./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label26.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/Problem15_label26.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 cdf2fa99034a2ce4515fc13e5b104f83251835a7a436038ebabc8d1f47f1da91 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 12:43:07,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:43:07,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:43:07,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 12:43:07,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 12:43:07,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 12:43:07,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 12:43:07,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 12:43:07,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 12:43:07,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 12:43:07,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 12:43:07,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 12:43:07,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:43:07,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:43:07,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:43:07,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:43:07,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:43:07,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:43:07,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:43:07,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:43:07,843 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:43:07,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:43:07,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:43:07,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:43:07,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:43:07,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 12:43:07,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 12:43:07,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 12:43:07,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 12:43:07,852 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 12:43:07,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 12:43:07,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 12:43:07,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 12:43:07,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 12:43:07,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 12:43:07,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 12:43:07,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 12:43:07,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 12:43:07,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 12:43:07,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 12:43:07,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 12:43:07,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 12:43:07,859 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 12:43:07,882 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:43:07,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:43:07,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:43:07,885 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:43:07,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 12:43:07,885 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 12:43:07,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:43:07,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:43:07,886 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:43:07,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:43:07,887 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:43:07,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:43:07,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:43:07,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:43:07,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 12:43:07,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 12:43:07,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 12:43:07,888 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:43:07,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:43:07,888 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:43:07,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 12:43:07,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:43:07,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:43:07,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 12:43:07,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:43:07,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:43:07,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 12:43:07,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 12:43:07,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:43:07,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 12:43:07,890 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 12:43:07,890 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 12:43:07,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 12:43:07,891 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cdf2fa99034a2ce4515fc13e5b104f83251835a7a436038ebabc8d1f47f1da91 [2022-07-22 12:43:08,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:43:08,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:43:08,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:43:08,095 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:43:08,096 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:43:08,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label26.c [2022-07-22 12:43:08,161 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dc5deee3/88ae7e594c4f4a159dbb635641490456/FLAG6a0f3d38c [2022-07-22 12:43:08,632 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 12:43:08,632 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label26.c [2022-07-22 12:43:08,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dc5deee3/88ae7e594c4f4a159dbb635641490456/FLAG6a0f3d38c [2022-07-22 12:43:08,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dc5deee3/88ae7e594c4f4a159dbb635641490456 [2022-07-22 12:43:08,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:43:08,921 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 12:43:08,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:43:08,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:43:08,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:43:08,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:43:08" (1/1) ... [2022-07-22 12:43:08,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f75c2d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:43:08, skipping insertion in model container [2022-07-22 12:43:08,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:43:08" (1/1) ... [2022-07-22 12:43:08,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:43:08,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:43:09,186 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/Problem15_label26.c[6541,6554] [2022-07-22 12:43:09,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:43:09,470 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:43:09,505 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/Problem15_label26.c[6541,6554] [2022-07-22 12:43:09,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:43:09,625 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:43:09,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:43:09 WrapperNode [2022-07-22 12:43:09,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:43:09,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:43:09,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:43:09,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:43:09,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:43:09" (1/1) ... [2022-07-22 12:43:09,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:43:09" (1/1) ... [2022-07-22 12:43:09,790 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2022-07-22 12:43:09,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:43:09,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:43:09,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:43:09,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:43:09,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:43:09" (1/1) ... [2022-07-22 12:43:09,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:43:09" (1/1) ... [2022-07-22 12:43:09,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:43:09" (1/1) ... [2022-07-22 12:43:09,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:43:09" (1/1) ... [2022-07-22 12:43:09,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:43:09" (1/1) ... [2022-07-22 12:43:09,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:43:09" (1/1) ... [2022-07-22 12:43:09,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:43:09" (1/1) ... [2022-07-22 12:43:10,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:43:10,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:43:10,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:43:10,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:43:10,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:43:09" (1/1) ... [2022-07-22 12:43:10,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:43:10,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:43:10,047 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 12:43:10,071 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 12:43:10,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:43:10,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:43:10,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:43:10,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:43:10,143 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:43:10,145 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:43:11,935 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:43:11,942 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:43:11,942 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 12:43:11,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:43:11 BoogieIcfgContainer [2022-07-22 12:43:11,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:43:11,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 12:43:11,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 12:43:11,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 12:43:11,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:43:08" (1/3) ... [2022-07-22 12:43:11,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2530f1ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:43:11, skipping insertion in model container [2022-07-22 12:43:11,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:43:09" (2/3) ... [2022-07-22 12:43:11,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2530f1ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:43:11, skipping insertion in model container [2022-07-22 12:43:11,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:43:11" (3/3) ... [2022-07-22 12:43:11,950 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label26.c [2022-07-22 12:43:11,959 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 12:43:11,959 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 12:43:11,995 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 12:43:11,999 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@2698587c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@39e17917 [2022-07-22 12:43:11,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 12:43:12,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 12:43:12,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-22 12:43:12,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:12,011 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 12:43:12,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:12,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:12,015 INFO L85 PathProgramCache]: Analyzing trace with hash -92557335, now seen corresponding path program 1 times [2022-07-22 12:43:12,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:12,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382303709] [2022-07-22 12:43:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:12,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:12,237 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 12:43:12,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:12,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382303709] [2022-07-22 12:43:12,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382303709] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:12,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:12,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:43:12,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074933079] [2022-07-22 12:43:12,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:12,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:12,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:12,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:12,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:12,261 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 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 12:43:14,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:14,142 INFO L93 Difference]: Finished difference Result 1154 states and 2106 transitions. [2022-07-22 12:43:14,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:14,147 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 12:43:14,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:14,156 INFO L225 Difference]: With dead ends: 1154 [2022-07-22 12:43:14,156 INFO L226 Difference]: Without dead ends: 665 [2022-07-22 12:43:14,159 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 12:43:14,161 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 268 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:14,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 383 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 12:43:14,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-07-22 12:43:14,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 663. [2022-07-22 12:43:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 1.4818731117824773) internal successors, (981), 662 states have internal predecessors, (981), 0 states have call successors, (0), 0 states 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 12:43:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 981 transitions. [2022-07-22 12:43:14,219 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 981 transitions. Word has length 53 [2022-07-22 12:43:14,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:14,220 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 981 transitions. [2022-07-22 12:43:14,220 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 12:43:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 981 transitions. [2022-07-22 12:43:14,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-22 12:43:14,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:14,223 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] [2022-07-22 12:43:14,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 12:43:14,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:14,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1371805199, now seen corresponding path program 1 times [2022-07-22 12:43:14,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:14,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081436062] [2022-07-22 12:43:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:14,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:14,343 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 12:43:14,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:14,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081436062] [2022-07-22 12:43:14,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081436062] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:14,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:14,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:43:14,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532605473] [2022-07-22 12:43:14,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:14,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:14,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:14,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:14,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:14,346 INFO L87 Difference]: Start difference. First operand 663 states and 981 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 12:43:15,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:15,717 INFO L93 Difference]: Finished difference Result 1624 states and 2315 transitions. [2022-07-22 12:43:15,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:15,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2022-07-22 12:43:15,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:15,720 INFO L225 Difference]: With dead ends: 1624 [2022-07-22 12:43:15,720 INFO L226 Difference]: Without dead ends: 963 [2022-07-22 12:43:15,721 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 12:43:15,722 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 237 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:15,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 337 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 12:43:15,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-07-22 12:43:15,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2022-07-22 12:43:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.362785862785863) internal successors, (1311), 962 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states 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 12:43:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1311 transitions. [2022-07-22 12:43:15,740 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1311 transitions. Word has length 118 [2022-07-22 12:43:15,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:15,741 INFO L495 AbstractCegarLoop]: Abstraction has 963 states and 1311 transitions. [2022-07-22 12:43:15,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 12:43:15,741 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1311 transitions. [2022-07-22 12:43:15,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-22 12:43:15,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:15,743 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 12:43:15,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 12:43:15,746 