./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-14 01:38:47,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 01:38:47,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 01:38:47,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 01:38:47,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 01:38:47,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 01:38:47,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 01:38:47,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 01:38:47,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 01:38:47,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 01:38:47,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 01:38:47,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 01:38:47,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 01:38:47,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 01:38:47,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 01:38:47,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 01:38:47,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 01:38:47,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 01:38:47,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 01:38:47,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 01:38:47,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 01:38:47,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 01:38:47,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 01:38:47,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 01:38:47,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 01:38:47,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 01:38:47,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 01:38:47,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 01:38:47,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 01:38:47,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 01:38:47,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 01:38:47,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 01:38:47,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 01:38:47,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 01:38:47,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 01:38:47,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 01:38:47,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 01:38:47,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 01:38:47,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 01:38:47,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 01:38:47,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 01:38:47,981 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-14 01:38:48,013 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 01:38:48,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 01:38:48,014 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 01:38:48,014 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 01:38:48,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 01:38:48,015 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 01:38:48,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 01:38:48,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 01:38:48,016 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 01:38:48,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 01:38:48,016 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 01:38:48,017 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-14 01:38:48,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 01:38:48,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 01:38:48,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 01:38:48,017 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-14 01:38:48,017 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-14 01:38:48,018 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-14 01:38:48,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 01:38:48,018 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-14 01:38:48,018 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 01:38:48,018 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 01:38:48,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 01:38:48,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 01:38:48,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 01:38:48,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 01:38:48,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 01:38:48,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 01:38:48,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 01:38:48,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 01:38:48,020 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 01:38:48,020 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 01:38:48,020 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 01:38:48,020 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 01:38:48,021 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a [2023-02-14 01:38:48,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 01:38:48,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 01:38:48,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 01:38:48,279 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 01:38:48,279 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 01:38:48,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2023-02-14 01:38:49,524 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 01:38:49,746 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 01:38:49,746 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2023-02-14 01:38:49,756 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2485c2f7/cc74bebe4e3e4ff198eddf5676367892/FLAG569a0fa25 [2023-02-14 01:38:49,770 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2485c2f7/cc74bebe4e3e4ff198eddf5676367892 [2023-02-14 01:38:49,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 01:38:49,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 01:38:49,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 01:38:49,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 01:38:49,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 01:38:49,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:38:49" (1/1) ... [2023-02-14 01:38:49,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4967b01e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:38:49, skipping insertion in model container [2023-02-14 01:38:49,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:38:49" (1/1) ... [2023-02-14 01:38:49,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 01:38:49,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 01:38:50,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 01:38:50,106 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 01:38:50,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 01:38:50,174 INFO L208 MainTranslator]: Completed translation [2023-02-14 01:38:50,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:38:50 WrapperNode [2023-02-14 01:38:50,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 01:38:50,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 01:38:50,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 01:38:50,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 01:38:50,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:38:50" (1/1) ... [2023-02-14 01:38:50,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:38:50" (1/1) ... [2023-02-14 01:38:50,216 INFO L138 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 100 [2023-02-14 01:38:50,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 01:38:50,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 01:38:50,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 01:38:50,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 01:38:50,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:38:50" (1/1) ... [2023-02-14 01:38:50,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:38:50" (1/1) ... [2023-02-14 01:38:50,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:38:50" (1/1) ... [2023-02-14 01:38:50,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:38:50" (1/1) ... [2023-02-14 01:38:50,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:38:50" (1/1) ... [2023-02-14 01:38:50,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:38:50" (1/1) ... [2023-02-14 01:38:50,259 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:38:50" (1/1) ... [2023-02-14 01:38:50,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:38:50" (1/1) ... [2023-02-14 01:38:50,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 01:38:50,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 01:38:50,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 01:38:50,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 01:38:50,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:38:50" (1/1) ... [2023-02-14 01:38:50,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 01:38:50,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:38:50,298 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) [2023-02-14 01:38:50,300 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 [2023-02-14 01:38:50,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 01:38:50,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 01:38:50,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 01:38:50,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 01:38:50,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 01:38:50,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 01:38:50,451 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 01:38:50,452 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 01:38:50,648 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 01:38:50,654 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 01:38:50,654 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-14 01:38:50,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:38:50 BoogieIcfgContainer [2023-02-14 01:38:50,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 01:38:50,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 01:38:50,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 01:38:50,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 01:38:50,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:38:49" (1/3) ... [2023-02-14 01:38:50,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68af1b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:38:50, skipping insertion in model container [2023-02-14 01:38:50,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:38:50" (2/3) ... [2023-02-14 01:38:50,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68af1b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:38:50, skipping insertion in model container [2023-02-14 01:38:50,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:38:50" (3/3) ... [2023-02-14 01:38:50,689 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlcpy-alloca-1.i [2023-02-14 01:38:50,705 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 01:38:50,705 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-02-14 01:38:50,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 01:38:50,751 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5e3d942d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 01:38:50,751 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-02-14 01:38:50,754 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 50 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:50,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-14 01:38:50,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:50,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:50,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:50,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2023-02-14 01:38:50,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:50,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194092428] [2023-02-14 01:38:50,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:50,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:51,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:51,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:51,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194092428] [2023-02-14 01:38:51,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194092428] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:51,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:51,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 