./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label02.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash adb370abe9a266817aee227dfaf2ff5e2cfdcfe49f97cfc66a125d7a6f5fbb19 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 12:51:18,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:51:18,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:51:18,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 12:51:18,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 12:51:18,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 12:51:18,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 12:51:18,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 12:51:18,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 12:51:18,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 12:51:18,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 12:51:18,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 12:51:18,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:51:18,873 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:51:18,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:51:18,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:51:18,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:51:18,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:51:18,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:51:18,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:51:18,881 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:51:18,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:51:18,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:51:18,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:51:18,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:51:18,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 12:51:18,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 12:51:18,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 12:51:18,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 12:51:18,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 12:51:18,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 12:51:18,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 12:51:18,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 12:51:18,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 12:51:18,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 12:51:18,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 12:51:18,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 12:51:18,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 12:51:18,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 12:51:18,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 12:51:18,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 12:51:18,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 12:51:18,910 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 12:51:18,939 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:51:18,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:51:18,939 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:51:18,939 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:51:18,940 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 12:51:18,940 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 12:51:18,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:51:18,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:51:18,941 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:51:18,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:51:18,941 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:51:18,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:51:18,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:51:18,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:51:18,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 12:51:18,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 12:51:18,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 12:51:18,942 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:51:18,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:51:18,942 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:51:18,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 12:51:18,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:51:18,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:51:18,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 12:51:18,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:51:18,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:51:18,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 12:51:18,944 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 12:51:18,944 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:51:18,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 12:51:18,944 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 12:51:18,944 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 12:51:18,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 12:51:18,945 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adb370abe9a266817aee227dfaf2ff5e2cfdcfe49f97cfc66a125d7a6f5fbb19 [2022-07-22 12:51:19,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:51:19,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:51:19,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:51:19,123 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:51:19,123 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:51:19,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label02.c [2022-07-22 12:51:19,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91f729bfe/3e05ca9e7ace416b8332319926ecffc9/FLAG295ad0780 [2022-07-22 12:51:19,647 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 12:51:19,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label02.c [2022-07-22 12:51:19,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91f729bfe/3e05ca9e7ace416b8332319926ecffc9/FLAG295ad0780 [2022-07-22 12:51:19,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91f729bfe/3e05ca9e7ace416b8332319926ecffc9 [2022-07-22 12:51:19,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:51:19,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 12:51:19,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:51:19,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:51:19,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:51:19,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:51:19" (1/1) ... [2022-07-22 12:51:19,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@459d6318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:19, skipping insertion in model container [2022-07-22 12:51:19,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:51:19" (1/1) ... [2022-07-22 12:51:19,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:51:19,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:51:19,914 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_label02.c[7859,7872] [2022-07-22 12:51:20,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:51:20,362 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:51:20,386 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_label02.c[7859,7872] [2022-07-22 12:51:20,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:51:20,551 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:51:20,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:20 WrapperNode [2022-07-22 12:51:20,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:51:20,552 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:51:20,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:51:20,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:51:20,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:20" (1/1) ... [2022-07-22 12:51:20,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:20" (1/1) ... [2022-07-22 12:51:20,814 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-22 12:51:20,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:51:20,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:51:20,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:51:20,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:51:20,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:20" (1/1) ... [2022-07-22 12:51:20,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:20" (1/1) ... [2022-07-22 12:51:20,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:20" (1/1) ... [2022-07-22 12:51:20,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:20" (1/1) ... [2022-07-22 12:51:20,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:20" (1/1) ... [2022-07-22 12:51:20,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:20" (1/1) ... [2022-07-22 12:51:21,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:20" (1/1) ... [2022-07-22 12:51:21,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:51:21,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:51:21,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:51:21,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:51:21,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:20" (1/1) ... [2022-07-22 12:51:21,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:51:21,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:51:21,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 12:51:21,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 12:51:21,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:51:21,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:51:21,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:51:21,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:51:21,170 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:51:21,171 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:51:23,548 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:51:23,564 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:51:23,566 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 12:51:23,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:51:23 BoogieIcfgContainer [2022-07-22 12:51:23,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:51:23,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 12:51:23,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 12:51:23,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 12:51:23,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:51:19" (1/3) ... [2022-07-22 12:51:23,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f07aa13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:51:23, skipping insertion in model container [2022-07-22 12:51:23,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:20" (2/3) ... [2022-07-22 12:51:23,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f07aa13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:51:23, skipping insertion in model container [2022-07-22 12:51:23,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:51:23" (3/3) ... [2022-07-22 12:51:23,576 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label02.c [2022-07-22 12:51:23,586 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 12:51:23,586 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 12:51:23,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 12:51:23,651 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@46d1a9da, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@259b31aa [2022-07-22 12:51:23,652 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 12:51:23,657 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) [2022-07-22 12:51:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-22 12:51:23,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:23,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:51:23,665 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:23,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:23,671 INFO L85 PathProgramCache]: Analyzing trace with hash -92557335, now seen corresponding path program 1 times [2022-07-22 12:51:23,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:23,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752965657] [2022-07-22 