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:15,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:15,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1380310786, now seen corresponding path program 1 times [2022-07-22 12:43:15,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:15,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132584286] [2022-07-22 12:43:15,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:15,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:15,885 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 12:43:15,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:15,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132584286] [2022-07-22 12:43:15,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132584286] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:15,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:15,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:43:15,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271692006] [2022-07-22 12:43:15,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:15,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 12:43:15,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:15,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 12:43:15,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:43:15,890 INFO L87 Difference]: Start difference. First operand 963 states and 1311 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 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 12:43:17,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:17,534 INFO L93 Difference]: Finished difference Result 2244 states and 3201 transitions. [2022-07-22 12:43:17,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:43:17,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 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 12:43:17,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:17,549 INFO L225 Difference]: With dead ends: 2244 [2022-07-22 12:43:17,549 INFO L226 Difference]: Without dead ends: 1582 [2022-07-22 12:43:17,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:43:17,555 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 362 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:17,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 365 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 12:43:17,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2022-07-22 12:43:17,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1266. [2022-07-22 12:43:17,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 1.3043478260869565) internal successors, (1650), 1265 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states 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 12:43:17,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1650 transitions. [2022-07-22 12:43:17,575 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1650 transitions. Word has length 123 [2022-07-22 12:43:17,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:17,576 INFO L495 AbstractCegarLoop]: Abstraction has 1266 states and 1650 transitions. [2022-07-22 12:43:17,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 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 12:43:17,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1650 transitions. [2022-07-22 12:43:17,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-07-22 12:43:17,582 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:17,583 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, 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 12:43:17,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 12:43:17,583 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:17,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:17,586 INFO L85 PathProgramCache]: Analyzing trace with hash 72771962, now seen corresponding path program 1 times [2022-07-22 12:43:17,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:17,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561779068] [2022-07-22 12:43:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:17,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:43:17,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:17,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561779068] [2022-07-22 12:43:17,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561779068] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:17,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:17,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:43:17,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11572204] [2022-07-22 12:43:17,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:17,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:43:17,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:17,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:43:17,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:43:17,769 INFO L87 Difference]: Start difference. First operand 1266 states and 1650 transitions. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 12:43:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:20,246 INFO L93 Difference]: Finished difference Result 4668 states and 6169 transitions. [2022-07-22 12:43:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:43:20,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 219 [2022-07-22 12:43:20,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:20,273 INFO L225 Difference]: With dead ends: 4668 [2022-07-22 12:43:20,274 INFO L226 Difference]: Without dead ends: 3404 [2022-07-22 12:43:20,276 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 12:43:20,282 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 488 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:20,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 346 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1953 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:43:20,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2022-07-22 12:43:20,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 3381. [2022-07-22 12:43:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 3380 states have (on average 1.2363905325443787) internal successors, (4179), 3380 states have internal predecessors, (4179), 0 states have call successors, (0), 0 states 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 12:43:20,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 4179 transitions. [2022-07-22 12:43:20,334 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 4179 transitions. Word has length 219 [2022-07-22 12:43:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:20,335 INFO L495 AbstractCegarLoop]: Abstraction has 3381 states and 4179 transitions. [2022-07-22 12:43:20,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 12:43:20,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 4179 transitions. [2022-07-22 12:43:20,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-22 12:43:20,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:20,339 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:43:20,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 12:43:20,340 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:20,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:20,340 INFO L85 PathProgramCache]: Analyzing trace with hash 907724420, now seen corresponding path program 1 times [2022-07-22 12:43:20,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:20,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129066300] [2022-07-22 12:43:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:20,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-22 12:43:20,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:20,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129066300] [2022-07-22 12:43:20,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129066300] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:20,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:20,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:43:20,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119552355] [2022-07-22 12:43:20,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:20,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:20,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:20,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:20,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:20,469 INFO L87 Difference]: Start difference. First operand 3381 states and 4179 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 12:43:21,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:21,619 INFO L93 Difference]: Finished difference Result 8563 states and 10751 transitions. [2022-07-22 12:43:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:21,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 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 223 [2022-07-22 12:43:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:21,633 INFO L225 Difference]: With dead ends: 8563 [2022-07-22 12:43:21,633 INFO L226 Difference]: Without dead ends: 5483 [2022-07-22 12:43:21,638 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 12:43:21,639 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:21,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 12:43:21,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2022-07-22 12:43:21,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 5478. [2022-07-22 12:43:21,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 1.1683403322987036) internal successors, (6399), 5477 states have internal predecessors, (6399), 0 states have call successors, (0), 0 states 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 12:43:21,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6399 transitions. [2022-07-22 12:43:21,729 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 6399 transitions. Word has length 223 [2022-07-22 12:43:21,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:21,730 INFO L495 AbstractCegarLoop]: Abstraction has 5478 states and 6399 transitions. [2022-07-22 12:43:21,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 12:43:21,733 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 6399 transitions. [2022-07-22 12:43:21,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-07-22 12:43:21,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:21,736 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:43:21,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 12:43:21,737 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:21,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:21,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2143639772, now seen corresponding path program 1 times [2022-07-22 12:43:21,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:21,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526047393] [2022-07-22 12:43:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:21,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-22 12:43:21,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:21,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526047393] [2022-07-22 12:43:21,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526047393] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:21,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:21,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:43:21,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762322833] [2022-07-22 12:43:21,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:21,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:21,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:21,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:21,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:21,880 INFO L87 Difference]: Start difference. First operand 5478 states and 6399 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states 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 12:43:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:23,005 INFO L93 Difference]: Finished difference Result 10655 states and 12485 transitions. [2022-07-22 12:43:23,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:23,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 325 [2022-07-22 12:43:23,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:23,018 INFO L225 Difference]: With dead ends: 10655 [2022-07-22 12:43:23,018 INFO L226 Difference]: Without dead ends: 5478 [2022-07-22 12:43:23,023 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 12:43:23,024 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:23,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 12:43:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2022-07-22 12:43:23,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 5478. [2022-07-22 12:43:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 1.1672448420668249) internal successors, (6393), 5477 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states 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 12:43:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6393 transitions. [2022-07-22 12:43:23,088 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 6393 transitions. Word has length 325 [2022-07-22 12:43:23,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:23,088 INFO L495 AbstractCegarLoop]: Abstraction has 5478 states and 6393 transitions. [2022-07-22 12:43:23,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states 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 12:43:23,089 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 6393 transitions. [2022-07-22 12:43:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-07-22 12:43:23,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:23,092 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, 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] [2022-07-22 12:43:23,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 12:43:23,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:23,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:23,093 INFO L85 PathProgramCache]: Analyzing trace with hash 350088141, now seen corresponding path program 1 times [2022-07-22 12:43:23,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:23,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031747800] [2022-07-22 12:43:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:23,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-22 12:43:23,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:23,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031747800] [2022-07-22 12:43:23,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031747800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:23,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:23,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:43:23,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407590399] [2022-07-22 12:43:23,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:23,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:23,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:23,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:23,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:23,222 INFO L87 Difference]: Start difference. First operand 5478 states and 6393 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states 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 12:43:24,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:24,657 INFO L93 Difference]: Finished difference Result 11851 states and 14145 transitions. [2022-07-22 12:43:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:24,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 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 340 [2022-07-22 12:43:24,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:24,672 INFO L225 Difference]: With dead ends: 11851 [2022-07-22 12:43:24,673 INFO L226 Difference]: Without dead ends: 6674 [2022-07-22 12:43:24,677 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 12:43:24,679 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 262 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:24,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 322 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 12:43:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6674 states. [2022-07-22 12:43:24,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6674 to 4577. [2022-07-22 12:43:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4577 states, 4576 states have (on average 1.1840034965034965) internal successors, (5418), 4576 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states 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 12:43:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4577 states to 4577 states and 5418 transitions. [2022-07-22 12:43:24,741 INFO L78 Accepts]: Start accepts. Automaton has 4577 states and 5418 transitions. Word has length 340 [2022-07-22 12:43:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:24,742 INFO L495 AbstractCegarLoop]: Abstraction has 4577 states and 5418 transitions. [2022-07-22 12:43:24,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states 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 12:43:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 4577 states and 5418 transitions. [2022-07-22 12:43:24,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-07-22 12:43:24,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:24,746 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:43:24,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 12:43:24,747 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:24,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:24,747 INFO L85 PathProgramCache]: Analyzing trace with hash -683428854, now seen corresponding path program 1 times [2022-07-22 12:43:24,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:24,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100438246] [2022-07-22 12:43:24,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:24,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 12:43:24,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:24,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100438246] [2022-07-22 12:43:24,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100438246] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:24,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:24,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:43:24,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796859969] [2022-07-22 