./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label25.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label25.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 244b722e357e7e628c9da22f49af73d4219044ff60ec5c18a778f01607618372 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 13:15:14,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 13:15:14,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 13:15:14,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 13:15:14,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 13:15:14,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 13:15:14,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 13:15:14,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 13:15:14,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 13:15:14,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 13:15:14,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 13:15:14,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 13:15:14,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 13:15:14,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 13:15:14,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 13:15:14,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 13:15:14,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 13:15:14,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 13:15:14,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 13:15:14,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 13:15:14,839 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 13:15:14,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 13:15:14,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 13:15:14,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 13:15:14,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 13:15:14,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 13:15:14,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 13:15:14,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 13:15:14,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 13:15:14,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 13:15:14,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 13:15:14,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 13:15:14,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 13:15:14,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 13:15:14,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 13:15:14,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 13:15:14,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 13:15:14,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 13:15:14,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 13:15:14,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 13:15:14,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 13:15:14,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 13:15:14,863 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 13:15:14,884 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 13:15:14,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 13:15:14,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 13:15:14,885 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 13:15:14,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 13:15:14,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 13:15:14,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 13:15:14,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 13:15:14,886 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 13:15:14,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 13:15:14,887 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 13:15:14,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 13:15:14,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 13:15:14,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 13:15:14,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 13:15:14,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 13:15:14,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 13:15:14,888 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 13:15:14,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 13:15:14,888 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 13:15:14,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 13:15:14,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 13:15:14,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 13:15:14,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 13:15:14,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:15:14,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 13:15:14,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 13:15:14,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 13:15:14,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 13:15:14,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 13:15:14,890 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 13:15:14,890 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 13:15:14,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 13:15:14,890 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 244b722e357e7e628c9da22f49af73d4219044ff60ec5c18a778f01607618372 [2022-07-13 13:15:15,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 13:15:15,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 13:15:15,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 13:15:15,102 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 13:15:15,102 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 13:15:15,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label25.c [2022-07-13 13:15:15,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89ec88528/402b5d0a14ff4340a2328b15a65d3096/FLAG7d6a593a9 [2022-07-13 13:15:15,692 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 13:15:15,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label25.c [2022-07-13 13:15:15,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89ec88528/402b5d0a14ff4340a2328b15a65d3096/FLAG7d6a593a9 [2022-07-13 13:15:15,938 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89ec88528/402b5d0a14ff4340a2328b15a65d3096 [2022-07-13 13:15:15,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 13:15:15,943 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 13:15:15,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 13:15:15,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 13:15:15,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 13:15:15,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:15:15" (1/1) ... [2022-07-13 13:15:15,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31d18848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:15, skipping insertion in model container [2022-07-13 13:15:15,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:15:15" (1/1) ... [2022-07-13 13:15:15,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 13:15:16,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 13:15:16,164 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/Problem17_label25.c[3642,3655] [2022-07-13 13:15:16,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:15:16,576 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 13:15:16,597 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/Problem17_label25.c[3642,3655] [2022-07-13 13:15:16,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:15:16,836 INFO L208 MainTranslator]: Completed translation [2022-07-13 13:15:16,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:16 WrapperNode [2022-07-13 13:15:16,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 13:15:16,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 13:15:16,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 13:15:16,838 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 13:15:16,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:16" (1/1) ... [2022-07-13 13:15:16,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:16" (1/1) ... [2022-07-13 13:15:17,034 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-13 13:15:17,034 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 13:15:17,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 13:15:17,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 13:15:17,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 13:15:17,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:16" (1/1) ... [2022-07-13 13:15:17,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:16" (1/1) ... [2022-07-13 13:15:17,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:16" (1/1) ... [2022-07-13 13:15:17,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:16" (1/1) ... [2022-07-13 13:15:17,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:16" (1/1) ... [2022-07-13 13:15:17,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:16" (1/1) ... [2022-07-13 13:15:17,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:16" (1/1) ... [2022-07-13 13:15:17,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 13:15:17,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 13:15:17,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 13:15:17,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 13:15:17,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:16" (1/1) ... [2022-07-13 13:15:17,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:15:17,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:15:17,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 13:15:17,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 13:15:17,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 13:15:17,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 13:15:17,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 13:15:17,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 13:15:17,384 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 13:15:17,386 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 13:15:19,667 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 13:15:19,693 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 13:15:19,693 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 13:15:19,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:15:19 BoogieIcfgContainer [2022-07-13 13:15:19,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 13:15:19,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 13:15:19,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 13:15:19,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 13:15:19,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 01:15:15" (1/3) ... [2022-07-13 13:15:19,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@354ae448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:15:19, skipping insertion in model container [2022-07-13 13:15:19,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:16" (2/3) ... [2022-07-13 13:15:19,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@354ae448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:15:19, skipping insertion in model container [2022-07-13 