01:38:51,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322029700] [2023-02-14 01:38:51,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:51,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 01:38:51,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:51,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 01:38:51,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:38:51,134 INFO L87 Difference]: Start difference. First operand has 51 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 50 states have internal predecessors, (64), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:51,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:51,204 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2023-02-14 01:38:51,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 01:38:51,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-02-14 01:38:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:51,214 INFO L225 Difference]: With dead ends: 94 [2023-02-14 01:38:51,215 INFO L226 Difference]: Without dead ends: 90 [2023-02-14 01:38:51,216 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 [2023-02-14 01:38:51,219 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 48 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:51,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 157 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:51,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-14 01:38:51,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 52. [2023-02-14 01:38:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:51,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2023-02-14 01:38:51,252 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 7 [2023-02-14 01:38:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:51,252 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2023-02-14 01:38:51,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2023-02-14 01:38:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-14 01:38:51,253 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:51,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:51,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 01:38:51,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:51,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:51,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2023-02-14 01:38:51,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:51,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050222489] [2023-02-14 01:38:51,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:51,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:51,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:51,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050222489] [2023-02-14 01:38:51,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050222489] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:51,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:51,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 01:38:51,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867133535] [2023-02-14 01:38:51,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:51,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 01:38:51,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:51,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 01:38:51,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:38:51,581 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:51,717 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2023-02-14 01:38:51,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 01:38:51,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-02-14 01:38:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:51,721 INFO L225 Difference]: With dead ends: 95 [2023-02-14 01:38:51,721 INFO L226 Difference]: Without dead ends: 95 [2023-02-14 01:38:51,721 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 [2023-02-14 01:38:51,724 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 142 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:51,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 69 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:38:51,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-14 01:38:51,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 50. [2023-02-14 01:38:51,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-02-14 01:38:51,757 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 7 [2023-02-14 01:38:51,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:51,757 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-02-14 01:38:51,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-02-14 01:38:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-14 01:38:51,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:51,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:51,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 01:38:51,761 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:51,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:51,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2023-02-14 01:38:51,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:51,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903978213] [2023-02-14 01:38:51,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:51,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:51,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:51,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903978213] [2023-02-14 01:38:51,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903978213] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:51,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:51,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 01:38:51,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905588640] [2023-02-14 01:38:51,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:51,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 01:38:51,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:51,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 01:38:51,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:38:51,954 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:52,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:52,055 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2023-02-14 01:38:52,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 01:38:52,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-02-14 01:38:52,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:52,059 INFO L225 Difference]: With dead ends: 91 [2023-02-14 01:38:52,059 INFO L226 Difference]: Without dead ends: 91 [2023-02-14 01:38:52,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-14 01:38:52,067 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 147 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:52,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 98 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:38:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-14 01:38:52,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 52. [2023-02-14 01:38:52,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2023-02-14 01:38:52,077 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 7 [2023-02-14 01:38:52,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:52,077 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2023-02-14 01:38:52,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:52,077 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2023-02-14 01:38:52,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 01:38:52,078 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:52,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:52,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 01:38:52,078 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:52,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:52,079 INFO L85 PathProgramCache]: Analyzing trace with hash -533876961, now seen corresponding path program 1 times [2023-02-14 01:38:52,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:52,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480428986] [2023-02-14 01:38:52,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:52,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:52,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:52,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480428986] [2023-02-14 01:38:52,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480428986] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:52,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:52,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 01:38:52,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097442943] [2023-02-14 01:38:52,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:52,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 01:38:52,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:52,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 01:38:52,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 01:38:52,164 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:52,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:52,186 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2023-02-14 01:38:52,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 01:38:52,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-02-14 01:38:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:52,188 INFO L225 Difference]: With dead ends: 50 [2023-02-14 01:38:52,188 INFO L226 Difference]: Without dead ends: 50 [2023-02-14 01:38:52,188 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 [2023-02-14 01:38:52,195 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:52,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 42 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:52,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-14 01:38:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-14 01:38:52,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2023-02-14 01:38:52,204 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 9 [2023-02-14 01:38:52,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:52,205 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2023-02-14 01:38:52,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2023-02-14 01:38:52,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 01:38:52,205 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:52,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:52,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 01:38:52,206 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:52,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:52,207 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2023-02-14 01:38:52,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:52,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898105819] [2023-02-14 01:38:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:52,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:52,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:52,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898105819] [2023-02-14 01:38:52,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898105819] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:52,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:52,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 01:38:52,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241615792] [2023-02-14 01:38:52,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:52,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 01:38:52,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:52,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 01:38:52,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:38:52,348 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:52,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:52,404 INFO L93 Difference]: Finished difference Result 94 states and 113 transitions. [2023-02-14 01:38:52,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 01:38:52,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-02-14 01:38:52,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:52,406 INFO L225 Difference]: With dead ends: 94 [2023-02-14 01:38:52,406 