12:43:24,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:24,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:24,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:24,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:24,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:24,921 INFO L87 Difference]: Start difference. First operand 4577 states and 5418 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 12:43:26,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:26,218 INFO L93 Difference]: Finished difference Result 10960 states and 13243 transitions. [2022-07-22 12:43:26,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:26,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 12:43:26,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:26,234 INFO L225 Difference]: With dead ends: 10960 [2022-07-22 12:43:26,235 INFO L226 Difference]: Without dead ends: 6684 [2022-07-22 12:43:26,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:26,240 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 342 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:26,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 194 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 12:43:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6684 states. [2022-07-22 12:43:26,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6684 to 5184. [2022-07-22 12:43:26,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5184 states, 5183 states have (on average 1.2249662357707891) internal successors, (6349), 5183 states have internal predecessors, (6349), 0 states have call successors, (0), 0 states 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 12:43:26,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5184 states to 5184 states and 6349 transitions. [2022-07-22 12:43:26,345 INFO L78 Accepts]: Start accepts. Automaton has 5184 states and 6349 transitions. Word has length 399 [2022-07-22 12:43:26,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:26,346 INFO L495 AbstractCegarLoop]: Abstraction has 5184 states and 6349 transitions. [2022-07-22 12:43:26,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 12:43:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 5184 states and 6349 transitions. [2022-07-22 12:43:26,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2022-07-22 12:43:26,361 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:26,362 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, 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] [2022-07-22 12:43:26,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 12:43:26,363 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:26,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:26,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1754448899, now seen corresponding path program 1 times [2022-07-22 12:43:26,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:26,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561419355] [2022-07-22 12:43:26,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:26,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:43:26,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:26,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561419355] [2022-07-22 12:43:26,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561419355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:26,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:26,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:43:26,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794710013] [2022-07-22 12:43:26,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:26,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:26,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:26,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:26,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:26,544 INFO L87 Difference]: Start difference. First operand 5184 states and 6349 transitions. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 12:43:27,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:27,930 INFO L93 Difference]: Finished difference Result 11268 states and 13765 transitions. [2022-07-22 12:43:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:27,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 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 416 [2022-07-22 12:43:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:27,943 INFO L225 Difference]: With dead ends: 11268 [2022-07-22 12:43:27,944 INFO L226 Difference]: Without dead ends: 6385 [2022-07-22 12:43:27,948 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 12:43:27,950 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 249 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:27,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 625 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 12:43:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6385 states. [2022-07-22 12:43:27,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6385 to 6083. [2022-07-22 12:43:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6083 states, 6082 states have (on average 1.1428806313712594) internal successors, (6951), 6082 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states 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 12:43:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6083 states to 6083 states and 6951 transitions. [2022-07-22 12:43:28,013 INFO L78 Accepts]: Start accepts. Automaton has 6083 states and 6951 transitions. Word has length 416 [2022-07-22 12:43:28,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:28,016 INFO L495 AbstractCegarLoop]: Abstraction has 6083 states and 6951 transitions. [2022-07-22 12:43:28,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 12:43:28,016 INFO L276 IsEmpty]: Start isEmpty. Operand 6083 states and 6951 transitions. [2022-07-22 12:43:28,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-07-22 12:43:28,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:28,043 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, 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] [2022-07-22 12:43:28,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 12:43:28,043 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:28,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:28,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1079722266, now seen corresponding path program 1 times [2022-07-22 12:43:28,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:28,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352302922] [2022-07-22 12:43:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:28,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 313 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-22 12:43:28,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:28,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352302922] [2022-07-22 12:43:28,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352302922] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:28,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:28,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:43:28,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860226256] [2022-07-22 12:43:28,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:28,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:28,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:28,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:28,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:28,177 INFO L87 Difference]: Start difference. First operand 6083 states and 6951 transitions. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 12:43:29,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:29,395 INFO L93 Difference]: Finished difference Result 13661 states and 15886 transitions. [2022-07-22 12:43:29,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:29,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 421 [2022-07-22 12:43:29,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:29,409 INFO L225 Difference]: With dead ends: 13661 [2022-07-22 12:43:29,409 INFO L226 Difference]: Without dead ends: 7879 [2022-07-22 12:43:29,413 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 12:43:29,414 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 245 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:29,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 619 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 12:43:29,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7879 states. [2022-07-22 12:43:29,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7879 to 7875. [2022-07-22 12:43:29,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7875 states, 7874 states have (on average 1.1282702565405132) internal successors, (8884), 7874 states have internal predecessors, (8884), 0 states have call successors, (0), 0 states 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 12:43:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7875 states to 7875 states and 8884 transitions. [2022-07-22 12:43:29,476 INFO L78 Accepts]: Start accepts. Automaton has 7875 states and 8884 transitions. Word has length 421 [2022-07-22 12:43:29,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:29,476 INFO L495 AbstractCegarLoop]: Abstraction has 7875 states and 8884 transitions. [2022-07-22 12:43:29,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 12:43:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 7875 states and 8884 transitions. [2022-07-22 12:43:29,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2022-07-22 12:43:29,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:29,481 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:43:29,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 12:43:29,481 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:29,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1964586309, now seen corresponding path program 1 times [2022-07-22 12:43:29,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:29,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984913680] [2022-07-22 12:43:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:29,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-07-22 12:43:29,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:29,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984913680] [2022-07-22 12:43:29,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984913680] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:29,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:29,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:43:29,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330138734] [2022-07-22 12:43:29,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:29,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:29,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:29,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:29,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:29,639 INFO L87 Difference]: Start difference. First operand 7875 states and 8884 transitions. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 12:43:30,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:30,886 INFO L93 Difference]: Finished difference Result 17541 states and 20130 transitions. [2022-07-22 12:43:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:30,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 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 517 [2022-07-22 12:43:30,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:30,898 INFO L225 Difference]: With dead ends: 17541 [2022-07-22 12:43:30,898 INFO L226 Difference]: Without dead ends: 9967 [2022-07-22 12:43:30,905 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 12:43:30,906 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 362 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:30,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 447 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 12:43:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9967 states. [2022-07-22 12:43:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9967 to 9967. [2022-07-22 12:43:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9967 states, 9966 states have (on average 1.1420830824804336) internal successors, (11382), 9966 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states 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 12:43:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9967 states to 9967 states and 11382 transitions. [2022-07-22 12:43:30,994 INFO L78 Accepts]: Start accepts. Automaton has 9967 states and 11382 transitions. Word has length 517 [2022-07-22 12:43:30,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:30,995 INFO L495 AbstractCegarLoop]: Abstraction has 9967 states and 11382 transitions. [2022-07-22 12:43:30,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 12:43:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 9967 states and 11382 transitions. [2022-07-22 12:43:31,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2022-07-22 12:43:31,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:31,032 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, 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, 2, 2, 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] [2022-07-22 12:43:31,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 12:43:31,032 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:31,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:31,033 INFO L85 PathProgramCache]: Analyzing trace with hash 667607770, now seen corresponding path program 1 times [2022-07-22 12:43:31,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:31,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926643090] [2022-07-22 12:43:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:31,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 598 proven. 39 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-22 12:43:31,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:31,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926643090] [2022-07-22 12:43:31,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926643090] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:43:31,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116934536] [2022-07-22 12:43:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:31,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:43:31,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:43:31,234 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 12:43:31,239 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 12:43:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:31,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 12:43:31,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:43:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 598 proven. 39 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-22 12:43:32,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:43:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 598 proven. 39 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-22 12:43:32,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116934536] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 12:43:32,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 12:43:32,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-22 12:43:32,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321297627] [2022-07-22 12:43:32,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 12:43:32,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 12:43:32,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:32,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 12:43:32,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:43:32,667 INFO L87 Difference]: Start difference. First operand 9967 states and 11382 transitions. Second operand has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 0 states have call successors, (0), 0 states 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 12:43:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:38,383 INFO L93 Difference]: Finished difference Result 26769 states and 30359 transitions. [2022-07-22 12:43:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 12:43:38,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 0 states have call successors, (0), 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 608 [2022-07-22 12:43:38,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:38,396 INFO L225 Difference]: With dead ends: 26769 [2022-07-22 12:43:38,396 INFO L226 Difference]: Without dead ends: 11461 [2022-07-22 12:43:38,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1225 GetRequests, 1210 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-07-22 12:43:38,408 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 2643 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 6494 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2643 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 7154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 6494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:38,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2643 Valid, 290 Invalid, 7154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 6494 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-07-22 12:43:38,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11461 states. [2022-07-22 12:43:38,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11461 to 8169. [2022-07-22 12:43:38,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8169 states, 8168 states have (on average 1.0668462291870715) internal successors, (8714), 8168 states have internal predecessors, (8714), 0 states have call successors, (0), 0 states 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 12:43:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8169 states to 8169 states and 8714 transitions. [2022-07-22 12:43:38,542 INFO L78 Accepts]: Start accepts. Automaton has 8169 states and 8714 transitions. Word has length 608 [2022-07-22 12:43:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:38,542 INFO L495 AbstractCegarLoop]: Abstraction has 8169 states and 8714 transitions. [2022-07-22 12:43:38,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 0 states have call successors, (0), 0 states 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 12:43:38,543 INFO L276 IsEmpty]: Start isEmpty. Operand 8169 states and 8714 transitions. [2022-07-22 12:43:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2022-07-22 12:43:38,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:38,551 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:43:38,572 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 12:43:38,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 12:43:38,770 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:38,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:38,771 INFO L85 PathProgramCache]: Analyzing trace with hash 307890966, now seen corresponding path program 1 times [2022-07-22 12:43:38,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:38,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900247817] [2022-07-22 12:43:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:38,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2022-07-22 12:43:38,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:38,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900247817] [2022-07-22 12:43:38,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900247817] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:38,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:38,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:43:38,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559844919] [2022-07-22 12:43:38,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:38,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:38,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:38,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:38,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:38,979 INFO L87 Difference]: Start difference. First operand 8169 states and 8714 transitions. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 12:43:39,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:39,947 INFO L93 Difference]: Finished difference Result 18428 states and 19792 transitions. [2022-07-22 12:43:39,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:39,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 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 678 [2022-07-22 12:43:39,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:39,958 INFO L225 Difference]: With dead ends: 18428 [2022-07-22 12:43:39,958 INFO L226 Difference]: Without dead ends: 10261 [2022-07-22 12:43:39,967 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 12:43:39,967 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 277 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:39,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 191 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 12:43:39,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10261 states. [2022-07-22 12:43:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10261 to 9961. [2022-07-22 12:43:40,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9961 states, 9960 states have (on average 1.0639558232931727) internal successors, (10597), 9960 states have internal predecessors, (10597), 0 states have call successors, (0), 0 states 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 12:43:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9961 states to 9961 states and 10597 transitions. [2022-07-22 12:43:40,084 INFO L78 Accepts]: Start accepts. Automaton has 9961 states and 10597 transitions. Word has length 678 [2022-07-22 12:43:40,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:40,085 INFO L495 AbstractCegarLoop]: Abstraction has 9961 states and 10597 transitions. [2022-07-22 12:43:40,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 12:43:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 9961 states and 10597 transitions. [2022-07-22 12:43:40,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2022-07-22 12:43:40,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:40,093 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:43:40,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 12:43:40,094 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:40,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:40,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1841661433, now seen corresponding path program 1 times [2022-07-22 12:43:40,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:40,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655085159] [2022-07-22 12:43:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:40,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 596 proven. 190 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-22 12:43:40,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:40,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655085159] [2022-07-22 12:43:40,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655085159] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:43:40,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729916081] [2022-07-22 12:43:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:40,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:43:40,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:43:40,326 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 12:43:40,339 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 12:43:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:40,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:43:40,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:43:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2022-07-22 12:43:41,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:43:41,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729916081] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:41,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:43:41,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-22 12:43:41,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104145831] [2022-07-22 12:43:41,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:41,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:41,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:41,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:41,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:43:41,362 INFO L87 Difference]: Start difference. First operand 9961 states and 10597 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states 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 12:43:41,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:41,393 INFO L93 Difference]: Finished difference Result 10014 states and 10650 transitions. [2022-07-22 12:43:41,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:41,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 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 685 [2022-07-22 12:43:41,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:41,403 INFO L225 Difference]: With dead ends: 10014 [2022-07-22 12:43:41,404 INFO L226 Difference]: Without dead ends: 10012 [2022-07-22 12:43:41,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 684 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:43:41,407 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 505 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:41,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 537 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 505 Unchecked, 0.0s Time] [2022-07-22 12:43:41,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10012 states. [2022-07-22 12:43:41,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10012 to 10012. [2022-07-22 12:43:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10012 states, 10011 states have (on average 1.0636300069923084) internal successors, (10648), 10011 states have internal predecessors, (10648), 0 states have call successors, (0), 0 states 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 12:43:41,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10012 states to 10012 states and 10648 transitions. [2022-07-22 12:43:41,505 INFO L78 Accepts]: Start accepts. Automaton has 10012 states and 10648 transitions. Word has length 685 [2022-07-22 12:43:41,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:41,505 INFO L495 AbstractCegarLoop]: Abstraction has 10012 states and 10648 transitions. [2022-07-22 12:43:41,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states 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 12:43:41,506 INFO L276 IsEmpty]: Start isEmpty. Operand 10012 states and 10648 transitions. [2022-07-22 12:43:41,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2022-07-22 12:43:41,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:41,513 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, 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, 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] [2022-07-22 12:43:41,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 12:43:41,719 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,SelfDestructingSolverStorable13 [2022-07-22 12:43:41,720 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:41,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:41,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1428206667, now seen corresponding path program 1 times [2022-07-22 12:43:41,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:41,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629306853] [2022-07-22 12:43:41,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:41,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 526 proven. 0 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-22 12:43:41,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:41,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629306853] [2022-07-22 12:43:41,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629306853] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:41,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:41,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:43:41,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734970066] [2022-07-22 12:43:41,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:41,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:41,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:41,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:41,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:41,949 INFO L87 Difference]: Start difference. First operand 10012 states and 10648 transitions. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 12:43:42,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:42,875 INFO L93 Difference]: Finished difference Result 19721 states and 20991 transitions. [2022-07-22 12:43:42,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:42,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 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 700 [2022-07-22 12:43:42,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:42,886 INFO L225 Difference]: With dead ends: 19721 [2022-07-22 12:43:42,886 INFO L226 Difference]: Without dead ends: 10010 [2022-07-22 12:43:42,894 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 12:43:42,894 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 435 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:42,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 69 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 12:43:42,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10010 states. [2022-07-22 12:43:42,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10010 to 10010. [2022-07-22 12:43:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10010 states, 10009 states have (on average 1.06344290138875) internal successors, (10644), 10009 states have internal predecessors, (10644), 0 states have call successors, (0), 0 states 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 12:43:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10010 states to 10010 states and 10644 transitions. [2022-07-22 12:43:42,989 INFO L78 Accepts]: Start accepts. Automaton has 10010 states and 10644 transitions. Word has length 700 [2022-07-22 12:43:42,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:42,990 INFO L495 AbstractCegarLoop]: Abstraction has 10010 states and 10644 transitions. [2022-07-22 12:43:42,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 12:43:42,990 INFO L276 IsEmpty]: Start isEmpty. Operand 10010 states and 10644 transitions. [2022-07-22 12:43:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2022-07-22 12:43:42,998 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:42,999 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:43:42,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 12:43:42,999 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:43,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:43,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1459953853, now seen corresponding path program 1 times [2022-07-22 12:43:43,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:43,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090345453] [2022-07-22 12:43:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:43,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2022-07-22 12:43:43,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:43,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090345453] [2022-07-22 12:43:43,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090345453] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:43,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:43,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:43:43,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050674922] [2022-07-22 12:43:43,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:43,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:43:43,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:43,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:43:43,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:43:43,283 INFO L87 Difference]: Start difference. First operand 10010 states and 10644 transitions. Second operand has 4 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:43:44,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:44,883 INFO L93 Difference]: Finished difference Result 21524 states and 22953 transitions. [2022-07-22 12:43:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:43:44,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 711 [2022-07-22 12:43:44,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:44,896 INFO L225 Difference]: With dead ends: 21524 [2022-07-22 12:43:44,896 INFO L226 Difference]: Without dead ends: 11815 [2022-07-22 12:43:44,903 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 12:43:44,904 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 659 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:44,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 453 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1831 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 12:43:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11815 states. [2022-07-22 12:43:45,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11815 to 11217. [2022-07-22 12:43:45,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11217 states, 11216 states have (on average 1.0582203994293866) internal successors, (11869), 11216 states have internal predecessors, (11869), 0 states have call successors, (0), 0 states 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 12:43:45,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11217 states to 11217 states and 11869 transitions. [2022-07-22 12:43:45,031 INFO L78 Accepts]: Start accepts. Automaton has 11217 states and 11869 transitions. Word has length 711 [2022-07-22 12:43:45,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:45,032 INFO L495 AbstractCegarLoop]: Abstraction has 11217 states and 11869 transitions. [2022-07-22 12:43:45,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:43:45,032 INFO L276 IsEmpty]: Start isEmpty. Operand 11217 states and 11869 transitions. [2022-07-22 12:43:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2022-07-22 12:43:45,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:45,040 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:43:45,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 12:43:45,041 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:45,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:45,041 INFO L85 PathProgramCache]: Analyzing trace with hash 57118497, now seen corresponding path program 1 times [2022-07-22 12:43:45,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:45,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190182773] [2022-07-22 12:43:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:45,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 425 proven. 402 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 12:43:45,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:45,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190182773] [2022-07-22 12:43:45,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190182773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:43:45,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184260402] [2022-07-22 12:43:45,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:45,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:43:45,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:43:45,376 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 12:43:45,377 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 12:43:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:45,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:43:45,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:43:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 570 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-07-22 12:43:45,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:43:45,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184260402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:45,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:43:45,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 12:43:45,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20482008] [2022-07-22 12:43:45,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:45,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:45,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:45,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:45,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:43:45,693 INFO L87 Difference]: Start difference. First operand 11217 states and 11869 transitions. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states 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 12:43:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:46,546 INFO L93 Difference]: Finished difference Result 22130 states and 23430 transitions. [2022-07-22 12:43:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:46,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 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 734 [2022-07-22 12:43:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:46,558 INFO L225 Difference]: With dead ends: 22130 [2022-07-22 12:43:46,558 INFO L226 Difference]: Without dead ends: 11214 [2022-07-22 12:43:46,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:43:46,566 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 196 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:46,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 472 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 12:43:46,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11214 states. [2022-07-22 12:43:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11214 to 10915. [2022-07-22 12:43:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10915 states, 10914 states have (on average 1.0428807036833425) internal successors, (11382), 10914 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states 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 12:43:46,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10915 states to 10915 states and 11382 transitions. [2022-07-22 12:43:46,665 INFO L78 Accepts]: Start accepts. Automaton has 10915 states and 11382 transitions. Word has length 734 [2022-07-22 12:43:46,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:46,666 INFO L495 AbstractCegarLoop]: Abstraction has 10915 states and 11382 transitions. [2022-07-22 12:43:46,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states 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 12:43:46,666 INFO L276 IsEmpty]: Start isEmpty. Operand 10915 states and 11382 transitions. [2022-07-22 12:43:46,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 738 [2022-07-22 12:43:46,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:46,673 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:43:46,701 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 12:43:46,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:43:46,900 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:46,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:46,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1383348304, now seen corresponding path program 1 times [2022-07-22 12:43:46,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:46,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295733667] [2022-07-22 12:43:46,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:46,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2022-07-22 12:43:47,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:47,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295733667] [2022-07-22 12:43:47,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295733667] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:47,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:47,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:43:47,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202398928] [2022-07-22 12:43:47,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:47,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:47,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:47,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:47,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:47,132 INFO L87 Difference]: Start difference. First operand 10915 states and 11382 transitions. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states 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 12:43:48,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:48,241 INFO L93 Difference]: Finished difference Result 26335 states and 27481 transitions. [2022-07-22 12:43:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:48,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 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 737 [2022-07-22 12:43:48,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:48,257 INFO L225 Difference]: With dead ends: 26335 [2022-07-22 12:43:48,257 INFO L226 Difference]: Without dead ends: 15422 [2022-07-22 12:43:48,265 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 12:43:48,266 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 281 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:48,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 209 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 12:43:48,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15422 states. [2022-07-22 12:43:48,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15422 to 13010. [2022-07-22 12:43:48,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13010 states, 13009 states have (on average 1.0443539088323468) internal successors, (13586), 13009 states have internal predecessors, (13586), 0 states have call successors, (0), 0 states 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 12:43:48,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13010 states to 13010 states and 13586 transitions. [2022-07-22 12:43:48,396 INFO L78 Accepts]: Start accepts. Automaton has 13010 states and 13586 transitions. Word has length 737 [2022-07-22 12:43:48,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:48,396 INFO L495 AbstractCegarLoop]: Abstraction has 13010 states and 13586 transitions. [2022-07-22 12:43:48,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states 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 12:43:48,397 INFO L276 IsEmpty]: Start isEmpty. Operand 13010 states and 13586 transitions. [2022-07-22 12:43:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2022-07-22 12:43:48,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:48,405 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:43:48,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 12:43:48,405 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:48,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:48,406 INFO L85 PathProgramCache]: Analyzing trace with hash 251376969, now seen corresponding path program 1 times [2022-07-22 12:43:48,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:48,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312841363] [2022-07-22 12:43:48,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:48,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 701 proven. 0 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-07-22 12:43:48,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:48,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312841363] [2022-07-22 12:43:48,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312841363] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:48,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:48,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:43:48,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277403091] [2022-07-22 12:43:48,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:48,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:48,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:48,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:48,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:48,653 INFO L87 Difference]: Start difference. First operand 13010 states and 13586 transitions. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states 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 12:43:49,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:49,546 INFO L93 Difference]: Finished difference Result 27803 states and 29081 transitions. [2022-07-22 12:43:49,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:49,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 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 773 [2022-07-22 12:43:49,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:49,560 INFO L225 Difference]: With dead ends: 27803 [2022-07-22 12:43:49,560 INFO L226 Difference]: Without dead ends: 15094 [2022-07-22 12:43:49,568 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 12:43:49,569 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 195 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:49,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 458 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 12:43:49,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15094 states. [2022-07-22 12:43:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15094 to 13599. [2022-07-22 12:43:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13599 states, 13598 states have (on average 1.0411089866156789) internal successors, (14157), 13598 states have internal predecessors, (14157), 0 states have call successors, (0), 0 states 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 12:43:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13599 states to 13599 states and 14157 transitions. [2022-07-22 12:43:49,692 INFO L78 Accepts]: Start accepts. Automaton has 13599 states and 14157 transitions. Word has length 773 [2022-07-22 12:43:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:49,693 INFO L495 AbstractCegarLoop]: Abstraction has 13599 states and 14157 transitions. [2022-07-22 12:43:49,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states 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 12:43:49,693 INFO L276 IsEmpty]: Start isEmpty. Operand 13599 states and 14157 transitions. [2022-07-22 12:43:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2022-07-22 12:43:49,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:49,701 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:43:49,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 12:43:49,701 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:49,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:49,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1307672979, now seen corresponding path program 1 times [2022-07-22 12:43:49,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:49,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095370909] [2022-07-22 12:43:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:49,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 709 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-07-22 12:43:50,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:50,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095370909] [2022-07-22 12:43:50,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095370909] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:50,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:50,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 12:43:50,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060306120] [2022-07-22 12:43:50,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:50,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 12:43:50,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:50,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 12:43:50,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:43:50,014 INFO L87 Difference]: Start difference. First operand 13599 states and 14157 transitions. Second operand has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states 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 12:43:51,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:51,013 INFO L93 Difference]: Finished difference Result 29676 states and 30945 transitions. [2022-07-22 12:43:51,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:43:51,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 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 830 [2022-07-22 12:43:51,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:51,032 INFO L225 Difference]: With dead ends: 29676 [2022-07-22 12:43:51,032 INFO L226 Difference]: Without dead ends: 16378 [2022-07-22 12:43:51,042 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 12:43:51,042 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 706 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:51,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 536 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 12:43:51,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16378 states. [2022-07-22 12:43:51,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16378 to 15394. [2022-07-22 12:43:51,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15394 states, 15393 states have (on average 1.038264146040408) internal successors, (15982), 15393 states have internal predecessors, (15982), 0 states have call successors, (0), 0 states 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 12:43:51,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15394 states to 15394 states and 15982 transitions. [2022-07-22 12:43:51,185 INFO L78 Accepts]: Start accepts. Automaton has 15394 states and 15982 transitions. Word has length 830 [2022-07-22 12:43:51,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:51,186 INFO L495 AbstractCegarLoop]: Abstraction has 15394 states and 15982 transitions. [2022-07-22 12:43:51,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states 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 12:43:51,187 INFO L276 IsEmpty]: Start isEmpty. Operand 15394 states and 15982 transitions. [2022-07-22 12:43:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 888 [2022-07-22 12:43:51,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:51,232 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:43:51,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 12:43:51,232 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:51,233 INFO L85 PathProgramCache]: Analyzing trace with hash -293567428, now seen corresponding path program 1 times [2022-07-22 12:43:51,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:51,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642268007] [2022-07-22 12:43:51,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:51,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 873 trivial. 0 not checked. [2022-07-22 12:43:51,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:51,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642268007] [2022-07-22 12:43:51,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642268007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:51,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:51,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:43:51,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916030480] [2022-07-22 12:43:51,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:51,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:51,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:51,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:51,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:51,547 INFO L87 Difference]: Start difference. First operand 15394 states and 15982 transitions. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:43:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:52,596 INFO L93 Difference]: Finished difference Result 35590 states and 36935 transitions. [2022-07-22 12:43:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:52,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 887 [2022-07-22 12:43:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:52,617 INFO L225 Difference]: With dead ends: 35590 [2022-07-22 12:43:52,617 INFO L226 Difference]: Without dead ends: 20198 [2022-07-22 12:43:52,628 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 12:43:52,629 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 297 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:52,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 122 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 12:43:52,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20198 states. [2022-07-22 12:43:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20198 to 16293. [2022-07-22 12:43:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16293 states, 16292 states have (on average 1.0359685735330224) internal successors, (16878), 16292 states have internal predecessors, (16878), 0 states have call successors, (0), 0 states 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 12:43:52,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16293 states to 16293 states and 16878 transitions. [2022-07-22 12:43:52,794 INFO L78 Accepts]: Start accepts. Automaton has 16293 states and 16878 transitions. Word has length 887 [2022-07-22 12:43:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:52,795 INFO L495 AbstractCegarLoop]: Abstraction has 16293 states and 16878 transitions. [2022-07-22 12:43:52,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:43:52,795 INFO L276 IsEmpty]: Start isEmpty. Operand 16293 states and 16878 transitions. [2022-07-22 12:43:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2022-07-22 12:43:52,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:52,806 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:43:52,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 12:43:52,807 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:52,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:52,807 INFO L85 PathProgramCache]: Analyzing trace with hash 61988755, now seen corresponding path program 1 times [2022-07-22 12:43:52,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:52,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427967388] [2022-07-22 12:43:52,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:52,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 640 proven. 0 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-07-22 12:43:53,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:53,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427967388] [2022-07-22 12:43:53,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427967388] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:53,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:53,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:43:53,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295450602] [2022-07-22 12:43:53,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:53,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:53,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:53,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:53,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:53,094 INFO L87 Difference]: Start difference. First operand 16293 states and 16878 transitions. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 12:43:53,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:53,849 INFO L93 Difference]: Finished difference Result 27168 states and 28074 transitions. [2022-07-22 12:43:53,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:53,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 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 920 [2022-07-22 12:43:53,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:53,861 INFO L225 Difference]: With dead ends: 27168 [2022-07-22 12:43:53,862 INFO L226 Difference]: Without dead ends: 10877 [2022-07-22 12:43:53,869 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 12:43:53,869 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 178 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:53,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 76 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 12:43:53,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10877 states. [2022-07-22 12:43:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10877 to 8470. [2022-07-22 12:43:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8470 states, 8469 states have (on average 1.0284567245247374) internal successors, (8710), 8469 states have internal predecessors, (8710), 0 states have call successors, (0), 0 states 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 12:43:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8470 states to 8470 states and 8710 transitions. [2022-07-22 12:43:53,946 INFO L78 Accepts]: Start accepts. Automaton has 8470 states and 8710 transitions. Word has length 920 [2022-07-22 12:43:53,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:53,946 INFO L495 AbstractCegarLoop]: Abstraction has 8470 states and 8710 transitions. [2022-07-22 12:43:53,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 12:43:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 8470 states and 8710 transitions. [2022-07-22 12:43:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 926 [2022-07-22 12:43:53,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:53,958 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 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 12:43:53,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 12:43:53,958 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:53,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:53,959 INFO L85 PathProgramCache]: Analyzing trace with hash -196750209, now seen corresponding path program 1 times [2022-07-22 12:43:53,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:53,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408620292] [2022-07-22 12:43:53,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:53,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 742 proven. 0 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2022-07-22 12:43:54,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:54,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408620292] [2022-07-22 12:43:54,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408620292] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:54,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:43:54,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:43:54,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890762806] [2022-07-22 12:43:54,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:54,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:43:54,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:54,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:43:54,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:43:54,219 INFO L87 Difference]: Start difference. First operand 8470 states and 8710 transitions. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 12:43:54,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:54,933 INFO L93 Difference]: Finished difference Result 18133 states and 18691 transitions. [2022-07-22 12:43:54,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:43:54,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 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 925 [2022-07-22 12:43:54,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:54,942 INFO L225 Difference]: With dead ends: 18133 [2022-07-22 12:43:54,942 INFO L226 Difference]: Without dead ends: 9964 [2022-07-22 12:43:54,946 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 12:43:54,947 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 311 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:54,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 412 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 12:43:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9964 states. [2022-07-22 12:43:55,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9964 to 9964. [2022-07-22 12:43:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 1.0278028706212987) internal successors, (10240), 9963 states have internal predecessors, (10240), 0 states have call successors, (0), 0 states 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 12:43:55,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 10240 transitions. [2022-07-22 12:43:55,022 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 10240 transitions. Word has length 925 [2022-07-22 12:43:55,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:55,022 INFO L495 AbstractCegarLoop]: Abstraction has 9964 states and 10240 transitions. [2022-07-22 12:43:55,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 12:43:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 10240 transitions. [2022-07-22 12:43:55,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 947 [2022-07-22 12:43:55,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:55,032 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:43:55,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 12:43:55,032 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:55,033 INFO L85 PathProgramCache]: Analyzing trace with hash -634879843, now seen corresponding path program 1 times [2022-07-22 12:43:55,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:55,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022541142] [2022-07-22 12:43:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:55,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 795 proven. 269 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-07-22 12:43:55,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:43:55,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022541142] [2022-07-22 12:43:55,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022541142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:43:55,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424593500] [2022-07-22 12:43:55,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:55,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:43:55,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:43:55,332 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 12:43:55,388 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 12:43:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:43:55,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 12:43:55,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:43:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 1003 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-22 12:43:58,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:43:58,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424593500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:43:58,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:43:58,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2022-07-22 12:43:58,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034372062] [2022-07-22 12:43:58,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:43:58,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 12:43:58,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:43:58,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 12:43:58,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:43:58,458 INFO L87 Difference]: Start difference. First operand 9964 states and 10240 transitions. Second operand has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 12:43:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:43:59,481 INFO L93 Difference]: Finished difference Result 20316 states and 20893 transitions. [2022-07-22 12:43:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 12:43:59,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 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 946 [2022-07-22 12:43:59,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:43:59,491 INFO L225 Difference]: With dead ends: 20316 [2022-07-22 12:43:59,491 INFO L226 Difference]: Without dead ends: 10653 [2022-07-22 12:43:59,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 944 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-22 12:43:59,497 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 287 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 2676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1204 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:43:59,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 443 Invalid, 2676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1379 Invalid, 0 Unknown, 1204 Unchecked, 0.9s Time] [2022-07-22 12:43:59,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10653 states. [2022-07-22 12:43:59,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10653 to 10205. [2022-07-22 12:43:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10205 states, 10204 states have (on average 1.0250882007056057) internal successors, (10460), 10204 states have internal predecessors, (10460), 0 states have call successors, (0), 0 states 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 12:43:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10205 states to 10205 states and 10460 transitions. [2022-07-22 12:43:59,588 INFO L78 Accepts]: Start accepts. Automaton has 10205 states and 10460 transitions. Word has length 946 [2022-07-22 12:43:59,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:43:59,588 INFO L495 AbstractCegarLoop]: Abstraction has 10205 states and 10460 transitions. [2022-07-22 12:43:59,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 12:43:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 10205 states and 10460 transitions. [2022-07-22 12:43:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1065 [2022-07-22 12:43:59,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:43:59,600 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:43:59,619 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 12:43:59,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:43:59,801 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:43:59,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:43:59,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1484991638, now seen corresponding path program 1 times [2022-07-22 12:43:59,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:43:59,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104975717] [2022-07-22 12:43:59,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:43:59,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:43:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:44:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 1309 proven. 0 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2022-07-22 12:44:00,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:44:00,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104975717] [2022-07-22 12:44:00,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104975717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:44:00,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:44:00,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:44:00,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133852641] [2022-07-22 12:44:00,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:44:00,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:44:00,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:44:00,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:44:00,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:44:00,098 INFO L87 Difference]: Start difference. First operand 10205 states and 10460 transitions. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states 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 12:44:00,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:44:00,907 INFO L93 Difference]: Finished difference Result 23107 states and 23700 transitions. [2022-07-22 12:44:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:44:00,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 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 1064 [2022-07-22 12:44:00,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:44:00,919 INFO L225 Difference]: With dead ends: 23107 [2022-07-22 12:44:00,919 INFO L226 Difference]: Without dead ends: 13203 [2022-07-22 12:44:00,924 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 12:44:00,925 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 186 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:44:00,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 406 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 12:44:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13203 states. [2022-07-22 12:44:01,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13203 to 12058. [2022-07-22 12:44:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12058 states, 12057 states have (on average 1.023057145226839) internal successors, (12335), 12057 states have internal predecessors, (12335), 0 states have call successors, (0), 0 states 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 12:44:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12058 states to 12058 states and 12335 transitions. [2022-07-22 12:44:01,034 INFO L78 Accepts]: Start accepts. Automaton has 12058 states and 12335 transitions. Word has length 1064 [2022-07-22 12:44:01,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:44:01,035 INFO L495 AbstractCegarLoop]: Abstraction has 12058 states and 12335 transitions. [2022-07-22 12:44:01,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states 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 12:44:01,035 INFO L276 IsEmpty]: Start isEmpty. Operand 12058 states and 12335 transitions. [2022-07-22 12:44:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1075 [2022-07-22 12:44:01,047 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:44:01,048 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:44:01,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 12:44:01,048 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:44:01,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:44:01,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1636143562, now seen corresponding path program 1 times [2022-07-22 12:44:01,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:44:01,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385357288] [2022-07-22 12:44:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:44:01,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:44:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:44:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 1135 proven. 219 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2022-07-22 12:44:01,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:44:01,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385357288] [2022-07-22 12:44:01,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385357288] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:44:01,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125433737] [2022-07-22 12:44:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:44:01,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:44:01,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:44:01,435 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:44:01,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 12:44:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:44:01,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 12:44:01,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:44:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 1135 proven. 219 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2022-07-22 12:44:03,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:44:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 1135 proven. 