12-15 09:38:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:13,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 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 375 [2021-12-15 09:38:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:14,041 INFO L225 Difference]: With dead ends: 95383 [2021-12-15 09:38:14,041 INFO L226 Difference]: Without dead ends: 48068 [2021-12-15 09:38:14,066 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:38:14,066 INFO L933 BasicCegarLoop]: 1262 mSDtfsCounter, 669 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:14,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 1270 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 2228 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:38:14,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48068 states. [2021-12-15 09:38:14,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48068 to 46566. [2021-12-15 09:38:14,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46566 states, 46565 states have (on average 1.1175346290132073) internal successors, (52038), 46565 states have internal predecessors, (52038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46566 states to 46566 states and 52038 transitions. [2021-12-15 09:38:14,572 INFO L78 Accepts]: Start accepts. Automaton has 46566 states and 52038 transitions. Word has length 375 [2021-12-15 09:38:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:14,573 INFO L470 AbstractCegarLoop]: Abstraction has 46566 states and 52038 transitions. [2021-12-15 09:38:14,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand 46566 states and 52038 transitions. [2021-12-15 09:38:14,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2021-12-15 09:38:14,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:14,583 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2021-12-15 09:38:14,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:38:14,583 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:14,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:14,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1860464712, now seen corresponding path program 1 times [2021-12-15 09:38:14,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:14,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188749013] [2021-12-15 09:38:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:14,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-15 09:38:14,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:14,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188749013] [2021-12-15 09:38:14,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188749013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:14,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:14,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:14,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140928435] [2021-12-15 09:38:14,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:14,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:14,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:14,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:14,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:14,746 INFO L87 Difference]: Start difference. First operand 46566 states and 52038 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:17,785 INFO L93 Difference]: Finished difference Result 115660 states and 130705 transitions. [2021-12-15 09:38:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:17,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 450 [2021-12-15 09:38:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:17,865 INFO L225 Difference]: With dead ends: 115660 [2021-12-15 09:38:17,865 INFO L226 Difference]: Without dead ends: 69847 [2021-12-15 09:38:17,886 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:38:17,887 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 778 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2275 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 2275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:17,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 497 Invalid, 2833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 2275 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:38:17,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69847 states. [2021-12-15 09:38:18,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69847 to 66092. [2021-12-15 09:38:18,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66092 states, 66091 states have (on average 1.1083808688021062) internal successors, (73254), 66091 states have internal predecessors, (73254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:18,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66092 states to 66092 states and 73254 transitions. [2021-12-15 09:38:18,583 INFO L78 Accepts]: Start accepts. Automaton has 66092 states and 73254 transitions. Word has length 450 [2021-12-15 09:38:18,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:18,584 INFO L470 AbstractCegarLoop]: Abstraction has 66092 states and 73254 transitions. [2021-12-15 09:38:18,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:18,584 INFO L276 IsEmpty]: Start isEmpty. Operand 66092 states and 73254 transitions. [2021-12-15 09:38:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2021-12-15 09:38:18,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:18,601 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:38:18,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:38:18,602 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:18,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:18,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1858215506, now seen corresponding path program 1 times [2021-12-15 09:38:18,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:18,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075150618] [2021-12-15 09:38:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:18,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 529 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-12-15 09:38:18,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:18,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075150618] [2021-12-15 09:38:18,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075150618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:18,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:18,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:18,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341415220] [2021-12-15 09:38:18,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:18,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:18,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:18,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:18,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:19,000 INFO L87 Difference]: Start difference. First operand 66092 states and 73254 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:21,830 INFO L93 Difference]: Finished difference Result 134435 states and 148840 transitions. [2021-12-15 09:38:21,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:21,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 545 [2021-12-15 09:38:21,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:21,913 INFO L225 Difference]: With dead ends: 134435 [2021-12-15 09:38:21,913 INFO L226 Difference]: Without dead ends: 69096 [2021-12-15 09:38:21,941 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:38:21,942 INFO L933 BasicCegarLoop]: 1178 mSDtfsCounter, 686 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:21,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 1185 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2081 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:38:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69096 states. [2021-12-15 09:38:22,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69096 to 66843. [2021-12-15 09:38:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66843 states, 66842 states have (on average 1.0686843601328506) internal successors, (71433), 66842 states have internal predecessors, (71433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:22,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66843 states to 66843 states and 71433 transitions. [2021-12-15 09:38:22,789 INFO L78 Accepts]: Start accepts. Automaton has 66843 states and 71433 transitions. Word has length 545 [2021-12-15 09:38:22,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:22,789 INFO L470 AbstractCegarLoop]: Abstraction has 66843 states and 71433 transitions. [2021-12-15 09:38:22,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:22,790 INFO L276 IsEmpty]: Start isEmpty. Operand 66843 states and 71433 transitions. [2021-12-15 09:38:22,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2021-12-15 09:38:22,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:22,824 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:38:22,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:38:22,825 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:22,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:22,825 INFO L85 PathProgramCache]: Analyzing trace with hash 73847232, now seen corresponding path program 1 times [2021-12-15 09:38:22,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:22,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009688820] [2021-12-15 09:38:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:22,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2021-12-15 09:38:23,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:23,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009688820] [2021-12-15 09:38:23,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009688820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:23,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:23,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:23,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548394958] [2021-12-15 09:38:23,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:23,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:23,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:23,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:23,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:23,046 INFO L87 Difference]: Start difference. First operand 66843 states and 71433 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)