INFO L226 Difference]: Without dead ends: 94 [2023-02-14 01:38:52,406 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 [2023-02-14 01:38:52,408 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 86 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:52,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 80 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:52,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-14 01:38:52,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2023-02-14 01:38:52,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 64 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2023-02-14 01:38:52,429 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 9 [2023-02-14 01:38:52,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:52,429 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2023-02-14 01:38:52,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2023-02-14 01:38:52,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 01:38:52,431 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:52,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:52,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 01:38:52,431 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:52,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:52,432 INFO L85 PathProgramCache]: Analyzing trace with hash -533876907, now seen corresponding path program 1 times [2023-02-14 01:38:52,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:52,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656038601] [2023-02-14 01:38:52,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:52,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:52,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:52,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656038601] [2023-02-14 01:38:52,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656038601] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:52,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:52,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 01:38:52,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739428082] [2023-02-14 01:38:52,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:52,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 01:38:52,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:52,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 01:38:52,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:38:52,473 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:52,491 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2023-02-14 01:38:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 01:38:52,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-02-14 01:38:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:52,493 INFO L225 Difference]: With dead ends: 90 [2023-02-14 01:38:52,493 INFO L226 Difference]: Without dead ends: 90 [2023-02-14 01:38:52,493 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 [2023-02-14 01:38:52,494 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 73 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:52,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 101 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-14 01:38:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2023-02-14 01:38:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:52,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2023-02-14 01:38:52,500 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 9 [2023-02-14 01:38:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:52,500 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2023-02-14 01:38:52,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:52,501 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2023-02-14 01:38:52,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 01:38:52,502 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:52,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:52,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-14 01:38:52,502 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:52,503 INFO L85 PathProgramCache]: Analyzing trace with hash -476618658, now seen corresponding path program 1 times [2023-02-14 01:38:52,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:52,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726977844] [2023-02-14 01:38:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:52,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:52,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:52,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726977844] [2023-02-14 01:38:52,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726977844] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:52,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:52,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 01:38:52,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951456204] [2023-02-14 01:38:52,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:52,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 01:38:52,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:52,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 01:38:52,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-02-14 01:38:52,736 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:52,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:52,809 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2023-02-14 01:38:52,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 01:38:52,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-02-14 01:38:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:52,810 INFO L225 Difference]: With dead ends: 95 [2023-02-14 01:38:52,810 INFO L226 Difference]: Without dead ends: 95 [2023-02-14 01:38:52,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-02-14 01:38:52,812 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 162 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:52,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 67 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:38:52,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-14 01:38:52,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2023-02-14 01:38:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.56) internal successors, (78), 62 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2023-02-14 01:38:52,824 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 9 [2023-02-14 01:38:52,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:52,825 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2023-02-14 01:38:52,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:52,825 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2023-02-14 01:38:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 01:38:52,826 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:52,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:52,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-14 01:38:52,826 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:52,827 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2023-02-14 01:38:52,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:52,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709083432] [2023-02-14 01:38:52,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:52,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:52,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:52,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:52,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709083432] [2023-02-14 01:38:52,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709083432] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:52,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:52,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 01:38:52,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494555921] [2023-02-14 01:38:52,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:52,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 01:38:52,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:52,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 01:38:52,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-14 01:38:52,989 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:53,071 INFO L93 Difference]: Finished difference Result 93 states and 113 transitions. [2023-02-14 01:38:53,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 01:38:53,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-02-14 01:38:53,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:53,072 INFO L225 Difference]: With dead ends: 93 [2023-02-14 01:38:53,072 INFO L226 Difference]: Without dead ends: 93 [2023-02-14 01:38:53,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-14 01:38:53,074 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 123 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:53,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 90 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:38:53,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-14 01:38:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 64. [2023-02-14 01:38:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 63 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2023-02-14 01:38:53,080 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 9 [2023-02-14 01:38:53,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:53,080 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2023-02-14 01:38:53,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:53,081 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2023-02-14 01:38:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-14 01:38:53,082 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:53,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:53,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-14 01:38:53,084 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:53,085 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2023-02-14 01:38:53,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:53,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004154690] [2023-02-14 01:38:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:53,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:53,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:53,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004154690] [2023-02-14 01:38:53,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004154690] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:53,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:53,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 01:38:53,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986632312] [2023-02-14 01:38:53,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:53,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 01:38:53,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:53,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 01:38:53,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:38:53,162 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:53,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:53,219 INFO L93 Difference]: Finished difference Result 103 states and 125 transitions. [2023-02-14 01:38:53,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 01:38:53,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-02-14 01:38:53,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:53,220 INFO L225 Difference]: With dead ends: 103 [2023-02-14 01:38:53,221 INFO L226 Difference]: Without dead ends: 103 [2023-02-14 01:38:53,221 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 [2023-02-14 01:38:53,223 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 38 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:53,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 115 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:38:53,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-14 01:38:53,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2023-02-14 01:38:53,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 63 states have (on average 1.507936507936508) internal successors, (95), 75 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:53,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2023-02-14 01:38:53,226 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 10 [2023-02-14 