219 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2022-07-22 12:44:05,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125433737] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 12:44:05,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 12:44:05,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-07-22 12:44:05,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931021119] [2022-07-22 12:44:05,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 12:44:05,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:44:05,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:44:05,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:44:05,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:44:05,910 INFO L87 Difference]: Start difference. First operand 12058 states and 12335 transitions. Second operand has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states 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 12:44:07,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:44:07,222 INFO L93 Difference]: Finished difference Result 13115 states and 13417 transitions. [2022-07-22 12:44:07,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 12:44:07,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 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 1074 [2022-07-22 12:44:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:44:07,236 INFO L225 Difference]: With dead ends: 13115 [2022-07-22 12:44:07,236 INFO L226 Difference]: Without dead ends: 13113 [2022-07-22 12:44:07,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2152 GetRequests, 2147 SyntacticMatches, 2 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 12:44:07,240 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 177 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:44:07,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 55 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1399 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 12:44:07,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13113 states. [2022-07-22 12:44:07,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13113 to 11759. [2022-07-22 12:44:07,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11759 states, 11758 states have (on average 1.0232182343936043) internal successors, (12031), 11758 states have internal predecessors, (12031), 0 states have call successors, (0), 0 states 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 12:44:07,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 12031 transitions. [2022-07-22 12:44:07,357 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 12031 transitions. Word has length 1074 [2022-07-22 12:44:07,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:44:07,358 INFO L495 AbstractCegarLoop]: Abstraction has 11759 states and 12031 transitions. [2022-07-22 12:44:07,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states 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 12:44:07,358 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 12031 transitions. [2022-07-22 12:44:07,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1088 [2022-07-22 12:44:07,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:44:07,371 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:44:07,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 12:44:07,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-22 12:44:07,588 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:44:07,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:44:07,589 INFO L85 PathProgramCache]: Analyzing trace with hash -183530912, now seen corresponding path program 1 times [2022-07-22 12:44:07,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:44:07,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029060494] [2022-07-22 12:44:07,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:44:07,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:44:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:44:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1917 backedges. 1509 proven. 26 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-07-22 12:44:07,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:44:07,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029060494] [2022-07-22 12:44:07,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029060494] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:44:07,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008609311] [2022-07-22 12:44:07,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:44:07,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:44:07,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:44:07,976 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:44:07,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 12:44:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:44:08,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 12:44:08,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:44:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1917 backedges. 1014 proven. 0 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-07-22 12:44:10,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:44:10,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008609311] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:44:10,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:44:10,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-22 12:44:10,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742282651] [2022-07-22 12:44:10,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:44:10,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:44:10,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:44:10,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:44:10,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:44:10,788 INFO L87 Difference]: Start difference. First operand 11759 states and 12031 transitions. Second operand has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states 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 12:44:10,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:44:10,832 INFO L93 Difference]: Finished difference Result 12245 states and 12527 transitions. [2022-07-22 12:44:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:44:10,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 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 1087 [2022-07-22 12:44:10,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:44:10,842 INFO L225 Difference]: With dead ends: 12245 [2022-07-22 12:44:10,842 INFO L226 Difference]: Without dead ends: 12243 [2022-07-22 12:44:10,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 1086 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:44:10,844 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 630 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:44:10,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 438 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 630 Unchecked, 0.0s Time] [2022-07-22 12:44:10,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12243 states. [2022-07-22 12:44:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12243 to 12001. [2022-07-22 12:44:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12001 states, 12000 states have (on average 1.0233333333333334) internal successors, (12280), 12000 states have internal predecessors, (12280), 0 states have call successors, (0), 0 states 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 12:44:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12001 states to 12001 states and 12280 transitions. [2022-07-22 12:44:10,957 INFO L78 Accepts]: Start accepts. Automaton has 12001 states and 12280 transitions. Word has length 1087 [2022-07-22 12:44:10,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:44:10,958 INFO L495 AbstractCegarLoop]: Abstraction has 12001 states and 12280 transitions. [2022-07-22 12:44:10,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states 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 12:44:10,958 INFO L276 IsEmpty]: Start isEmpty. Operand 12001 states and 12280 transitions. [2022-07-22 12:44:10,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1090 [2022-07-22 12:44:10,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:44:10,971 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:44:10,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 12:44:11,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 12:44:11,188 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:44:11,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:44:11,188 INFO L85 PathProgramCache]: Analyzing trace with hash -930646812, now seen corresponding path program 1 times [2022-07-22 12:44:11,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:44:11,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020276261] [2022-07-22 12:44:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:44:11,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:44:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:44:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1988 backedges. 1272 proven. 0 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2022-07-22 12:44:11,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:44:11,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020276261] [2022-07-22 12:44:11,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020276261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:44:11,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:44:11,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:44:11,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763327748] [2022-07-22 12:44:11,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:44:11,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:44:11,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:44:11,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:44:11,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:44:11,530 INFO L87 Difference]: Start difference. First operand 12001 states and 12280 transitions. Second operand has 4 states, 4 states have (on average 142.75) internal successors, (571), 4 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 12:44:12,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:44:12,721 INFO L93 Difference]: Finished difference Result 18953 states and 19392 transitions. [2022-07-22 12:44:12,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:44:12,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 142.75) internal successors, (571), 4 states have internal predecessors, (571), 0 states have call successors, (0), 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 1089 [2022-07-22 12:44:12,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:44:12,738 INFO L225 Difference]: With dead ends: 18953 [2022-07-22 12:44:12,738 INFO L226 Difference]: Without dead ends: 18951 [2022-07-22 12:44:12,743 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 12:44:12,743 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 369 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:44:12,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 77 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 12:44:12,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18951 states. [2022-07-22 12:44:12,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18951 to 12603. [2022-07-22 12:44:12,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12603 states, 12602 states have (on average 1.024202507538486) internal successors, (12907), 12602 states have internal predecessors, (12907), 0 states have call successors, (0), 0 states 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 12:44:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12603 states to 12603 states and 12907 transitions. [2022-07-22 12:44:12,877 INFO L78 Accepts]: Start accepts. Automaton has 12603 states and 12907 transitions. Word has length 1089 [2022-07-22 12:44:12,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:44:12,877 INFO L495 AbstractCegarLoop]: Abstraction has 12603 states and 12907 transitions. [2022-07-22 12:44:12,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 142.75) internal successors, (571), 4 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 12:44:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 12603 states and 12907 transitions. [2022-07-22 12:44:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1186 [2022-07-22 12:44:12,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:44:12,892 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:44:12,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-22 12:44:12,892 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:44:12,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:44:12,892 INFO L85 PathProgramCache]: Analyzing trace with hash 375105591, now seen corresponding path program 1 times [2022-07-22 12:44:12,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:44:12,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114673534] [2022-07-22 12:44:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:44:12,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:44:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:44:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 254 proven. 1108 refuted. 0 times theorem prover too weak. 859 trivial. 0 not checked. [2022-07-22 12:44:13,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:44:13,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114673534] [2022-07-22 12:44:13,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114673534] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:44:13,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596584262] [2022-07-22 12:44:13,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:44:13,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:44:13,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:44:13,308 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:44:13,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 12:44:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:44:13,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 1359 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:44:13,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:44:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 1439 proven. 0 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2022-07-22 12:44:14,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:44:14,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596584262] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:44:14,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:44:14,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-22 12:44:14,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895695787] [2022-07-22 12:44:14,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:44:14,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:44:14,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:44:14,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:44:14,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:44:14,858 INFO L87 Difference]: Start difference. First operand 12603 states and 12907 transitions. Second operand has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states 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 12:44:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:44:14,917 INFO L93 Difference]: Finished difference Result 25033 states and 25644 transitions. [2022-07-22 12:44:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:44:14,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 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 1185 [2022-07-22 12:44:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:44:14,925 INFO L225 Difference]: With dead ends: 25033 [2022-07-22 12:44:14,925 INFO L226 Difference]: Without dead ends: 12731 [2022-07-22 12:44:14,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1188 GetRequests, 1184 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:44:14,931 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 514 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:44:14,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 429 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 514 Unchecked, 0.0s Time] [2022-07-22 12:44:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12731 states. [2022-07-22 12:44:15,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12731 to 12731. [2022-07-22 12:44:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12731 states, 12730 states have (on average 1.0242733699921445) internal successors, (13039), 12730 states have internal predecessors, (13039), 0 states have call successors, (0), 0 states 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 12:44:15,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12731 states to 12731 states and 13039 transitions. [2022-07-22 12:44:15,042 INFO L78 Accepts]: Start accepts. Automaton has 12731 states and 13039 transitions. Word has length 1185 [2022-07-22 12:44:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:44:15,042 INFO L495 AbstractCegarLoop]: Abstraction has 12731 states and 13039 transitions. [2022-07-22 12:44:15,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states 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 12:44:15,043 INFO L276 IsEmpty]: Start isEmpty. Operand 12731 states and 13039 transitions. [2022-07-22 12:44:15,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1214 [2022-07-22 12:44:15,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:44:15,061 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:44:15,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 12:44:15,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:44:15,262 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:44:15,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:44:15,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1690605621, now seen corresponding path program 1 times [2022-07-22 12:44:15,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:44:15,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381049090] [2022-07-22 12:44:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:44:15,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:44:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:44:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2333 backedges. 1135 proven. 0 refuted. 0 times theorem prover too weak. 1198 trivial. 