13:15:19,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:15:19" (3/3) ... [2022-07-13 13:15:19,700 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label25.c [2022-07-13 13:15:19,709 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 13:15:19,709 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 13:15:19,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 13:15:19,766 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1efd7378, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@46b50317 [2022-07-13 13:15:19,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 13:15:19,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:19,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-13 13:15:19,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:19,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:19,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:19,787 INFO L85 PathProgramCache]: Analyzing trace with hash -573341295, now seen corresponding path program 1 times [2022-07-13 13:15:19,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:19,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997169965] [2022-07-13 13:15:19,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:19,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:15:19,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:19,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997169965] [2022-07-13 13:15:19,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997169965] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:19,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:19,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:15:19,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220083462] [2022-07-13 13:15:19,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:19,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:19,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:20,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:20,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:20,005 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:22,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:22,334 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2022-07-13 13:15:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:22,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2022-07-13 13:15:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:22,350 INFO L225 Difference]: With dead ends: 1644 [2022-07-13 13:15:22,351 INFO L226 Difference]: Without dead ends: 977 [2022-07-13 13:15:22,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:22,358 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 465 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:22,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 13:15:22,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-07-13 13:15:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2022-07-13 13:15:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2022-07-13 13:15:22,426 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 23 [2022-07-13 13:15:22,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:22,426 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2022-07-13 13:15:22,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2022-07-13 13:15:22,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 13:15:22,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:22,429 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 13:15:22,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 13:15:22,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:22,430 INFO L85 PathProgramCache]: Analyzing trace with hash 977233274, now seen corresponding path program 1 times [2022-07-13 13:15:22,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:22,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142559310] [2022-07-13 13:15:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:22,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:15:22,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:22,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142559310] [2022-07-13 13:15:22,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142559310] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:22,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:22,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:15:22,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137142236] [2022-07-13 13:15:22,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:22,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:22,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:22,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:22,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:22,529 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:24,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:24,520 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2022-07-13 13:15:24,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:24,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2022-07-13 13:15:24,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:24,527 INFO L225 Difference]: With dead ends: 2813 [2022-07-13 13:15:24,527 INFO L226 Difference]: Without dead ends: 1844 [2022-07-13 13:15:24,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:24,530 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:24,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 13:15:24,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-07-13 13:15:24,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2022-07-13 13:15:24,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:24,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2022-07-13 13:15:24,562 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 90 [2022-07-13 13:15:24,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:24,562 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2022-07-13 13:15:24,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2022-07-13 13:15:24,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-13 13:15:24,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:24,564 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:24,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 13:15:24,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:24,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:24,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1040101436, now seen corresponding path program 1 times [2022-07-13 13:15:24,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:24,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150093952] [2022-07-13 13:15:24,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:24,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:15:24,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:24,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150093952] [2022-07-13 13:15:24,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150093952] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:24,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:24,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:24,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834210422] [2022-07-13 13:15:24,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:24,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:24,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:24,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:24,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:24,648 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:26,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:26,509 INFO L93 Difference]: Finished difference Result 4552 states and 6282 transitions. [2022-07-13 13:15:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:26,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2022-07-13 13:15:26,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:26,518 INFO L225 Difference]: With dead ends: 4552 [2022-07-13 13:15:26,518 INFO L226 Difference]: Without dead ends: 2713 [2022-07-13 13:15:26,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:26,522 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 484 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:26,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 886 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 13:15:26,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-07-13 13:15:26,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2022-07-13 13:15:26,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3003690036900368) internal successors, (3524), 2710 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:26,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3524 transitions. [2022-07-13 13:15:26,570 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3524 transitions. Word has length 93 [2022-07-13 13:15:26,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:26,571 INFO L495 AbstractCegarLoop]: Abstraction has 2711 states and 3524 transitions. [2022-07-13 13:15:26,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:26,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3524 transitions. [2022-07-13 13:15:26,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-13 13:15:26,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:26,574 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:26,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 13:15:26,575 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:26,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:26,575 INFO L85 PathProgramCache]: Analyzing trace with hash 153064972, now seen corresponding path program 1 times [2022-07-13 13:15:26,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:26,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088049667] [2022-07-13 13:15:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:26,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:26,701 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-13 13:15:26,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:26,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088049667] [2022-07-13 13:15:26,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088049667] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:26,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:26,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:15:26,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306096055] [2022-07-13 13:15:26,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:26,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:26,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:26,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:26,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:26,704 INFO L87 Difference]: Start difference. First operand 2711 states and 3524 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:28,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:28,399 INFO L93 Difference]: Finished difference Result 7984 states and 10361 