12:51:23,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:23,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:51:23,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:23,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752965657] [2022-07-22 12:51:23,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752965657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:23,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:23,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:51:23,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878000289] [2022-07-22 12:51:23,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:23,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:23,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:23,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:23,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:23,968 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 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:26,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:26,098 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2022-07-22 12:51:26,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:51:26,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-07-22 12:51:26,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:26,133 INFO L225 Difference]: With dead ends: 1644 [2022-07-22 12:51:26,133 INFO L226 Difference]: Without dead ends: 977 [2022-07-22 12:51:26,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:26,139 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 435 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 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, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:26,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 12:51:26,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-07-22 12:51:26,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2022-07-22 12:51:26,295 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) [2022-07-22 12:51:26,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2022-07-22 12:51:26,301 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 53 [2022-07-22 12:51:26,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:26,301 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2022-07-22 12:51:26,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:26,302 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2022-07-22 12:51:26,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-22 12:51:26,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:26,309 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:51:26,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 12:51:26,318 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:26,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:26,319 INFO L85 PathProgramCache]: Analyzing trace with hash -10640398, now seen corresponding path program 1 times [2022-07-22 12:51:26,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:26,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13177431] [2022-07-22 12:51:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:26,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:51:26,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:26,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13177431] [2022-07-22 12:51:26,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13177431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:26,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:26,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:51:26,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140638880] [2022-07-22 12:51:26,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:26,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:26,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:26,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:26,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:26,423 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:28,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:28,262 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2022-07-22 12:51:28,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:51:28,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-22 12:51:28,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:28,268 INFO L225 Difference]: With dead ends: 2813 [2022-07-22 12:51:28,268 INFO L226 Difference]: Without dead ends: 1844 [2022-07-22 12:51:28,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:28,272 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:28,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 12:51:28,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-07-22 12:51:28,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2022-07-22 12:51:28,319 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) [2022-07-22 12:51:28,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2022-07-22 12:51:28,324 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 120 [2022-07-22 12:51:28,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:28,326 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2022-07-22 12:51:28,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2022-07-22 12:51:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-22 12:51:28,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:28,331 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:51:28,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 12:51:28,332 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:28,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:28,333 INFO L85 PathProgramCache]: Analyzing trace with hash -703297284, now seen corresponding path program 1 times [2022-07-22 12:51:28,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:28,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009960145] [2022-07-22 12:51:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:28,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:51:28,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:28,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009960145] [2022-07-22 12:51:28,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009960145] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:28,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:28,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:51:28,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871521730] [2022-07-22 12:51:28,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:28,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:51:28,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:28,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:51:28,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:51:28,560 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:31,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:31,685 INFO L93 Difference]: Finished difference Result 6765 states and 9258 transitions. [2022-07-22 12:51:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:51:31,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2022-07-22 12:51:31,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:31,699 INFO L225 Difference]: With dead ends: 6765 [2022-07-22 12:51:31,700 INFO L226 Difference]: Without dead ends: 4926 [2022-07-22 12:51:31,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:51:31,710 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 860 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 3384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:31,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 329 Invalid, 3384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-22 12:51:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4926 states. [2022-07-22 12:51:31,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4926 to 4875. [2022-07-22 12:51:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4875 states, 4874 states have (on average 1.286417726713172) internal successors, (6270), 4874 states have internal predecessors, (6270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 6270 transitions. [2022-07-22 12:51:31,817 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 6270 transitions. Word has length 123 [2022-07-22 12:51:31,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:31,819 INFO L495 AbstractCegarLoop]: Abstraction has 4875 states and 6270 transitions. [2022-07-22 12:51:31,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:31,819 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 6270 transitions. [2022-07-22 12:51:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-07-22 12:51:31,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:31,821 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:51:31,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 12:51:31,822 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:31,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:31,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1839715273, now seen corresponding path program 1 times [2022-07-22 12:51:31,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:31,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063641111] [2022-07-22 12:51:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:31,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-22 12:51:31,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:31,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063641111] [2022-07-22 12:51:31,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063641111] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:31,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:31,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:51:31,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251550777] [2022-07-22 12:51:31,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:31,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:31,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:31,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:31,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:31,948 INFO L87 Difference]: Start difference. First operand 4875 states and 6270 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:33,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:33,496 INFO L93 Difference]: Finished difference Result 14436 states and 18541 transitions. [2022-07-22 12:51:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:51:33,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 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 194 [2022-07-22 12:51:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:33,515 INFO L225 Difference]: With dead ends: 14436 [2022-07-22 12:51:33,515 INFO L226 Difference]: Without dead ends: 8277 [2022-07-22 12:51:33,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:33,522 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:33,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 590 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 12:51:33,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2022-07-22 12:51:33,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 6147. [2022-07-22 12:51:33,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6147 states, 6146 states have (on average 1.1906931337455255) internal successors, (7318), 6146 states have internal predecessors, (7318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6147 states to 6147 states and 7318 transitions. [2022-07-22 12:51:33,600 INFO L78 Accepts]: Start accepts. Automaton has 6147 states and 7318 transitions. Word has length 194 [2022-07-22 12:51:33,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:33,600 INFO L495 AbstractCegarLoop]: Abstraction has 6147 states and 7318 transitions. [2022-07-22 12:51:33,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand 6147 states and 7318 transitions. [2022-07-22 12:51:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-07-22 12:51:33,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:33,602 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:51:33,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 