0 not checked. [2022-07-22 12:44:15,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:44:15,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381049090] [2022-07-22 12:44:15,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381049090] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:44:15,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:44:15,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 12:44:15,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333688537] [2022-07-22 12:44:15,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:44:15,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 12:44:15,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:44:15,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 12:44:15,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:44:15,714 INFO L87 Difference]: Start difference. First operand 12731 states and 13039 transitions. Second operand has 5 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 12:44:17,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:44:17,084 INFO L93 Difference]: Finished difference Result 27665 states and 28359 transitions. [2022-07-22 12:44:17,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 12:44:17,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 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 1213 [2022-07-22 12:44:17,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:44:17,099 INFO L225 Difference]: With dead ends: 27665 [2022-07-22 12:44:17,099 INFO L226 Difference]: Without dead ends: 15235 [2022-07-22 12:44:17,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 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 12:44:17,107 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 465 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:44:17,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 528 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 12:44:17,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15235 states. [2022-07-22 12:44:17,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15235 to 13622. [2022-07-22 12:44:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13622 states, 13621 states have (on average 1.021731150429484) internal successors, (13917), 13621 states have internal predecessors, (13917), 0 states have call successors, (0), 0 states 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 12:44:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13622 states to 13622 states and 13917 transitions. [2022-07-22 12:44:17,240 INFO L78 Accepts]: Start accepts. Automaton has 13622 states and 13917 transitions. Word has length 1213 [2022-07-22 12:44:17,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:44:17,241 INFO L495 AbstractCegarLoop]: Abstraction has 13622 states and 13917 transitions. [2022-07-22 12:44:17,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 12:44:17,241 INFO L276 IsEmpty]: Start isEmpty. Operand 13622 states and 13917 transitions. [2022-07-22 12:44:17,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1332 [2022-07-22 12:44:17,261 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:44:17,262 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-22 12:44:17,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-22 12:44:17,262 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:44:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:44:17,262 INFO L85 PathProgramCache]: Analyzing trace with hash -629429547, now seen corresponding path program 1 times [2022-07-22 12:44:17,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:44:17,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476499190] [2022-07-22 12:44:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:44:17,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:44:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:44:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2974 backedges. 2512 proven. 29 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2022-07-22 12:44:17,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:44:17,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476499190] [2022-07-22 12:44:17,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476499190] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:44:17,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78023847] [2022-07-22 12:44:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:44:17,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:44:17,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:44:17,732 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:44:17,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 12:44:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:44:18,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 1534 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 12:44:18,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:44:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2974 backedges. 1829 proven. 0 refuted. 0 times theorem prover too weak. 1145 trivial. 0 not checked. [2022-07-22 12:44:25,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:44:25,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78023847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:44:25,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:44:25,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-22 12:44:25,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265697071] [2022-07-22 12:44:25,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:44:25,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:44:25,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:44:25,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:44:25,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:44:25,497 INFO L87 Difference]: Start difference. First operand 13622 states and 13917 transitions. Second operand has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states 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 12:44:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:44:25,561 INFO L93 Difference]: Finished difference Result 14163 states and 14469 transitions. [2022-07-22 12:44:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:44:25,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 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 1331 [2022-07-22 12:44:25,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:44:25,574 INFO L225 Difference]: With dead ends: 14163 [2022-07-22 12:44:25,574 INFO L226 Difference]: Without dead ends: 14161 [2022-07-22 12:44:25,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1335 GetRequests, 1330 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:44:25,577 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 677 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:44:25,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 434 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 677 Unchecked, 0.0s Time] [2022-07-22 12:44:25,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14161 states. [2022-07-22 12:44:25,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14161 to 13624. [2022-07-22 12:44:25,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13624 states, 13623 states have (on average 1.0218013653380313) internal successors, (13920), 13623 states have internal predecessors, (13920), 0 states have call successors, (0), 0 states 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 12:44:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13624 states to 13624 states and 13920 transitions. [2022-07-22 12:44:25,720 INFO L78 Accepts]: Start accepts. Automaton has 13624 states and 13920 transitions. Word has length 1331 [2022-07-22 12:44:25,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:44:25,720 INFO L495 AbstractCegarLoop]: Abstraction has 13624 states and 13920 transitions. [2022-07-22 12:44:25,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states 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 12:44:25,720 INFO L276 IsEmpty]: Start isEmpty. Operand 13624 states and 13920 transitions. [2022-07-22 12:44:25,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1387 [2022-07-22 12:44:25,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:44:25,741 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:44:25,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-22 12:44:25,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-22 12:44:25,942 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:44:25,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:44:25,942 INFO L85 PathProgramCache]: Analyzing trace with hash -361330921, now seen corresponding path program 1 times [2022-07-22 12:44:25,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:44:25,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865938236] [2022-07-22 12:44:25,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:44:25,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:44:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:44:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3001 backedges. 2351 proven. 52 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2022-07-22 12:44:26,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:44:26,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865938236] [2022-07-22 12:44:26,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865938236] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:44:26,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405534621] [2022-07-22 12:44:26,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:44:26,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:44:26,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:44:26,443 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:44:26,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 12:44:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:44:26,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 12:44:26,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:44:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3001 backedges. 2354 proven. 265 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-07-22 12:44:37,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:44:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3001 backedges. 2105 proven. 514 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-07-22 12:44:50,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405534621] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 12:44:50,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 12:44:50,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 14] total 23 [2022-07-22 12:44:50,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74421673] [2022-07-22 12:44:50,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 12:44:50,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 12:44:50,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:44:50,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 12:44:50,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2022-07-22 12:44:50,542 INFO L87 Difference]: Start difference. First operand 13624 states and 13920 transitions. Second operand has 23 states, 23 states have (on average 87.65217391304348) internal successors, (2016), 23 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states 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 12:45:00,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:45:00,239 INFO L93 Difference]: Finished difference Result 34470 states and 35223 transitions. [2022-07-22 12:45:00,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 12:45:00,240 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 87.65217391304348) internal successors, (2016), 23 states have internal predecessors, (2016), 0 states have call successors, (0), 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 1386 [2022-07-22 12:45:00,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:45:00,259 INFO L225 Difference]: With dead ends: 34470 [2022-07-22 12:45:00,259 INFO L226 Difference]: Without dead ends: 20790 [2022-07-22 12:45:00,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2827 GetRequests, 2772 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=849, Invalid=2121, Unknown=0, NotChecked=0, Total=2970 [2022-07-22 12:45:00,270 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 6740 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 13860 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6740 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 14348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 13860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:45:00,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6740 Valid, 293 Invalid, 14348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 13860 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-07-22 12:45:00,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20790 states. [2022-07-22 12:45:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20790 to 13049. [2022-07-22 12:45:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13049 states, 13048 states have (on average 1.0196965052115268) internal successors, (13305), 13048 states have internal predecessors, (13305), 0 states have call successors, (0), 0 states 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 12:45:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13049 states to 13049 states and 13305 transitions. [2022-07-22 12:45:00,426 INFO L78 Accepts]: Start accepts. Automaton has 13049 states and 13305 transitions. Word has length 1386 [2022-07-22 12:45:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:45:00,427 INFO L495 AbstractCegarLoop]: Abstraction has 13049 states and 13305 transitions. [2022-07-22 12:45:00,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 87.65217391304348) internal successors, (2016), 23 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states 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 12:45:00,427 INFO L276 IsEmpty]: Start isEmpty. Operand 13049 states and 13305 transitions. [2022-07-22 12:45:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1485 [2022-07-22 12:45:00,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:45:00,446 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 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] [2022-07-22 12:45:00,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 12:45:00,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:45:00,648 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:45:00,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:45:00,649 INFO L85 PathProgramCache]: Analyzing trace with hash 794020182, now seen corresponding path program 1 times [2022-07-22 12:45:00,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:45:00,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464174560] [2022-07-22 12:45:00,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:45:00,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:45:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:45:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 305 proven. 1867 refuted. 0 times theorem prover too weak. 1229 trivial. 0 not checked. [2022-07-22 12:45:01,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:45:01,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464174560] [2022-07-22 12:45:01,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464174560] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:45:01,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638166813] [2022-07-22 12:45:01,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:45:01,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:45:01,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:45:01,159 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:45:01,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 12:45:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:45:01,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 1677 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 12:45:01,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:45:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 2491 proven. 128 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2022-07-22 12:45:15,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:45:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 2551 proven. 68 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2022-07-22 12:45:22,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638166813] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 12:45:22,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 12:45:22,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 12] total 21 [2022-07-22 12:45:22,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823823085] [2022-07-22 12:45:22,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 12:45:22,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 12:45:22,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:45:22,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 12:45:22,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2022-07-22 12:45:22,653 INFO L87 Difference]: Start difference. First operand 13049 states and 13305 transitions. Second operand has 21 states, 21 states have (on average 92.28571428571429) internal successors, (1938), 21 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states 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 12:45:30,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:45:30,026 INFO L93 Difference]: Finished difference Result 34412 states and 35075 transitions. [2022-07-22 12:45:30,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 12:45:30,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 92.28571428571429) internal successors, (1938), 21 states have internal predecessors, (1938), 0 states have call successors, (0), 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 1484 [2022-07-22 12:45:30,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:45:30,028 INFO L225 Difference]: With dead ends: 34412 [2022-07-22 12:45:30,028 INFO L226 Difference]: Without dead ends: 0 [2022-07-22 12:45:30,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3000 GetRequests, 2962 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=417, Invalid=1065, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 12:45:30,037 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 7813 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 11018 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7813 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 11348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 11018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:45:30,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7813 Valid, 261 Invalid, 11348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 11018 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-07-22 12:45:30,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-22 12:45:30,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-22 12:45:30,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:45:30,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-22 12:45:30,038 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1484 [2022-07-22 12:45:30,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:45:30,038 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 12:45:30,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 92.28571428571429) internal successors, (1938), 21 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states 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 12:45:30,038 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-22 12:45:30,038 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-22 12:45:30,040 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 12:45:30,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 12:45:30,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-22 12:45:30,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-22 12:45:35,648 WARN L233 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 482 DAG size of output: 468 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-07-22 12:46:56,397 WARN L233 SmtUtils]: Spent 1.35m on a formula simplification. DAG size of input: 859 DAG size of output: 830 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)