transitions. [2022-07-13 13:15:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:28,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2022-07-13 13:15:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:28,411 INFO L225 Difference]: With dead ends: 7984 [2022-07-13 13:15:28,411 INFO L226 Difference]: Without dead ends: 4421 [2022-07-13 13:15:28,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:28,415 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:28,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:15:28,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2022-07-13 13:15:28,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3571. [2022-07-13 13:15:28,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 1.1775910364145659) internal successors, (4204), 3570 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4204 transitions. [2022-07-13 13:15:28,483 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4204 transitions. Word has length 162 [2022-07-13 13:15:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:28,483 INFO L495 AbstractCegarLoop]: Abstraction has 3571 states and 4204 transitions. [2022-07-13 13:15:28,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4204 transitions. [2022-07-13 13:15:28,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-13 13:15:28,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:28,485 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:28,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 13:15:28,486 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:28,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:28,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1508695954, now seen corresponding path program 1 times [2022-07-13 13:15:28,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:28,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438710403] [2022-07-13 13:15:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:28,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:15:28,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:28,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438710403] [2022-07-13 13:15:28,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438710403] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:28,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:28,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:28,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631394346] [2022-07-13 13:15:28,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:28,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:28,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:28,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:28,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:28,610 INFO L87 Difference]: Start difference. First operand 3571 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:29,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:29,966 INFO L93 Difference]: Finished difference Result 9273 states and 11087 transitions. [2022-07-13 13:15:29,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:29,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2022-07-13 13:15:29,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:29,980 INFO L225 Difference]: With dead ends: 9273 [2022-07-13 13:15:29,981 INFO L226 Difference]: Without dead ends: 5704 [2022-07-13 13:15:29,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:29,985 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:29,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 13:15:29,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2022-07-13 13:15:30,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5704. [2022-07-13 13:15:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 1.1595651411537786) internal successors, (6613), 5703 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 6613 transitions. [2022-07-13 13:15:30,057 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 6613 transitions. Word has length 175 [2022-07-13 13:15:30,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:30,058 INFO L495 AbstractCegarLoop]: Abstraction has 5704 states and 6613 transitions. [2022-07-13 13:15:30,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:30,058 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 6613 transitions. [2022-07-13 13:15:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-07-13 13:15:30,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:30,063 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:30,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 13:15:30,063 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:30,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:30,064 INFO L85 PathProgramCache]: Analyzing trace with hash 311018387, now seen corresponding path program 1 times [2022-07-13 13:15:30,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:30,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164283505] [2022-07-13 13:15:30,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:30,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-13 13:15:30,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:30,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164283505] [2022-07-13 13:15:30,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164283505] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:30,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:30,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:30,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827111878] [2022-07-13 13:15:30,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:30,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:30,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:30,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:30,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:30,147 INFO L87 Difference]: Start difference. First operand 5704 states and 6613 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:31,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:31,827 INFO L93 Difference]: Finished difference Result 14376 states and 16776 transitions. [2022-07-13 13:15:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 177 [2022-07-13 13:15:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:31,846 INFO L225 Difference]: With dead ends: 14376 [2022-07-13 13:15:31,846 INFO L226 Difference]: Without dead ends: 8673 [2022-07-13 13:15:31,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:31,853 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 428 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:31,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:15:31,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8673 states. [2022-07-13 13:15:31,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8673 to 5677. [2022-07-13 13:15:31,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5677 states, 5676 states have (on average 1.1578576462297392) internal successors, (6572), 5676 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 6572 transitions. [2022-07-13 13:15:31,953 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 6572 transitions. Word has length 177 [2022-07-13 13:15:31,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:31,954 INFO L495 AbstractCegarLoop]: Abstraction has 5677 states and 6572 transitions. [2022-07-13 13:15:31,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:31,954 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 6572 transitions. [2022-07-13 13:15:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-13 13:15:31,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:31,958 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:31,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 13:15:31,958 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:31,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:31,959 INFO L85 PathProgramCache]: Analyzing trace with hash 686495377, now seen corresponding path program 1 times [2022-07-13 13:15:31,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:31,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866434492] [2022-07-13 13:15:31,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:31,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-13 13:15:32,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:32,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866434492] [2022-07-13 13:15:32,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866434492] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:32,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:32,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:32,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310916139] [2022-07-13 13:15:32,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:32,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:32,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:32,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:32,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:32,081 INFO L87 Difference]: Start difference. First operand 5677 states and 6572 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:33,630 INFO L93 Difference]: Finished difference Result 14315 states and 16680 transitions. [2022-07-13 13:15:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:33,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 255 [2022-07-13 13:15:33,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:33,648 INFO L225 Difference]: With dead ends: 14315 [2022-07-13 13:15:33,648 INFO L226 Difference]: Without dead ends: 7790 [2022-07-13 13:15:33,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:33,655 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 383 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:33,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 847 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:15:33,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2022-07-13 13:15:33,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 7790. [2022-07-13 13:15:33,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7790 states, 7789 states have (on average 1.1186288355372962) internal successors, (8713), 7789 states have internal predecessors, (8713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:33,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7790 states to 7790 states and 8713 transitions. [2022-07-13 13:15:33,756 INFO L78 Accepts]: Start accepts. Automaton has 7790 states and 8713 transitions. Word has length 255 [2022-07-13 13:15:33,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:33,757 INFO L495 AbstractCegarLoop]: Abstraction has 7790 states and 8713 transitions. [2022-07-13 13:15:33,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:33,757 INFO L276 IsEmpty]: Start isEmpty. Operand 7790 states and 8713 transitions. [2022-07-13 13:15:33,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-07-13 13:15:33,760 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:33,760 