12:51:33,603 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:33,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:33,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1977125269, now seen corresponding path program 1 times [2022-07-22 12:51:33,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:33,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989498759] [2022-07-22 12:51:33,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:33,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-22 12:51:33,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:33,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989498759] [2022-07-22 12:51:33,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989498759] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:33,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:33,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:51:33,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353377774] [2022-07-22 12:51:33,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:33,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:33,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:33,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:33,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:33,697 INFO L87 Difference]: Start difference. First operand 6147 states and 7318 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:35,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:35,367 INFO L93 Difference]: Finished difference Result 15692 states and 18897 transitions. [2022-07-22 12:51:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:51:35,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 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 207 [2022-07-22 12:51:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:35,389 INFO L225 Difference]: With dead ends: 15692 [2022-07-22 12:51:35,389 INFO L226 Difference]: Without dead ends: 9547 [2022-07-22 12:51:35,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:35,397 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 407 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:35,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 477 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 12:51:35,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9547 states. [2022-07-22 12:51:35,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9547 to 6124. [2022-07-22 12:51:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6124 states, 6123 states have (on average 1.1894496162012085) internal successors, (7283), 6123 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6124 states to 6124 states and 7283 transitions. [2022-07-22 12:51:35,502 INFO L78 Accepts]: Start accepts. Automaton has 6124 states and 7283 transitions. Word has length 207 [2022-07-22 12:51:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:35,503 INFO L495 AbstractCegarLoop]: Abstraction has 6124 states and 7283 transitions. [2022-07-22 12:51:35,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:35,506 INFO L276 IsEmpty]: Start isEmpty. Operand 6124 states and 7283 transitions. [2022-07-22 12:51:35,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-07-22 12:51:35,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:35,509 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2022-07-22 12:51:35,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 12:51:35,509 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:35,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:35,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1027746944, now seen corresponding path program 1 times [2022-07-22 12:51:35,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:35,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578086045] [2022-07-22 12:51:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:35,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:51:35,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:35,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578086045] [2022-07-22 12:51:35,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578086045] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:35,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:35,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 12:51:35,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560824269] [2022-07-22 12:51:35,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:35,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 12:51:35,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:35,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 12:51:35,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:51:35,638 INFO L87 Difference]: Start difference. First operand 6124 states and 7283 transitions. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:37,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:37,895 INFO L93 Difference]: Finished difference Result 16114 states and 19480 transitions. [2022-07-22 12:51:37,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:51:37,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 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 214 [2022-07-22 12:51:37,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:37,929 INFO L225 Difference]: With dead ends: 16114 [2022-07-22 12:51:37,930 INFO L226 Difference]: Without dead ends: 9992 [2022-07-22 12:51:37,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:51:37,935 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 600 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2336 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 2894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 2336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:37,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 863 Invalid, 2894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 2336 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 12:51:37,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9992 states. [2022-07-22 12:51:38,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9992 to 9956. [2022-07-22 12:51:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9956 states, 9955 states have (on average 1.171672526368659) internal successors, (11664), 9955 states have internal predecessors, (11664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:38,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9956 states to 9956 states and 11664 transitions. [2022-07-22 12:51:38,063 INFO L78 Accepts]: Start accepts. Automaton has 9956 states and 11664 transitions. Word has length 214 [2022-07-22 12:51:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:38,064 INFO L495 AbstractCegarLoop]: Abstraction has 9956 states and 11664 transitions. [2022-07-22 12:51:38,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:38,064 INFO L276 IsEmpty]: Start isEmpty. Operand 9956 states and 11664 transitions. [2022-07-22 12:51:38,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-07-22 12:51:38,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:38,067 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-22 12:51:38,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 12:51:38,068 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:38,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:38,068 INFO L85 PathProgramCache]: Analyzing trace with hash 173331966, now seen corresponding path program 1 times [2022-07-22 12:51:38,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:38,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966468858] [2022-07-22 12:51:38,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:38,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 240 proven. 70 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-22 12:51:38,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:38,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966468858] [2022-07-22 12:51:38,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966468858] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:51:38,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002809108] [2022-07-22 12:51:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:38,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:51:38,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:51:38,227 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:51:38,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 12:51:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:38,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 12:51:38,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:51:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 240 proven. 70 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-22 12:51:38,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:51:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-22 12:51:38,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002809108] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 12:51:38,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 12:51:38,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-22 12:51:38,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952837580] [2022-07-22 12:51:38,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:38,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:51:38,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:38,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:51:38,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:51:38,949 INFO L87 Difference]: Start difference. First operand 9956 states and 11664 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:41,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:41,824 INFO L93 Difference]: Finished difference Result 30575 states and 36167 transitions. [2022-07-22 12:51:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:51:41,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 277 [2022-07-22 12:51:41,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:41,852 INFO L225 Difference]: With dead ends: 30575 [2022-07-22 12:51:41,852 INFO L226 Difference]: Without dead ends: 19763 [2022-07-22 12:51:41,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 549 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:51:41,862 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 890 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 3001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:41,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [890 Valid, 162 Invalid, 3001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [735 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 12:51:41,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19763 states. [2022-07-22 12:51:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19763 to 19760. [2022-07-22 12:51:42,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19760 states, 19759 states have (on average 1.1599777316665822) internal successors, (22920), 19759 states have internal predecessors, (22920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19760 states to 19760 states and 22920 transitions. [2022-07-22 12:51:42,071 INFO L78 Accepts]: Start accepts. Automaton has 19760 states and 22920 transitions. Word has length 277 [2022-07-22 12:51:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:42,071 INFO L495 AbstractCegarLoop]: Abstraction has 19760 states and 22920 transitions. [2022-07-22 12:51:42,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:42,072 INFO L276 IsEmpty]: Start isEmpty. Operand 19760 states and 22920 transitions. [2022-07-22 12:51:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-07-22 12:51:42,075 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:42,075 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-22 12:51:42,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 12:51:42,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:51:42,296 