01:38:53,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:53,226 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2023-02-14 01:38:53,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:53,227 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2023-02-14 01:38:53,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-14 01:38:53,228 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:53,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:53,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-14 01:38:53,229 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:53,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:53,229 INFO L85 PathProgramCache]: Analyzing trace with hash -179663208, now seen corresponding path program 1 times [2023-02-14 01:38:53,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:53,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456728073] [2023-02-14 01:38:53,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:53,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:53,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:53,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456728073] [2023-02-14 01:38:53,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456728073] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:53,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:53,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 01:38:53,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538240323] [2023-02-14 01:38:53,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:53,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 01:38:53,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:53,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 01:38:53,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:38:53,363 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:53,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:53,439 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2023-02-14 01:38:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 01:38:53,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-02-14 01:38:53,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:53,440 INFO L225 Difference]: With dead ends: 119 [2023-02-14 01:38:53,440 INFO L226 Difference]: Without dead ends: 119 [2023-02-14 01:38:53,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:38:53,441 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 89 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:53,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 95 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:38:53,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-14 01:38:53,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 76. [2023-02-14 01:38:53,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 63 states have (on average 1.507936507936508) internal successors, (95), 75 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2023-02-14 01:38:53,445 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 10 [2023-02-14 01:38:53,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:53,445 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2023-02-14 01:38:53,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:53,445 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2023-02-14 01:38:53,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-14 01:38:53,449 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:53,449 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:53,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-14 01:38:53,449 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:53,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:53,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2023-02-14 01:38:53,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:53,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324372335] [2023-02-14 01:38:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:53,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:53,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:53,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324372335] [2023-02-14 01:38:53,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324372335] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:38:53,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871552281] [2023-02-14 01:38:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:53,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:38:53,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:38:53,644 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) [2023-02-14 01:38:53,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 01:38:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:53,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 01:38:53,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:38:53,842 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-02-14 01:38:53,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2023-02-14 01:38:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:54,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:38:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:54,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871552281] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:38:54,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:38:54,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-02-14 01:38:54,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177203489] [2023-02-14 01:38:54,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:38:54,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 01:38:54,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:54,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 01:38:54,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-02-14 01:38:54,232 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:54,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:54,547 INFO L93 Difference]: Finished difference Result 148 states and 178 transitions. [2023-02-14 01:38:54,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 01:38:54,549 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 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 11 [2023-02-14 01:38:54,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:54,550 INFO L225 Difference]: With dead ends: 148 [2023-02-14 01:38:54,550 INFO L226 Difference]: Without dead ends: 148 [2023-02-14 01:38:54,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2023-02-14 01:38:54,550 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 317 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:54,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 423 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 01:38:54,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-14 01:38:54,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 73. [2023-02-14 01:38:54,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 72 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2023-02-14 01:38:54,553 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 11 [2023-02-14 01:38:54,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:54,553 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2023-02-14 01:38:54,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2023-02-14 01:38:54,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-14 01:38:54,554 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:54,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:54,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 01:38:54,762 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,SelfDestructingSolverStorable10 [2023-02-14 01:38:54,762 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:54,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:54,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804959, now seen corresponding path program 1 times [2023-02-14 01:38:54,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:54,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973794458] [2023-02-14 01:38:54,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:54,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:54,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:54,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973794458] [2023-02-14 01:38:54,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973794458] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:54,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:54,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 01:38:54,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347524551] [2023-02-14 01:38:54,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:54,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 01:38:54,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:54,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 01:38:54,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-14 01:38:54,962 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:54,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:54,999 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2023-02-14 01:38:54,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 01:38:55,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-14 01:38:55,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:55,001 INFO L225 Difference]: With dead ends: 72 [2023-02-14 01:38:55,002 INFO L226 Difference]: Without dead ends: 72 [2023-02-14 01:38:55,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-14 01:38:55,003 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 110 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:55,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 42 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:55,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-14 01:38:55,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2023-02-14 01:38:55,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 59 states have (on average 1.4745762711864407) internal successors, (87), 69 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2023-02-14 01:38:55,007 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 13 [2023-02-14 01:38:55,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:55,007 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2023-02-14 01:38:55,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:55,007 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2023-02-14 01:38:55,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-14 01:38:55,008 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:55,008 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:55,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-14 01:38:55,009 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:55,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:55,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2023-02-14 01:38:55,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:55,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399128146] [2023-02-14 01:38:55,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:55,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:55,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:55,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399128146] [2023-02-14 01:38:55,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399128146] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:38:55,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495715734] [2023-02-14 01:38:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:55,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:38:55,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:38:55,191 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) [2023-02-14 01:38:55,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 01:38:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:55,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 01:38:55,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:38:55,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 01:38:55,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-14 01:38:55,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 01:38:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:55,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:38:55,586 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 