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:33,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 13:15:33,761 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:33,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1527796204, now seen corresponding path program 1 times [2022-07-13 13:15:33,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:33,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590804593] [2022-07-13 13:15:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:33,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-07-13 13:15:33,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:33,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590804593] [2022-07-13 13:15:33,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590804593] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:33,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:33,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:33,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753647163] [2022-07-13 13:15:33,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:33,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:33,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:33,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:33,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:33,879 INFO L87 Difference]: Start difference. First operand 7790 states and 8713 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:35,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:35,420 INFO L93 Difference]: Finished difference Result 18558 states and 20949 transitions. [2022-07-13 13:15:35,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:35,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 295 [2022-07-13 13:15:35,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:35,442 INFO L225 Difference]: With dead ends: 18558 [2022-07-13 13:15:35,442 INFO L226 Difference]: Without dead ends: 10770 [2022-07-13 13:15:35,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:35,449 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 482 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:35,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 330 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:15:35,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10770 states. [2022-07-13 13:15:35,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10770 to 9916. [2022-07-13 13:15:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9916 states, 9915 states have (on average 1.1232476046394353) internal successors, (11137), 9915 states have internal predecessors, (11137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:35,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9916 states to 9916 states and 11137 transitions. [2022-07-13 13:15:35,535 INFO L78 Accepts]: Start accepts. Automaton has 9916 states and 11137 transitions. Word has length 295 [2022-07-13 13:15:35,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:35,535 INFO L495 AbstractCegarLoop]: Abstraction has 9916 states and 11137 transitions. [2022-07-13 13:15:35,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:35,536 INFO L276 IsEmpty]: Start isEmpty. Operand 9916 states and 11137 transitions. [2022-07-13 13:15:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-07-13 13:15:35,539 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:35,539 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:35,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 13:15:35,540 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:35,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:35,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1391208072, now seen corresponding path program 1 times [2022-07-13 13:15:35,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:35,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142116083] [2022-07-13 13:15:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:35,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:15:35,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:35,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142116083] [2022-07-13 13:15:35,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142116083] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:15:35,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214378419] [2022-07-13 13:15:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:35,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:15:35,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:15:35,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:15:35,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 13:15:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:35,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 13:15:35,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:15:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 21 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:15:36,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:15:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:15:36,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214378419] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 13:15:36,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 13:15:36,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 7 [2022-07-13 13:15:36,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121792266] [2022-07-13 13:15:36,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:36,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 13:15:36,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:36,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 13:15:36,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:15:36,734 INFO L87 Difference]: Start difference. First operand 9916 states and 11137 transitions. Second operand has 5 states, 5 states have (on average 62.4) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:39,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:39,854 INFO L93 Difference]: Finished difference Result 32643 states and 37072 transitions. [2022-07-13 13:15:39,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 13:15:39,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 62.4) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 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 312 [2022-07-13 13:15:39,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:39,885 INFO L225 Difference]: With dead ends: 32643 [2022-07-13 13:15:39,886 INFO L226 Difference]: Without dead ends: 22300 [2022-07-13 13:15:39,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 617 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:15:39,900 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1312 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 3305 mSolverCounterSat, 678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 3983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 3305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:39,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1312 Valid, 256 Invalid, 3983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 3305 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-13 13:15:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22300 states. [2022-07-13 13:15:40,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22300 to 20170. [2022-07-13 13:15:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20170 states, 20169 states have (on average 1.1309931082354108) internal successors, (22811), 20169 states have internal predecessors, (22811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:40,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20170 states to 20170 states and 22811 transitions. [2022-07-13 13:15:40,167 INFO L78 Accepts]: Start accepts. Automaton has 20170 states and 22811 transitions. Word has length 312 [2022-07-13 13:15:40,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:40,168 INFO L495 AbstractCegarLoop]: Abstraction has 20170 states and 22811 transitions. [2022-07-13 13:15:40,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.4) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:40,168 INFO L276 IsEmpty]: Start isEmpty. Operand 20170 states and 22811 transitions. [2022-07-13 13:15:40,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-07-13 13:15:40,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:40,172 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:40,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 13:15:40,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:15:40,392 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:40,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:40,393 INFO L85 PathProgramCache]: Analyzing trace with hash -92363419, now seen corresponding path program 1 times [2022-07-13 13:15:40,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:40,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601590145] [2022-07-13 13:15:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:40,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-13 13:15:40,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:40,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601590145] [2022-07-13 13:15:40,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601590145] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:40,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:40,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:40,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829304651] [2022-07-13 13:15:40,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:40,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:40,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:40,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:40,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:40,539 INFO L87 Difference]: Start difference. First operand 20170 states and 22811 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:42,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:42,484 INFO L93 Difference]: Finished difference Result 49721 states and 56259 transitions. [2022-07-13 13:15:42,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:42,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 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 335 [2022-07-13 13:15:42,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:42,521 INFO L225 Difference]: With dead ends: 49721 [2022-07-13 13:15:42,522 INFO L226 Difference]: Without dead ends: 29553 [2022-07-13 13:15:42,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:42,542 INFO L413 NwaCegarLoop]: 819 mSDtfsCounter, 435 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:42,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 880 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 13:15:42,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29553 states. [2022-07-13 13:15:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29553 to 27408. [2022-07-13 