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:42,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:42,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1525566454, now seen corresponding path program 1 times [2022-07-22 12:51:42,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:42,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919017004] [2022-07-22 12:51:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:42,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-22 12:51:42,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:42,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919017004] [2022-07-22 12:51:42,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919017004] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:42,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:42,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:51:42,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734317200] [2022-07-22 12:51:42,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:42,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:42,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:42,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:42,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:42,393 INFO L87 Difference]: Start difference. First operand 19760 states and 22920 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:44,168 INFO L93 Difference]: Finished difference Result 42909 states and 49989 transitions. [2022-07-22 12:51:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:51:44,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 290 [2022-07-22 12:51:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:44,200 INFO L225 Difference]: With dead ends: 42909 [2022-07-22 12:51:44,200 INFO L226 Difference]: Without dead ends: 23151 [2022-07-22 12:51:44,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:44,211 INFO L413 NwaCegarLoop]: 826 mSDtfsCounter, 374 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:44,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 896 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 12:51:44,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23151 states. [2022-07-22 12:51:44,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23151 to 22725. [2022-07-22 12:51:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22725 states, 22724 states have (on average 1.1456169688435134) internal successors, (26033), 22724 states have internal predecessors, (26033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:44,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22725 states to 22725 states and 26033 transitions. [2022-07-22 12:51:44,427 INFO L78 Accepts]: Start accepts. Automaton has 22725 states and 26033 transitions. Word has length 290 [2022-07-22 12:51:44,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:44,429 INFO L495 AbstractCegarLoop]: Abstraction has 22725 states and 26033 transitions. [2022-07-22 12:51:44,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand 22725 states and 26033 transitions. [2022-07-22 12:51:44,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-07-22 12:51:44,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:44,433 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:51:44,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 12:51:44,434 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:44,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:44,434 INFO L85 PathProgramCache]: Analyzing trace with hash -162552321, now seen corresponding path program 1 times [2022-07-22 12:51:44,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:44,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566102925] [2022-07-22 12:51:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:44,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 12:51:44,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:44,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566102925] [2022-07-22 12:51:44,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566102925] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:44,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:44,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:51:44,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598634588] [2022-07-22 12:51:44,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:44,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:51:44,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:44,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:51:44,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:51:44,550 INFO L87 Difference]: Start difference. First operand 22725 states and 26033 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:47,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:47,920 INFO L93 Difference]: Finished difference Result 64237 states and 73654 transitions. [2022-07-22 12:51:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:51:47,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 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 313 [2022-07-22 12:51:47,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:47,963 INFO L225 Difference]: With dead ends: 64237 [2022-07-22 12:51:47,964 INFO L226 Difference]: Without dead ends: 38101 [2022-07-22 12:51:47,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:51:47,984 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 854 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 2908 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 3378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 2908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:47,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [854 Valid, 371 Invalid, 3378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 2908 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 12:51:48,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38101 states. [2022-07-22 12:51:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38101 to 37204. [2022-07-22 12:51:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37204 states, 37203 states have (on average 1.137462032631777) internal successors, (42317), 37203 states have internal predecessors, (42317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37204 states to 37204 states and 42317 transitions. [2022-07-22 12:51:48,351 INFO L78 Accepts]: Start accepts. Automaton has 37204 states and 42317 transitions. Word has length 313 [2022-07-22 12:51:48,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:48,352 INFO L495 AbstractCegarLoop]: Abstraction has 37204 states and 42317 transitions. [2022-07-22 12:51:48,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:48,352 INFO L276 IsEmpty]: Start isEmpty. Operand 37204 states and 42317 transitions. [2022-07-22 12:51:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-07-22 12:51:48,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:48,358 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:51:48,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 12:51:48,358 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:48,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:48,359 INFO L85 PathProgramCache]: Analyzing trace with hash -769673228, now seen corresponding path program 1 times [2022-07-22 12:51:48,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:48,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183757782] [2022-07-22 12:51:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:48,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-22 12:51:48,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:48,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183757782] [2022-07-22 12:51:48,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183757782] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:48,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:48,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:51:48,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803787785] [2022-07-22 12:51:48,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:48,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:48,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:48,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:48,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:48,464 INFO L87 Difference]: Start difference. First operand 37204 states and 42317 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:50,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:50,201 INFO L93 Difference]: Finished difference Result 90182 states and 102746 transitions. [2022-07-22 12:51:50,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:51:50,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 328 [2022-07-22 12:51:50,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:50,255 INFO L225 Difference]: With dead ends: 90182 [2022-07-22 12:51:50,255 INFO L226 Difference]: Without dead ends: 51278 [2022-07-22 12:51:50,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:50,277 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 363 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:50,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 824 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 12:51:50,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51278 states. [2022-07-22 12:51:50,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51278 to 49991. [2022-07-22 12:51:50,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49991 states, 49990 states have (on average 1.1124624924984996) internal successors, (55612), 49990 states have internal predecessors, (55612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49991 states to 49991 states and 55612 transitions. [2022-07-22 12:51:50,787 INFO L78 Accepts]: Start accepts. Automaton has 49991 states and 55612 transitions. Word has length 328 [2022-07-22 12:51:50,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:50,788 INFO L495 AbstractCegarLoop]: Abstraction has 49991 states and 55612 transitions. [2022-07-22 12:51:50,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:50,788 INFO L276 IsEmpty]: Start isEmpty. Operand 49991 states and 55612 transitions. [2022-07-22 12:51:50,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-07-22 12:51:50,792 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:50,792 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:51:50,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 12:51:50,793 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:50,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1314932159, now seen corresponding path program 1 times [2022-07-22 12:51:50,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:50,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21305002] [2022-07-22 12:51:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:50,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 361 proven. 214 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-22 12:51:50,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:50,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21305002] [2022-07-22 12:51:50,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21305002] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:51:50,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188313041] [2022-07-22 12:51:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:50,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:51:50,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:51:50,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:51:50,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 12:51:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:51,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 12:51:51,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:51:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 381 proven. 