01:38:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:55,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495715734] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:38:55,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:38:55,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-02-14 01:38:55,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225515104] [2023-02-14 01:38:55,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:38:55,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 01:38:55,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:55,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 01:38:55,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-02-14 01:38:55,603 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:55,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:55,872 INFO L93 Difference]: Finished difference Result 135 states and 163 transitions. [2023-02-14 01:38:55,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 01:38:55,873 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-14 01:38:55,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:55,874 INFO L225 Difference]: With dead ends: 135 [2023-02-14 01:38:55,874 INFO L226 Difference]: Without dead ends: 135 [2023-02-14 01:38:55,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2023-02-14 01:38:55,875 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 335 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:55,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 244 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:38:55,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-14 01:38:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 65. [2023-02-14 01:38:55,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 64 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2023-02-14 01:38:55,877 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 13 [2023-02-14 01:38:55,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:55,877 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2023-02-14 01:38:55,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2023-02-14 01:38:55,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 01:38:55,878 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:55,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:55,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 01:38:56,086 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,SelfDestructingSolverStorable12 [2023-02-14 01:38:56,086 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:56,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:56,087 INFO L85 PathProgramCache]: Analyzing trace with hash -115553675, now seen corresponding path program 1 times [2023-02-14 01:38:56,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:56,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784243829] [2023-02-14 01:38:56,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:56,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:56,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:56,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:56,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784243829] [2023-02-14 01:38:56,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784243829] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:38:56,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171618688] [2023-02-14 01:38:56,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:56,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:38:56,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:38:56,261 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) [2023-02-14 01:38:56,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 01:38:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:56,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 01:38:56,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:38:56,342 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-02-14 01:38:56,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2023-02-14 01:38:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:56,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:38:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:56,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171618688] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 01:38:56,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:38:56,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2023-02-14 01:38:56,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200688148] [2023-02-14 01:38:56,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:56,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 01:38:56,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:56,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 01:38:56,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2023-02-14 01:38:56,570 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:56,658 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2023-02-14 01:38:56,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 01:38:56,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2023-02-14 01:38:56,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:56,659 INFO L225 Difference]: With dead ends: 66 [2023-02-14 01:38:56,659 INFO L226 Difference]: Without dead ends: 66 [2023-02-14 01:38:56,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2023-02-14 01:38:56,659 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 122 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:56,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 49 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:56,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-14 01:38:56,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2023-02-14 01:38:56,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:56,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2023-02-14 01:38:56,661 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 14 [2023-02-14 01:38:56,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:56,661 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2023-02-14 01:38:56,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2023-02-14 01:38:56,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 01:38:56,662 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:56,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:56,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 01:38:56,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:38:56,863 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:56,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:56,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1062912840, now seen corresponding path program 1 times [2023-02-14 01:38:56,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:56,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941619242] [2023-02-14 01:38:56,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:56,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:56,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:56,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941619242] [2023-02-14 01:38:56,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941619242] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:56,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:56,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 01:38:56,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323523829] [2023-02-14 01:38:56,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:56,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 01:38:56,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:56,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 01:38:56,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-14 01:38:56,960 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:57,017 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2023-02-14 01:38:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 01:38:57,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-14 01:38:57,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:57,019 INFO L225 Difference]: With dead ends: 71 [2023-02-14 01:38:57,019 INFO L226 Difference]: Without dead ends: 71 [2023-02-14 01:38:57,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-14 01:38:57,020 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 184 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:57,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 76 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:57,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-14 01:38:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2023-02-14 01:38:57,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.489795918367347) internal successors, (73), 57 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2023-02-14 01:38:57,022 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 15 [2023-02-14 01:38:57,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:57,022 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2023-02-14 01:38:57,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,022 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2023-02-14 01:38:57,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 01:38:57,023 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:57,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:57,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-14 01:38:57,023 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:57,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:57,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1062912839, now seen corresponding path program 1 times [2023-02-14 01:38:57,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:57,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713272670] [2023-02-14 01:38:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:57,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:57,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:57,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713272670] [2023-02-14 01:38:57,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713272670] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:57,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:57,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 01:38:57,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218567916] [2023-02-14 01:38:57,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:57,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 01:38:57,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:57,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 01:38:57,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:38:57,058 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:57,082 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2023-02-14 01:38:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 01:38:57,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-14 01:38:57,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:57,084 INFO L225 Difference]: With dead ends: 57 [2023-02-14 01:38:57,084 INFO L226 Difference]: Without dead ends: 57 [2023-02-14 01:38:57,085 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 [2023-02-14 01:38:57,085 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 60 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:57,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 51 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-14 01:38:57,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-02-14 01:38:57,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 56 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2023-02-14 01:38:57,088 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 15 [2023-02-14 01:38:57,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:57,088 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2023-02-14 01:38:57,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,089 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2023-02-14 01:38:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 01:38:57,089 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:57,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:57,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-14 01:38:57,090 