13:15:42,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27408 states, 27407 states have (on average 1.1210274747327325) internal successors, (30724), 27407 states have internal predecessors, (30724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:42,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27408 states to 27408 states and 30724 transitions. [2022-07-13 13:15:42,920 INFO L78 Accepts]: Start accepts. Automaton has 27408 states and 30724 transitions. Word has length 335 [2022-07-13 13:15:42,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:42,920 INFO L495 AbstractCegarLoop]: Abstraction has 27408 states and 30724 transitions. [2022-07-13 13:15:42,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 27408 states and 30724 transitions. [2022-07-13 13:15:42,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-07-13 13:15:42,925 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:42,926 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:42,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 13:15:42,926 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:42,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:42,927 INFO L85 PathProgramCache]: Analyzing trace with hash 751288183, now seen corresponding path program 1 times [2022-07-13 13:15:42,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:42,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854451126] [2022-07-13 13:15:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:42,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:15:43,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:43,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854451126] [2022-07-13 13:15:43,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854451126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:43,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:43,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:43,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661648626] [2022-07-13 13:15:43,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:43,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:43,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:43,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:43,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:43,044 INFO L87 Difference]: Start difference. First operand 27408 states and 30724 transitions. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:45,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:45,101 INFO L93 Difference]: Finished difference Result 68024 states and 76175 transitions. [2022-07-13 13:15:45,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:45,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 383 [2022-07-13 13:15:45,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:45,150 INFO L225 Difference]: With dead ends: 68024 [2022-07-13 13:15:45,151 INFO L226 Difference]: Without dead ends: 40618 [2022-07-13 13:15:45,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:45,175 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 421 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:45,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 756 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 13:15:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40618 states. [2022-07-13 13:15:45,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40618 to 37615. [2022-07-13 13:15:45,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37615 states, 37614 states have (on average 1.1138937629605998) internal successors, (41898), 37614 states have internal predecessors, (41898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:45,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37615 states to 37615 states and 41898 transitions. [2022-07-13 13:15:45,745 INFO L78 Accepts]: Start accepts. Automaton has 37615 states and 41898 transitions. Word has length 383 [2022-07-13 13:15:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:45,757 INFO L495 AbstractCegarLoop]: Abstraction has 37615 states and 41898 transitions. [2022-07-13 13:15:45,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:45,757 INFO L276 IsEmpty]: Start isEmpty. Operand 37615 states and 41898 transitions. [2022-07-13 13:15:45,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-07-13 13:15:45,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:45,767 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:45,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 13:15:45,768 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:45,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:45,768 INFO L85 PathProgramCache]: Analyzing trace with hash -363636585, now seen corresponding path program 1 times [2022-07-13 13:15:45,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:45,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404655339] [2022-07-13 13:15:45,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:45,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 331 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:15:45,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:45,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404655339] [2022-07-13 13:15:45,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404655339] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:45,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:45,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:15:45,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862586355] [2022-07-13 13:15:45,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:45,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:15:45,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:45,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:15:45,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:15:45,909 INFO L87 Difference]: Start difference. First operand 37615 states and 41898 transitions. Second operand has 4 states, 4 states have (on average 101.25) internal successors, (405), 4 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:48,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:48,769 INFO L93 Difference]: Finished difference Result 99095 states and 109991 transitions. [2022-07-13 13:15:48,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:15:48,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.25) internal successors, (405), 4 states have internal predecessors, (405), 0 states have call successors, (0), 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 405 [2022-07-13 13:15:48,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:48,833 INFO L225 Difference]: With dead ends: 99095 [2022-07-13 13:15:48,833 INFO L226 Difference]: Without dead ends: 61482 [2022-07-13 13:15:48,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:15:48,862 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 730 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:48,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 187 Invalid, 2901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-13 13:15:48,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61482 states. [2022-07-13 13:15:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61482 to 56363. [2022-07-13 13:15:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56363 states, 56362 states have (on average 1.1103580426528512) internal successors, (62582), 56362 states have internal predecessors, (62582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56363 states to 56363 states and 62582 transitions. [2022-07-13 13:15:49,524 INFO L78 Accepts]: Start accepts. Automaton has 56363 states and 62582 transitions. Word has length 405 [2022-07-13 13:15:49,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:49,525 INFO L495 AbstractCegarLoop]: Abstraction has 56363 states and 62582 transitions. [2022-07-13 13:15:49,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.25) internal successors, (405), 4 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:49,525 INFO L276 IsEmpty]: Start isEmpty. Operand 56363 states and 62582 transitions. [2022-07-13 13:15:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-07-13 13:15:49,531 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:49,531 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:49,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 13:15:49,531 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:49,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:49,532 INFO L85 PathProgramCache]: Analyzing trace with hash 232477028, now seen corresponding path program 1 times [2022-07-13 13:15:49,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:49,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145366762] [2022-07-13 13:15:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:49,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-13 13:15:49,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:49,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145366762] [2022-07-13 13:15:49,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145366762] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:49,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:49,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:49,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895485896] [2022-07-13 13:15:49,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:49,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:49,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:49,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:49,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:49,657 INFO L87 Difference]: Start difference. First operand 56363 states and 62582 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:51,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:51,565 INFO L93 Difference]: Finished difference Result 123357 states and 137708 transitions. [2022-07-13 13:15:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:51,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 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 427 [2022-07-13 13:15:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:51,631 INFO L225 Difference]: With dead ends: 123357 [2022-07-13 13:15:51,631 INFO L226 Difference]: Without dead ends: 64430 [2022-07-13 13:15:51,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:51,663 INFO L413 NwaCegarLoop]: 661 mSDtfsCounter, 511 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:51,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 712 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:15:51,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64430 states. [2022-07-13 13:15:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64430 to 64421. [2022-07-13 13:15:52,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64421 states, 64420 states have (on average 1.1002018006830176) internal successors, (70875), 64420 states have internal predecessors, (70875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64421 states to 64421 