73 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-07-22 12:51:51,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:51:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 454 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-07-22 12:51:51,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188313041] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 12:51:51,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 12:51:51,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2022-07-22 12:51:51,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452359495] [2022-07-22 12:51:51,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:51,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:51:51,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:51,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:51:51,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:51:51,663 INFO L87 Difference]: Start difference. First operand 49991 states and 55612 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:54,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:54,674 INFO L93 Difference]: Finished difference Result 118728 states and 132318 transitions. [2022-07-22 12:51:54,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:51:54,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 351 [2022-07-22 12:51:54,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:54,747 INFO L225 Difference]: With dead ends: 118728 [2022-07-22 12:51:54,748 INFO L226 Difference]: Without dead ends: 68739 [2022-07-22 12:51:54,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 697 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:51:54,781 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 923 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 2991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:54,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 182 Invalid, 2991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 2317 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:51:54,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68739 states. [2022-07-22 12:51:55,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68739 to 64908. [2022-07-22 12:51:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64908 states, 64907 states have (on average 1.1170597932426394) internal successors, (72505), 64907 states have internal predecessors, (72505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64908 states to 64908 states and 72505 transitions. [2022-07-22 12:51:55,546 INFO L78 Accepts]: Start accepts. Automaton has 64908 states and 72505 transitions. Word has length 351 [2022-07-22 12:51:55,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:55,547 INFO L495 AbstractCegarLoop]: Abstraction has 64908 states and 72505 transitions. [2022-07-22 12:51:55,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:55,547 INFO L276 IsEmpty]: Start isEmpty. Operand 64908 states and 72505 transitions. [2022-07-22 12:51:55,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-07-22 12:51:55,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:55,551 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:51:55,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 12:51:55,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 12:51:55,788 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:55,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:55,789 INFO L85 PathProgramCache]: Analyzing trace with hash -444093731, now seen corresponding path program 1 times [2022-07-22 12:51:55,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:55,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421240576] [2022-07-22 12:51:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:55,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-22 12:51:56,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:56,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421240576] [2022-07-22 12:51:56,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421240576] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:56,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:56,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:51:56,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671637167] [2022-07-22 12:51:56,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:56,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:56,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:56,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:56,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:56,124 INFO L87 Difference]: Start difference. First operand 64908 states and 72505 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:58,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:58,076 INFO L93 Difference]: Finished difference Result 142175 states and 159014 transitions. [2022-07-22 12:51:58,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:51:58,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 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 365 [2022-07-22 12:51:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:58,160 INFO L225 Difference]: With dead ends: 142175 [2022-07-22 12:51:58,161 INFO L226 Difference]: Without dead ends: 76833 [2022-07-22 12:51:58,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:58,181 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 470 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:58,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 301 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 12:51:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76833 states. [2022-07-22 12:51:58,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76833 to 73419. [2022-07-22 12:51:58,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73419 states, 73418 states have (on average 1.1121250919393064) internal successors, (81650), 73418 states have internal predecessors, (81650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73419 states to 73419 states and 81650 transitions. [2022-07-22 12:51:59,030 INFO L78 Accepts]: Start accepts. Automaton has 73419 states and 81650 transitions. Word has length 365 [2022-07-22 12:51:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:59,031 INFO L495 AbstractCegarLoop]: Abstraction has 73419 states and 81650 transitions. [2022-07-22 12:51:59,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:59,031 INFO L276 IsEmpty]: Start isEmpty. Operand 73419 states and 81650 transitions. [2022-07-22 12:51:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-07-22 12:51:59,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:59,063 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:51:59,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 12:51:59,064 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:59,064 INFO L85 PathProgramCache]: Analyzing trace with hash -2004060531, now seen corresponding path program 1 times [2022-07-22 12:51:59,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:59,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665034799] [2022-07-22 12:51:59,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:59,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 414 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-07-22 12:51:59,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:59,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665034799] [2022-07-22 12:51:59,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665034799] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:59,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:59,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:51:59,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806183842] [2022-07-22 12:51:59,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:59,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:59,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:59,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:59,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:59,300 INFO L87 Difference]: Start difference. First operand 73419 states and 81650 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:01,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:01,206 INFO L93 Difference]: Finished difference Result 163003 states and 181528 transitions. [2022-07-22 12:52:01,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:01,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 381 [2022-07-22 12:52:01,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:01,306 INFO L225 Difference]: With dead ends: 163003 [2022-07-22 12:52:01,306 INFO L226 Difference]: Without dead ends: 88309 [2022-07-22 12:52:01,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:01,411 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 388 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:01,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 819 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 12:52:01,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88309 states. [2022-07-22 12:52:02,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88309 to 72958. [2022-07-22 12:52:02,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72958 states, 72957 states have (on average 1.110955768466357) internal successors, (81052), 72957 states have internal predecessors, (81052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72958 states to 72958 states and 81052 transitions. [2022-07-22 12:52:02,406 INFO L78 Accepts]: Start accepts. Automaton has 72958 states and 81052 transitions. Word has length 381 [2022-07-22 12:52:02,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:02,407 INFO L495 AbstractCegarLoop]: Abstraction has 72958 states and 81052 transitions. [2022-07-22 12:52:02,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 72958 states and 81052 transitions. [2022-07-22 12:52:02,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-07-22 12:52:02,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:02,413 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:02,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 12:52:02,413 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:02,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:02,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1666713624, now seen corresponding path program 1 times [2022-07-22 12:52:02,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:02,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278376881] [2022-07-22 12:52:02,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:02,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-22 12:52:02,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:02,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278376881] [2022-07-22 12:52:02,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278376881] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:02,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:02,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:52:02,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707303922] [2022-07-22 12:52:02,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:02,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:02,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:02,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:02,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:02,538 INFO L87 Difference]: Start difference. First operand 72958 states and 81052 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:04,315 INFO L93 Difference]: Finished difference Result 166355 states and 185074 transitions. [2022-07-22 12:52:04,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:04,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 399 [2022-07-22 12:52:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:04,422 INFO L225 Difference]: With dead ends: 166355 [2022-07-22 12:52:04,422 INFO L226 Difference]: Without dead ends: 92969 [2022-07-22 12:52:04,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:04,444 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 409 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:04,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 362 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 