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:57,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1062113512, now seen corresponding path program 1 times [2023-02-14 01:38:57,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:57,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490684715] [2023-02-14 01:38:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:57,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:57,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:57,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490684715] [2023-02-14 01:38:57,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490684715] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:57,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:57,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 01:38:57,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881817246] [2023-02-14 01:38:57,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:57,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 01:38:57,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:57,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 01:38:57,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:38:57,155 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:57,193 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2023-02-14 01:38:57,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 01:38:57,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-14 01:38:57,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:57,194 INFO L225 Difference]: With dead ends: 56 [2023-02-14 01:38:57,194 INFO L226 Difference]: Without dead ends: 56 [2023-02-14 01:38:57,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-14 01:38:57,195 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 64 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:57,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 76 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:57,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-14 01:38:57,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-02-14 01:38:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 55 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2023-02-14 01:38:57,197 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 15 [2023-02-14 01:38:57,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:57,197 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2023-02-14 01:38:57,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,198 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2023-02-14 01:38:57,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 01:38:57,198 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:57,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:57,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-14 01:38:57,199 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:57,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:57,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1062113513, now seen corresponding path program 1 times [2023-02-14 01:38:57,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:57,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845695843] [2023-02-14 01:38:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:57,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:57,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:57,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845695843] [2023-02-14 01:38:57,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845695843] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:57,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:57,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 01:38:57,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468930259] [2023-02-14 01:38:57,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:57,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 01:38:57,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:57,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 01:38:57,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-14 01:38:57,334 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:57,440 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2023-02-14 01:38:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 01:38:57,441 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-14 01:38:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:57,441 INFO L225 Difference]: With dead ends: 79 [2023-02-14 01:38:57,441 INFO L226 Difference]: Without dead ends: 79 [2023-02-14 01:38:57,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-02-14 01:38:57,442 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 182 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:57,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 111 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:38:57,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-14 01:38:57,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2023-02-14 01:38:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.42) internal successors, (71), 56 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2023-02-14 01:38:57,444 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 15 [2023-02-14 01:38:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:57,444 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2023-02-14 01:38:57,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,444 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2023-02-14 01:38:57,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 01:38:57,445 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:57,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:57,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-14 01:38:57,445 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:57,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1408640871, now seen corresponding path program 1 times [2023-02-14 01:38:57,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:57,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898278807] [2023-02-14 01:38:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:57,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:57,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:57,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898278807] [2023-02-14 01:38:57,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898278807] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:57,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:57,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 01:38:57,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739506596] [2023-02-14 01:38:57,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:57,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 01:38:57,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:57,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 01:38:57,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 01:38:57,466 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:57,472 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2023-02-14 01:38:57,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 01:38:57,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-02-14 01:38:57,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:57,473 INFO L225 Difference]: With dead ends: 62 [2023-02-14 01:38:57,473 INFO L226 Difference]: Without dead ends: 62 [2023-02-14 01:38:57,473 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 [2023-02-14 01:38:57,474 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 14 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:57,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 82 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-14 01:38:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2023-02-14 01:38:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 51 states have (on average 1.411764705882353) internal successors, (72), 57 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2023-02-14 01:38:57,476 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 16 [2023-02-14 01:38:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:57,476 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2023-02-14 01:38:57,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2023-02-14 01:38:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 01:38:57,476 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:57,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:57,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-14 01:38:57,477 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:57,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1409435201, now seen corresponding path program 1 times [2023-02-14 01:38:57,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:57,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859153341] [2023-02-14 01:38:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:57,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:57,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:57,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859153341] [2023-02-14 01:38:57,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859153341] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:57,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:57,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 01:38:57,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307211641] [2023-02-14 01:38:57,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:57,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 01:38:57,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:57,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 01:38:57,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:38:57,518 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:57,554 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2023-02-14 01:38:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 01:38:57,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-02-14 01:38:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:57,555 INFO L225 Difference]: With dead ends: 57 [2023-02-14 01:38:57,555 INFO L226 Difference]: Without dead ends: 57 [2023-02-14 01:38:57,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-14 01:38:57,556 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 58 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:57,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 77 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-14 01:38:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-02-14 01:38:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.392156862745098) internal successors, (71), 56 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2023-02-14 01:38:57,558 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 16 [2023-02-14 01:38:57,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:57,558 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2023-02-14 01:38:57,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2023-02-14 01:38:57,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 01:38:57,558 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:57,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:57,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-14 01:38:57,559 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:57,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:57,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1409435200, now seen corresponding path program 1 times [2023-02-14 01:38:57,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:57,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514908426] [2023-02-14 01:38:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:57,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:57,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:57,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514908426] [2023-02-14 01:38:57,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514908426] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:57,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:57,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 01:38:57,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090578580] [2023-02-14 01:38:57,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:57,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 