states and 70875 transitions. [2022-07-13 13:15:52,407 INFO L78 Accepts]: Start accepts. Automaton has 64421 states and 70875 transitions. Word has length 427 [2022-07-13 13:15:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:52,407 INFO L495 AbstractCegarLoop]: Abstraction has 64421 states and 70875 transitions. [2022-07-13 13:15:52,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 64421 states and 70875 transitions. [2022-07-13 13:15:52,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2022-07-13 13:15:52,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:52,418 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:52,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 13:15:52,418 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:52,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:52,418 INFO L85 PathProgramCache]: Analyzing trace with hash -542720110, now seen corresponding path program 1 times [2022-07-13 13:15:52,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:52,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340678180] [2022-07-13 13:15:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:52,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2022-07-13 13:15:52,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:52,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340678180] [2022-07-13 13:15:52,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340678180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:52,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:52,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:52,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678682845] [2022-07-13 13:15:52,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:52,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:52,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:52,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:52,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:52,710 INFO L87 Difference]: Start difference. First operand 64421 states and 70875 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:54,640 INFO L93 Difference]: Finished difference Result 140768 states and 155006 transitions. [2022-07-13 13:15:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:54,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 472 [2022-07-13 13:15:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:54,718 INFO L225 Difference]: With dead ends: 140768 [2022-07-13 13:15:54,718 INFO L226 Difference]: Without dead ends: 73791 [2022-07-13 13:15:54,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:54,756 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 436 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:54,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 785 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:15:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73791 states. [2022-07-13 13:15:55,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73791 to 72499. [2022-07-13 13:15:55,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72499 states, 72498 states have (on average 1.091588733482303) internal successors, (79138), 72498 states have internal predecessors, (79138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:55,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72499 states to 72499 states and 79138 transitions. [2022-07-13 13:15:55,702 INFO L78 Accepts]: Start accepts. Automaton has 72499 states and 79138 transitions. Word has length 472 [2022-07-13 13:15:55,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:55,703 INFO L495 AbstractCegarLoop]: Abstraction has 72499 states and 79138 transitions. [2022-07-13 13:15:55,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:55,703 INFO L276 IsEmpty]: Start isEmpty. Operand 72499 states and 79138 transitions. [2022-07-13 13:15:55,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-07-13 13:15:55,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:55,726 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:55,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 13:15:55,727 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:55,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1783078949, now seen corresponding path program 1 times [2022-07-13 13:15:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:55,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73411778] [2022-07-13 13:15:55,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:55,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 299 proven. 82 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 13:15:55,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:55,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73411778] [2022-07-13 13:15:55,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73411778] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:15:55,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124107608] [2022-07-13 13:15:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:55,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:15:55,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:15:55,972 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:15:55,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 13:15:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:56,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 13:15:56,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:15:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 299 proven. 82 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 13:15:56,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:15:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 299 proven. 82 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 13:15:57,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124107608] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 13:15:57,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 13:15:57,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-07-13 13:15:57,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271119355] [2022-07-13 13:15:57,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 13:15:57,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 13:15:57,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:57,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 13:15:57,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-13 13:15:57,564 INFO L87 Difference]: Start difference. First operand 72499 states and 79138 transitions. Second operand has 10 states, 10 states have (on average 97.6) internal successors, (976), 9 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:04,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:04,089 INFO L93 Difference]: Finished difference Result 188937 states and 205900 transitions. [2022-07-13 13:16:04,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 13:16:04,089 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 97.6) internal successors, (976), 9 states have internal predecessors, (976), 0 states have call successors, (0), 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 476 [2022-07-13 13:16:04,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:04,211 INFO L225 Difference]: With dead ends: 188937 [2022-07-13 13:16:04,212 INFO L226 Difference]: Without dead ends: 116440 [2022-07-13 13:16:04,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 947 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-07-13 13:16:04,230 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 3715 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 6895 mSolverCounterSat, 1301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3715 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 8196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1301 IncrementalHoareTripleChecker+Valid, 6895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:04,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3715 Valid, 438 Invalid, 8196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1301 Valid, 6895 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-07-13 13:16:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116440 states. [2022-07-13 13:16:05,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116440 to 109135. [2022-07-13 13:16:05,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109135 states, 109134 states have (on average 1.0838052302673777) internal successors, (118280), 109134 states have internal predecessors, (118280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109135 states to 109135 states and 118280 transitions. [2022-07-13 13:16:05,594 INFO L78 Accepts]: Start accepts. Automaton has 109135 states and 118280 transitions. Word has length 476 [2022-07-13 13:16:05,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:05,594 INFO L495 AbstractCegarLoop]: Abstraction has 109135 states and 118280 transitions. [2022-07-13 13:16:05,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 97.6) internal successors, (976), 9 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:05,595 INFO L276 IsEmpty]: Start isEmpty. Operand 109135 states and 118280 transitions. [2022-07-13 13:16:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-07-13 13:16:05,603 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:05,604 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:16:05,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 13:16:05,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 13:16:05,805 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:05,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:05,805 INFO L85 PathProgramCache]: Analyzing trace with hash 174057188, now seen corresponding path program 1 times [2022-07-13 13:16:05,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:05,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843382226] [2022-07-13 13:16:05,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:05,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 547 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-13 13:16:05,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:05,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843382226] [2022-07-13 13:16:05,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843382226] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:16:05,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:16:05,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:16:05,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007073885] [2022-07-13 13:16:05,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:16:05,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:16:05,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:05,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:16:05,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:16:05,995 INFO L87 Difference]: Start difference. First operand 109135 states and 118280 transitions. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:08,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:08,324 INFO L93 Difference]: Finished difference Result 235748 states and 255627 transitions. [2022-07-13 13:16:08,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:16:08,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 539 [2022-07-13 13:16:08,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:08,463 INFO L225 Difference]: With dead ends: 235748 [2022-07-13 13:16:08,463 INFO L226 Difference]: Without dead ends: 127040 [2022-07-13 13:16:08,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:16:08,496 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 320 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:08,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 696 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 13:16:08,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127040 states. [2022-07-13 13:16:09,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127040 to 121481. [2022-07-13 13:16:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121481 states, 121480 states have (on average 1.0836022390516957) internal successors, (131636), 121480 states have internal predecessors, (131636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:09,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121481 states to 121481 states and 131636 transitions. [2022-07-13 13:16:09,960 INFO L78 Accepts]: Start accepts. Automaton has 121481 states and 131636 transitions. Word has length 539 [2022-07-13 13:16:09,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:09,960 INFO L495 AbstractCegarLoop]: Abstraction has 121481 states and 131636 transitions. [2022-07-13 13:16:09,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:09,960 INFO L276 IsEmpty]: Start isEmpty. Operand 121481 states and 131636 transitions. [2022-07-13 13:16:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2022-07-13 13:16:09,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:09,969 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:16:09,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 13:16:09,969 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:09,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:09,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1738542916, now seen corresponding path program 1 times [2022-07-13 13:16:09,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:09,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663900964] [2022-07-13 13:16:09,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:09,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 558 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-13 13:16:10,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:10,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663900964] [2022-07-13 13:16:10,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663900964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:16:10,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:16:10,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:16:10,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307670409] [2022-07-13 13:16:10,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:16:10,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:16:10,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:10,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:16:10,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:16:10,134 INFO L87 Difference]: Start difference. First operand 121481 states and 131636 transitions. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:12,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:12,344 INFO L93 Difference]: Finished difference Result 254037 states and 275167 transitions. [2022-07-13 13:16:12,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:16:12,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 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 552 [2022-07-13 13:16:12,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:12,492 INFO L225 Difference]: With dead ends: 254037 [2022-07-13 13:16:12,492 INFO L226 Difference]: Without dead ends: 133408 [2022-07-13 13:16:12,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:16:12,538 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 341 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:12,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 294 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:16:12,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133408 states. [2022-07-13 13:16:13,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133408 to 127434. [2022-07-13 13:16:13,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127434 states, 127433 states have (on average 1.076094889078967) internal successors, (137130), 127433 states have internal predecessors, (137130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127434 states to 127434 states and 137130 transitions. [2022-07-13 13:16:14,281 INFO L78 Accepts]: Start accepts. Automaton has 127434 states and 137130 transitions. Word has length 552 [2022-07-13 13:16:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:14,281 INFO L495 AbstractCegarLoop]: Abstraction has 127434 states and 137130 transitions. [2022-07-13 13:16:14,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 127434 states and 137130 transitions. [2022-07-13 13:16:14,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2022-07-13 13:16:14,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:14,296 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:16:14,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 13:16:14,296 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:14,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1797037899, now seen corresponding path program 1 times [2022-07-13 13:16:14,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:14,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780380478] [2022-07-13 13:16:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:14,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 605 proven. 0 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2022-07-13 13:16:14,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:14,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780380478] [2022-07-13 13:16:14,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780380478] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:16:14,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:16:14,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:16:14,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756575508] [2022-07-13 13:16:14,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:16:14,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:16:14,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:14,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:16:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:16:14,487 INFO L87 Difference]: Start difference. First operand 127434 states and 137130 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 2 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:15,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:15,848 INFO L93 Difference]: Finished difference Result 250172 states and 269070 transitions. [2022-07-13 13:16:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:16:15,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 2 states have internal predecessors, (342), 0 states have call successors, (0), 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 733 [2022-07-13 13:16:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:15,991 INFO L225 Difference]: With dead ends: 250172 [2022-07-13 13:16:15,991 INFO L226 Difference]: Without dead ends: 123589 [2022-07-13 13:16:16,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:16:16,044 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 624 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:16,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 104 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 13:16:16,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123589 states. [2022-07-13 13:16:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123589 to 122297. [2022-07-13 13:16:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122297 states, 122296 states have (on average 1.074434159743573) internal successors, (131399), 122296 states have internal predecessors, (131399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122297 states to 122297 states and 131399 transitions. [2022-07-13 13:16:17,649 INFO L78 Accepts]: Start accepts. Automaton has 122297 states and 131399 transitions. Word has length 733 [2022-07-13 13:16:17,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:17,650 INFO L495 AbstractCegarLoop]: Abstraction has 122297 states and 131399 transitions. [2022-07-13 13:16:17,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 2 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:17,650 INFO L276 IsEmpty]: Start isEmpty. Operand 122297 states and 131399 transitions. [2022-07-13 13:16:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2022-07-13 13:16:17,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:17,666 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:16:17,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 13:16:17,666 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:17,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:17,667 INFO L85 PathProgramCache]: Analyzing trace with hash 537587988, now seen corresponding path program 1 times [2022-07-13 13:16:17,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:17,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385969311] [2022-07-13 13:16:17,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:17,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 1044 proven. 120 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-13 13:16:18,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:18,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385969311] [2022-07-13 13:16:18,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385969311] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:16:18,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670301566] [2022-07-13 13:16:18,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:18,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:16:18,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:16:18,173 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:16:18,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 13:16:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:18,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 13:16:18,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:16:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 1044 proven. 