12:52:04,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92969 states. [2022-07-22 12:52:05,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92969 to 88271. [2022-07-22 12:52:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88271 states, 88270 states have (on average 1.1049280616290926) internal successors, (97532), 88270 states have internal predecessors, (97532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:05,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88271 states to 88271 states and 97532 transitions. [2022-07-22 12:52:05,496 INFO L78 Accepts]: Start accepts. Automaton has 88271 states and 97532 transitions. Word has length 399 [2022-07-22 12:52:05,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:05,497 INFO L495 AbstractCegarLoop]: Abstraction has 88271 states and 97532 transitions. [2022-07-22 12:52:05,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:05,497 INFO L276 IsEmpty]: Start isEmpty. Operand 88271 states and 97532 transitions. [2022-07-22 12:52:05,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-07-22 12:52:05,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:05,503 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:05,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 12:52:05,503 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:05,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:05,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1497264050, now seen corresponding path program 1 times [2022-07-22 12:52:05,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:05,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882559008] [2022-07-22 12:52:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:05,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 447 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-07-22 12:52:05,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:05,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882559008] [2022-07-22 12:52:05,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882559008] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:05,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:05,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:52:05,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977807925] [2022-07-22 12:52:05,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:05,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:05,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:05,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:05,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:05,787 INFO L87 Difference]: Start difference. First operand 88271 states and 97532 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:07,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:07,846 INFO L93 Difference]: Finished difference Result 185045 states and 204010 transitions. [2022-07-22 12:52:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:07,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 403 [2022-07-22 12:52:07,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:07,950 INFO L225 Difference]: With dead ends: 185045 [2022-07-22 12:52:07,951 INFO L226 Difference]: Without dead ends: 96775 [2022-07-22 12:52:07,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:07,972 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 388 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:07,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 315 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 12:52:08,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96775 states. [2022-07-22 12:52:08,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96775 to 91669. [2022-07-22 12:52:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91669 states, 91668 states have (on average 1.1009076231618449) internal successors, (100918), 91668 states have internal predecessors, (100918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91669 states to 91669 states and 100918 transitions. [2022-07-22 12:52:09,060 INFO L78 Accepts]: Start accepts. Automaton has 91669 states and 100918 transitions. Word has length 403 [2022-07-22 12:52:09,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:09,061 INFO L495 AbstractCegarLoop]: Abstraction has 91669 states and 100918 transitions. [2022-07-22 12:52:09,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 91669 states and 100918 transitions. [2022-07-22 12:52:09,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-07-22 12:52:09,068 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:09,069 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:09,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 12:52:09,069 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:09,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:09,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1444998463, now seen corresponding path program 1 times [2022-07-22 12:52:09,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:09,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987195527] [2022-07-22 12:52:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:09,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 367 proven. 51 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-22 12:52:09,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:09,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987195527] [2022-07-22 12:52:09,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987195527] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:52:09,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742675799] [2022-07-22 12:52:09,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:09,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:52:09,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:52:09,240 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:52:09,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 12:52:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:09,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 12:52:09,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:52:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 431 proven. 82 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-07-22 12:52:09,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:52:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 431 proven. 82 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-07-22 12:52:10,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742675799] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 12:52:10,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 12:52:10,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-07-22 12:52:10,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547497957] [2022-07-22 12:52:10,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 12:52:10,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 12:52:10,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:10,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 12:52:10,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:52:10,450 INFO L87 Difference]: Start difference. First operand 91669 states and 100918 transitions. Second operand has 9 states, 9 states have (on average 83.11111111111111) internal successors, (748), 9 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:20,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:20,468 INFO L93 Difference]: Finished difference Result 237420 states and 260035 transitions. [2022-07-22 12:52:20,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 12:52:20,468 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 83.11111111111111) internal successors, (748), 9 states have internal predecessors, (748), 0 states have call successors, (0), 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 433 [2022-07-22 12:52:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:20,647 INFO L225 Difference]: With dead ends: 237420 [2022-07-22 12:52:20,647 INFO L226 Difference]: Without dead ends: 139369 [2022-07-22 12:52:20,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 870 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2022-07-22 12:52:20,710 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 8869 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 8880 mSolverCounterSat, 3020 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8869 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 11900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3020 IncrementalHoareTripleChecker+Valid, 8880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:20,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8869 Valid, 366 Invalid, 11900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3020 Valid, 8880 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-07-22 12:52:20,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139369 states. [2022-07-22 12:52:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139369 to 116301. [2022-07-22 12:52:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116301 states, 116300 states have (on average 1.0760705073086845) internal successors, (125147), 116300 states have internal predecessors, (125147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:22,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116301 states to 116301 states and 125147 transitions. [2022-07-22 12:52:22,342 INFO L78 Accepts]: Start accepts. Automaton has 116301 states and 125147 transitions. Word has length 433 [2022-07-22 12:52:22,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:22,342 INFO L495 AbstractCegarLoop]: Abstraction has 116301 states and 125147 transitions. [2022-07-22 12:52:22,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 83.11111111111111) internal successors, (748), 9 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:22,343 INFO L276 IsEmpty]: Start isEmpty. Operand 116301 states and 125147 transitions. [2022-07-22 12:52:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-07-22 12:52:22,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:22,351 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-22 12:52:22,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 12:52:22,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:52:22,565 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:22,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:22,565 INFO L85 PathProgramCache]: Analyzing trace with hash -273409696, now seen corresponding path program 1 times [2022-07-22 12:52:22,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:22,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158897695] [2022-07-22 12:52:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:22,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 473 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-07-22 12:52:23,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:23,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158897695] [2022-07-22 12:52:23,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158897695] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:23,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:23,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:52:23,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208310602] [2022-07-22 12:52:23,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:23,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:23,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:23,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:23,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:23,133 INFO L87 Difference]: Start difference. First operand 116301 states and 125147 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:25,343 INFO L93 Difference]: Finished difference Result 235578 states and 253447 transitions. [2022-07-22 12:52:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:25,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 498 [2022-07-22 12:52:25,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:25,487 