01:38:57,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:57,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 01:38:57,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:38:57,619 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:57,648 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2023-02-14 01:38:57,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 01:38:57,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-02-14 01:38:57,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:57,649 INFO L225 Difference]: With dead ends: 87 [2023-02-14 01:38:57,649 INFO L226 Difference]: Without dead ends: 87 [2023-02-14 01:38:57,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:38:57,650 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 32 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:57,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 131 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:57,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-02-14 01:38:57,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2023-02-14 01:38:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 60 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2023-02-14 01:38:57,652 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 16 [2023-02-14 01:38:57,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:57,653 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2023-02-14 01:38:57,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,653 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2023-02-14 01:38:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 01:38:57,653 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:57,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:57,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-14 01:38:57,659 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:57,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1434219452, now seen corresponding path program 1 times [2023-02-14 01:38:57,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:57,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403877028] [2023-02-14 01:38:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:57,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:57,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:57,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403877028] [2023-02-14 01:38:57,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403877028] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:57,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:57,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 01:38:57,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085843880] [2023-02-14 01:38:57,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:57,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 01:38:57,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:57,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 01:38:57,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:38:57,709 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:57,743 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2023-02-14 01:38:57,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 01:38:57,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-02-14 01:38:57,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:57,744 INFO L225 Difference]: With dead ends: 60 [2023-02-14 01:38:57,744 INFO L226 Difference]: Without dead ends: 60 [2023-02-14 01:38:57,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-14 01:38:57,745 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 58 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:57,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 76 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:57,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-14 01:38:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-02-14 01:38:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 59 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2023-02-14 01:38:57,748 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 16 [2023-02-14 01:38:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:57,748 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2023-02-14 01:38:57,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,748 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2023-02-14 01:38:57,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 01:38:57,748 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:57,749 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:57,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-14 01:38:57,749 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:57,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:57,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1434219451, now seen corresponding path program 1 times [2023-02-14 01:38:57,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:57,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344685567] [2023-02-14 01:38:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:57,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:57,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:57,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344685567] [2023-02-14 01:38:57,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344685567] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:57,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:57,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 01:38:57,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299691862] [2023-02-14 01:38:57,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:57,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 01:38:57,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:57,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 01:38:57,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-14 01:38:57,858 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:57,933 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2023-02-14 01:38:57,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 01:38:57,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-02-14 01:38:57,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:57,934 INFO L225 Difference]: With dead ends: 73 [2023-02-14 01:38:57,934 INFO L226 Difference]: Without dead ends: 73 [2023-02-14 01:38:57,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-02-14 01:38:57,935 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 178 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:57,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 97 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:57,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-14 01:38:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2023-02-14 01:38:57,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 60 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2023-02-14 01:38:57,937 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 16 [2023-02-14 01:38:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:57,937 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2023-02-14 01:38:57,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2023-02-14 01:38:57,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 01:38:57,937 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:57,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:57,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-14 01:38:57,937 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:57,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:57,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1996241214, now seen corresponding path program 1 times [2023-02-14 01:38:57,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:57,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362058601] [2023-02-14 01:38:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:57,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:58,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:58,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362058601] [2023-02-14 01:38:58,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362058601] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:58,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:58,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 01:38:58,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294309613] [2023-02-14 01:38:58,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:58,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 01:38:58,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:58,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 01:38:58,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:38:58,007 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:58,035 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2023-02-14 01:38:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 01:38:58,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-02-14 01:38:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:58,036 INFO L225 Difference]: With dead ends: 60 [2023-02-14 01:38:58,036 INFO L226 Difference]: Without dead ends: 60 [2023-02-14 01:38:58,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-14 01:38:58,037 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 36 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:58,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 72 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:58,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-14 01:38:58,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2023-02-14 01:38:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 55 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2023-02-14 01:38:58,039 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 16 [2023-02-14 01:38:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:58,039 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2023-02-14 01:38:58,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,040 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2023-02-14 01:38:58,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 01:38:58,040 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:58,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:58,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-14 01:38:58,041 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:58,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:58,041 INFO L85 PathProgramCache]: Analyzing trace with hash 399147362, now seen corresponding path program 1 times [2023-02-14 01:38:58,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:58,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698609307] [2023-02-14 01:38:58,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:58,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:58,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:58,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698609307] [2023-02-14 01:38:58,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698609307] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:58,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:58,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 01:38:58,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375379456] [2023-02-14 01:38:58,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:58,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 01:38:58,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:58,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 01:38:58,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:38:58,136 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:58,153 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2023-02-14 01:38:58,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 01:38:58,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2023-02-14 01:38:58,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:58,154 INFO L225 Difference]: With dead ends: 55 [2023-02-14 01:38:58,154 INFO L226 Difference]: Without dead ends: 52 [2023-02-14 01:38:58,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 01:38:58,155 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:58,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 66 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:58,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-14 