120 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-13 13:16:18,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:16:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 934 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-07-13 13:16:19,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670301566] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 13:16:19,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 13:16:19,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-07-13 13:16:19,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000424475] [2022-07-13 13:16:19,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:16:19,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:16:19,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:19,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:16:19,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:16:19,149 INFO L87 Difference]: Start difference. First operand 122297 states and 131399 transitions. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:21,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:21,139 INFO L93 Difference]: Finished difference Result 243718 states and 261919 transitions. [2022-07-13 13:16:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:16:21,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 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 747 [2022-07-13 13:16:21,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:21,284 INFO L225 Difference]: With dead ends: 243718 [2022-07-13 13:16:21,284 INFO L226 Difference]: Without dead ends: 121848 [2022-07-13 13:16:21,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1496 GetRequests, 1491 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:16:21,349 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 336 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:21,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 315 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 13:16:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121848 states. [2022-07-13 13:16:22,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121848 to 119714. [2022-07-13 13:16:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119714 states, 119713 states have (on average 1.0599015979885225) internal successors, (126884), 119713 states have internal predecessors, (126884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:22,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119714 states to 119714 states and 126884 transitions. [2022-07-13 13:16:22,864 INFO L78 Accepts]: Start accepts. Automaton has 119714 states and 126884 transitions. Word has length 747 [2022-07-13 13:16:22,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:22,864 INFO L495 AbstractCegarLoop]: Abstraction has 119714 states and 126884 transitions. [2022-07-13 13:16:22,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:22,864 INFO L276 IsEmpty]: Start isEmpty. Operand 119714 states and 126884 transitions. [2022-07-13 13:16:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2022-07-13 13:16:22,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:22,877 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:16:22,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 13:16:23,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:16:23,078 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:23,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:23,079 INFO L85 PathProgramCache]: Analyzing trace with hash -113660397, now seen corresponding path program 1 times [2022-07-13 13:16:23,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:23,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897420419] [2022-07-13 13:16:23,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:23,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 1034 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2022-07-13 13:16:23,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:23,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897420419] [2022-07-13 13:16:23,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897420419] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:16:23,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:16:23,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:16:23,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844541946] [2022-07-13 13:16:23,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:16:23,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:16:23,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:23,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:16:23,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:16:23,343 INFO L87 Difference]: Start difference. First operand 119714 states and 126884 transitions. Second operand has 4 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:26,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:26,859 INFO L93 Difference]: Finished difference Result 284144 states and 301049 transitions. [2022-07-13 13:16:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:16:26,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 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 754 [2022-07-13 13:16:26,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:27,032 INFO L225 Difference]: With dead ends: 284144 [2022-07-13 13:16:27,032 INFO L226 Difference]: Without dead ends: 163582 [2022-07-13 13:16:27,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:16:27,064 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 658 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 2762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:27,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 192 Invalid, 2762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 2357 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-13 13:16:27,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163582 states. [2022-07-13 13:16:28,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163582 to 146131. [2022-07-13 13:16:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146131 states, 146130 states have (on average 1.0597892287689044) internal successors, (154867), 146130 states have internal predecessors, (154867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146131 states to 146131 states and 154867 transitions. [2022-07-13 13:16:28,809 INFO L78 Accepts]: Start accepts. Automaton has 146131 states and 154867 transitions. Word has length 754 [2022-07-13 13:16:28,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:28,809 INFO L495 AbstractCegarLoop]: Abstraction has 146131 states and 154867 transitions. [2022-07-13 13:16:28,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:28,809 INFO L276 IsEmpty]: Start isEmpty. Operand 146131 states and 154867 transitions. [2022-07-13 13:16:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2022-07-13 13:16:28,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:28,823 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:16:28,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 13:16:28,823 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:28,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:28,824 INFO L85 PathProgramCache]: Analyzing trace with hash 121542871, now seen corresponding path program 1 times [2022-07-13 13:16:28,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:28,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780723940] [2022-07-13 13:16:28,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:28,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1077 backedges. 626 proven. 430 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 13:16:29,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:29,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780723940] [2022-07-13 13:16:29,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780723940] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:16:29,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519004951] [2022-07-13 13:16:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:29,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:16:29,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:16:29,193 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:16:29,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 13:16:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:29,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 13:16:29,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:16:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1077 backedges. 872 proven. 103 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-13 13:16:36,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:16:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1077 backedges. 872 proven. 103 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-13 13:16:38,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519004951] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 13:16:38,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 13:16:38,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-07-13 13:16:38,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769201540] [2022-07-13 13:16:38,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 13:16:38,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 13:16:38,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:38,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 13:16:38,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-13 13:16:38,235 INFO L87 Difference]: Start difference. First operand 146131 states and 154867 transitions. Second operand has 10 states, 10 states have (on average 162.9) internal successors, (1629), 10 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:45,078 INFO L93 Difference]: Finished difference Result 325358 states and 343887 transitions. [2022-07-13 13:16:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 13:16:45,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 162.9) internal successors, (1629), 10 states have internal predecessors, (1629), 0 states have call successors, (0), 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 776 [2022-07-13 13:16:45,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:45,294 INFO L225 Difference]: With dead ends: 325358 [2022-07-13 13:16:45,294 INFO L226 Difference]: Without dead ends: 179654 [2022-07-13 13:16:45,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1559 GetRequests, 1549 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-07-13 13:16:45,393 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 3565 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 6092 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3565 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 8682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 6092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1998 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:45,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3565 Valid, 402 Invalid, 8682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 6092 Invalid, 0 Unknown, 1998 Unchecked, 5.8s Time] [2022-07-13 13:16:45,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179654 states.