INFO L225 Difference]: With dead ends: 235578 [2022-07-22 12:52:25,488 INFO L226 Difference]: Without dead ends: 119279 [2022-07-22 12:52:25,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:25,538 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 366 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:25,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 325 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 12:52:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119279 states. [2022-07-22 12:52:26,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119279 to 108205. [2022-07-22 12:52:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108205 states, 108204 states have (on average 1.0754593175853018) internal successors, (116369), 108204 states have internal predecessors, (116369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:26,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108205 states to 108205 states and 116369 transitions. [2022-07-22 12:52:26,936 INFO L78 Accepts]: Start accepts. Automaton has 108205 states and 116369 transitions. Word has length 498 [2022-07-22 12:52:26,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:26,936 INFO L495 AbstractCegarLoop]: Abstraction has 108205 states and 116369 transitions. [2022-07-22 12:52:26,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:26,936 INFO L276 IsEmpty]: Start isEmpty. Operand 108205 states and 116369 transitions. [2022-07-22 12:52:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-07-22 12:52:26,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:26,953 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:26,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 12:52:26,953 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:26,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:26,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1456772986, now seen corresponding path program 1 times [2022-07-22 12:52:26,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:26,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833563108] [2022-07-22 12:52:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:26,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 265 proven. 51 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-22 12:52:27,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:27,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833563108] [2022-07-22 12:52:27,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833563108] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:52:27,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445299357] [2022-07-22 12:52:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:27,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:52:27,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:52:27,486 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:52:27,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 12:52:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:27,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:52:27,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:52:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 265 proven. 51 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-22 12:52:28,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:52:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 265 proven. 51 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-22 12:52:29,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445299357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 12:52:29,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 12:52:29,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-22 12:52:29,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885787065] [2022-07-22 12:52:29,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 12:52:29,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 12:52:29,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:29,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 12:52:29,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:52:29,774 INFO L87 Difference]: Start difference. First operand 108205 states and 116369 transitions. Second operand has 8 states, 8 states have (on average 140.125) internal successors, (1121), 8 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:38,295 INFO L93 Difference]: Finished difference Result 260777 states and 279483 transitions. [2022-07-22 12:52:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 12:52:38,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 140.125) internal successors, (1121), 8 states have internal predecessors, (1121), 0 states have call successors, (0), 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 511 [2022-07-22 12:52:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:38,460 INFO L225 Difference]: With dead ends: 260777 [2022-07-22 12:52:38,460 INFO L226 Difference]: Without dead ends: 150394 [2022-07-22 12:52:38,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 1023 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-22 12:52:38,497 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 2113 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 7400 mSolverCounterSat, 1479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2113 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 9396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1479 IncrementalHoareTripleChecker+Valid, 7400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 517 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:38,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2113 Valid, 291 Invalid, 9396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1479 Valid, 7400 Invalid, 0 Unknown, 517 Unchecked, 7.4s Time] [2022-07-22 12:52:38,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150394 states. [2022-07-22 12:52:40,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150394 to 118839. [2022-07-22 12:52:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118839 states, 118838 states have (on average 1.0636244298961612) internal successors, (126399), 118838 states have internal predecessors, (126399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118839 states to 118839 states and 126399 transitions. [2022-07-22 12:52:40,238 INFO L78 Accepts]: Start accepts. Automaton has 118839 states and 126399 transitions. Word has length 511 [2022-07-22 12:52:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:40,239 INFO L495 AbstractCegarLoop]: Abstraction has 118839 states and 126399 transitions. [2022-07-22 12:52:40,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 140.125) internal successors, (1121), 8 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:40,239 INFO L276 IsEmpty]: Start isEmpty. Operand 118839 states and 126399 transitions. [2022-07-22 12:52:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2022-07-22 12:52:40,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:40,250 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:40,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 12:52:40,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 12:52:40,468 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:40,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:40,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2110531290, now seen corresponding path program 1 times [2022-07-22 12:52:40,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:40,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257054999] [2022-07-22 12:52:40,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:40,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 12:52:40,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:40,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257054999] [2022-07-22 12:52:40,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257054999] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:40,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:40,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:52:40,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944864053] [2022-07-22 12:52:40,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:40,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:40,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:40,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:40,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:40,650 INFO L87 Difference]: Start difference. First operand 118839 states and 126399 transitions. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:43,184 INFO L93 Difference]: Finished difference Result 248758 states and 264552 transitions. [2022-07-22 12:52:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:43,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 544 [2022-07-22 12:52:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:43,579 INFO L225 Difference]: With dead ends: 248758 [2022-07-22 12:52:43,579 INFO L226 Difference]: Without dead ends: 129921 [2022-07-22 12:52:43,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:43,630 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 408 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:43,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 271 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 12:52:43,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129921 states. [2022-07-22 12:52:44,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129921 to 128623. [2022-07-22 12:52:45,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128623 states, 128622 states have (on average 1.0617001757086657) internal successors, (136558), 128622 states have internal predecessors, (136558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:45,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128623 states to 128623 states and 136558 transitions. [2022-07-22 12:52:45,397 INFO L78 Accepts]: Start accepts. Automaton has 128623 states and 136558 transitions. Word has length 544 [2022-07-22 12:52:45,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:45,397 INFO L495 AbstractCegarLoop]: Abstraction has 128623 states and 136558 transitions. [2022-07-22 12:52:45,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:45,398 INFO L276 IsEmpty]: Start isEmpty. Operand 128623 states and 136558 transitions. [2022-07-22 12:52:45,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2022-07-22 12:52:45,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:45,413 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:45,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 12:52:45,413 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:45,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:45,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1550554275, now seen corresponding path program 1 times [2022-07-22 12:52:45,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:45,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435036125] [2022-07-22 12:52:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:45,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-07-22 12:52:45,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:45,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435036125] [2022-07-22 12:52:45,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435036125] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:45,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:45,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:52:45,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142317892] [2022-07-22 12:52:45,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:45,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:45,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:45,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:45,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:45,680 INFO L87 Difference]: Start difference. First operand 128623 states and 136558 transitions. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:47,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:47,699 INFO L93 Difference]: Finished difference Result 251702 states and 267146 transitions. [2022-07-22 12:52:47,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:47,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 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 577 [2022-07-22 12:52:47,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:47,870 INFO L225 Difference]: With dead ends: 251702 [2022-07-22 12:52:47,870 INFO L226 Difference]: Without dead ends: 123506 [2022-07-22 12:52:47,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:47,926 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 442 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:47,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 704 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 12:52:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123506 states. [2022-07-22 12:52:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123506 to 119245. [2022-07-22 12:52:49,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119245 states, 119244 states have (on average 1.052463855623763) internal successors, (125500), 119244 states have internal predecessors, (125500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:49,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119245 states to 119245 states and 125500 transitions. [2022-07-22 12:52:49,572 INFO L78 Accepts]: Start accepts. Automaton has 119245 states and 125500 transitions. Word has length 577 [2022-07-22 12:52:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:49,572 INFO L495 AbstractCegarLoop]: Abstraction has 119245 states and 125500 transitions. [2022-07-22 12:52:49,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 119245 states and 125500 transitions. [2022-07-22 12:52:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2022-07-22 12:52:49,582 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:49,582 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:49,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 12:52:49,583 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:49,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1184107234, now seen corresponding path program 1 times [2022-07-22 12:52:49,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:49,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130216347] [2022-07-22 12:52:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:49,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 822 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-22 12:52:49,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:49,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130216347] [2022-07-22 12:52:49,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130216347] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:49,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:49,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:52:49,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087082608] [2022-07-22 12:52:49,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:49,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:52:49,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:49,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:52:49,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:52:49,774 INFO L87 Difference]: Start difference. First operand 119245 states and 125500 transitions. Second operand has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:52,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:52,921 INFO L93 Difference]: Finished difference Result 262331 states and 275757 transitions. [2022-07-22 12:52:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:52:52,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 593 [2022-07-22 12:52:52,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:53,101 INFO L225 Difference]: With dead ends: 262331 [2022-07-22 12:52:53,102 INFO L226 Difference]: Without dead ends: 143513 [2022-07-22 12:52:53,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:52:53,166 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 728 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 2797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:53,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 232 Invalid, 2797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:52:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143513 states. [2022-07-22 12:52:54,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143513 to 137554. [2022-07-22 12:52:55,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137554 states, 137553 states have (on average 1.0493773309197183) internal successors, (144345), 137553 states have internal predecessors, (144345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:55,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137554 states to 137554 states and 144345 transitions. [2022-07-22 12:52:55,184 INFO L78 Accepts]: Start accepts. Automaton has 137554 states and 144345 transitions. Word has length 593 [2022-07-22 12:52:55,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:55,185 INFO L495 AbstractCegarLoop]: Abstraction has 137554 states and 144345 transitions. [2022-07-22 12:52:55,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:55,185 INFO L276 IsEmpty]: Start isEmpty. Operand 137554 states and 144345 transitions. [2022-07-22 12:52:55,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2022-07-22 12:52:55,443 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:55,443 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:55,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 12:52:55,443 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:55,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:55,444 INFO L85 PathProgramCache]: Analyzing trace with hash 797339594, now seen corresponding path program 1 times [2022-07-22 12:52:55,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:55,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604544858] [2022-07-22 12:52:55,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:55,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 418 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-22 12:52:55,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:55,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604544858] [2022-07-22 12:52:55,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604544858] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:55,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:55,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:52:55,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061513954] [2022-07-22 12:52:55,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:55,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:52:55,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:55,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:52:55,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:52:55,671 INFO L87 Difference]: Start difference. First operand 137554 states and 144345 transitions. Second operand has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:58,494 INFO L93 Difference]: Finished difference Result 151202 states and 158417 transitions. [2022-07-22 12:52:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:52:58,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 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 620 [2022-07-22 12:52:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:58,642 INFO L225 Difference]: With dead ends: 151202 [2022-07-22 12:52:58,642 INFO L226 Difference]: Without dead ends: 150775 [2022-07-22 12:52:58,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:52:58,667 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 837 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 2434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:58,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 154 Invalid, 2812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 2434 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 12:52:58,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150775 states. [2022-07-22 12:53:00,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150775 to 137554. [2022-07-22 12:53:00,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137554 states, 137553 states have (on average 1.0492900918191534) internal successors, (144333), 137553 states have internal predecessors, (144333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137554 states to 137554 states and 144333 transitions. [2022-07-22 12:53:00,566 INFO L78 Accepts]: Start accepts. Automaton has 137554 states and 144333 transitions. Word has length 620 [2022-07-22 12:53:00,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:00,566 INFO L495 AbstractCegarLoop]: Abstraction has 137554 states and 144333 transitions. [2022-07-22 12:53:00,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:00,567 INFO L276 IsEmpty]: Start isEmpty. Operand 137554 states and 144333 transitions. [2022-07-22 12:53:00,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2022-07-22 12:53:00,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:00,596 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:00,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 12:53:00,596 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:00,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:00,597 INFO L85 PathProgramCache]: Analyzing trace with hash -619038834, now seen corresponding path program 1 times [2022-07-22 12:53:00,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:00,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615926941] [2022-07-22 12:53:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:00,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 551 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-07-22 12:53:00,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:00,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615926941] [2022-07-22 12:53:00,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615926941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:00,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:00,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:53:00,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603362105] [2022-07-22 12:53:00,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:00,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:53:00,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:00,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:53:00,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:53:00,905 INFO L87 Difference]: Start difference. First operand 137554 states and 144333 transitions. Second operand has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:03,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:03,810 INFO L93 Difference]: Finished difference Result 289155 states and 303056 transitions. [2022-07-22 12:53:03,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:53:03,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 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 621 [2022-07-22 12:53:03,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:03,992 INFO L225 Difference]: With dead ends: 289155 [2022-07-22 12:53:03,992 INFO L226 Difference]: Without dead ends: 152028 [2022-07-22 12:53:04,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:53:04,070 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 707 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 2774 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 3099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 2774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:04,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 338 Invalid, 3099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 2774 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 12:53:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152028 states.