01:38:58,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-02-14 01:38:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.3125) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2023-02-14 01:38:58,157 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 18 [2023-02-14 01:38:58,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:58,157 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2023-02-14 01:38:58,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2023-02-14 01:38:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 01:38:58,158 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:58,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:58,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-14 01:38:58,158 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:58,159 INFO L85 PathProgramCache]: Analyzing trace with hash 398353033, now seen corresponding path program 1 times [2023-02-14 01:38:58,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:58,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436116183] [2023-02-14 01:38:58,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:58,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:58,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:58,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436116183] [2023-02-14 01:38:58,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436116183] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:58,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:58,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 01:38:58,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309596903] [2023-02-14 01:38:58,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:58,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 01:38:58,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:58,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 01:38:58,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:38:58,238 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:58,277 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2023-02-14 01:38:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 01:38:58,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2023-02-14 01:38:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:58,278 INFO L225 Difference]: With dead ends: 78 [2023-02-14 01:38:58,278 INFO L226 Difference]: Without dead ends: 78 [2023-02-14 01:38:58,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-14 01:38:58,279 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 39 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:58,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 138 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:58,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-14 01:38:58,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2023-02-14 01:38:58,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 68 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2023-02-14 01:38:58,281 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 18 [2023-02-14 01:38:58,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:58,281 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2023-02-14 01:38:58,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,282 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2023-02-14 01:38:58,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 01:38:58,282 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:58,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:58,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-14 01:38:58,282 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:58,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:58,283 INFO L85 PathProgramCache]: Analyzing trace with hash -881510645, now seen corresponding path program 1 times [2023-02-14 01:38:58,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:58,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45617721] [2023-02-14 01:38:58,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:58,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:58,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:58,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45617721] [2023-02-14 01:38:58,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45617721] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:58,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:58,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 01:38:58,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056387376] [2023-02-14 01:38:58,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:58,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 01:38:58,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:58,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 01:38:58,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 01:38:58,358 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:58,392 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2023-02-14 01:38:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 01:38:58,392 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2023-02-14 01:38:58,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:58,393 INFO L225 Difference]: With dead ends: 69 [2023-02-14 01:38:58,393 INFO L226 Difference]: Without dead ends: 69 [2023-02-14 01:38:58,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-14 01:38:58,393 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 44 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:58,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 75 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:58,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-14 01:38:58,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2023-02-14 01:38:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2023-02-14 01:38:58,395 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 18 [2023-02-14 01:38:58,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:58,395 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2023-02-14 01:38:58,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2023-02-14 01:38:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 01:38:58,396 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:58,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:58,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-14 01:38:58,396 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:58,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:58,396 INFO L85 PathProgramCache]: Analyzing trace with hash -536115456, now seen corresponding path program 1 times [2023-02-14 01:38:58,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:58,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308540168] [2023-02-14 01:38:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:58,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:58,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:58,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308540168] [2023-02-14 01:38:58,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308540168] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:58,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:58,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 01:38:58,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775059611] [2023-02-14 01:38:58,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:58,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 01:38:58,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:58,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 01:38:58,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-14 01:38:58,536 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:58,628 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2023-02-14 01:38:58,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 01:38:58,629 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2023-02-14 01:38:58,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:58,629 INFO L225 Difference]: With dead ends: 68 [2023-02-14 01:38:58,629 INFO L226 Difference]: Without dead ends: 68 [2023-02-14 01:38:58,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-02-14 01:38:58,630 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 78 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:58,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 90 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:38:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-14 01:38:58,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2023-02-14 01:38:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.26) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2023-02-14 01:38:58,632 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 19 [2023-02-14 01:38:58,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:58,632 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2023-02-14 01:38:58,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,632 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2023-02-14 01:38:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-14 01:38:58,633 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:58,633 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:58,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-14 01:38:58,633 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:58,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1773371798, now seen corresponding path program 1 times [2023-02-14 01:38:58,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:58,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864303092] [2023-02-14 01:38:58,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:58,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:38:58,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:58,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864303092] [2023-02-14 01:38:58,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864303092] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:58,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:58,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 01:38:58,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863846565] [2023-02-14 01:38:58,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:58,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 01:38:58,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:58,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 01:38:58,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:38:58,708 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:58,747 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2023-02-14 01:38:58,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 01:38:58,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2023-02-14 01:38:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:58,748 INFO L225 Difference]: With dead ends: 69 [2023-02-14 01:38:58,748 INFO L226 Difference]: Without dead ends: 69 [2023-02-14 01:38:58,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 01:38:58,749 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:58,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 125 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:58,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-14 01:38:58,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2023-02-14 01:38:58,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 59 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2023-02-14 01:38:58,751 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 20 [2023-02-14 01:38:58,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:58,751 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2023-02-14 01:38:58,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,752 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2023-02-14 01:38:58,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-14 01:38:58,752 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:58,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:58,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-14 01:38:58,753 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:58,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:58,753 INFO L85 PathProgramCache]: Analyzing trace with hash 185023896, now seen corresponding path program 1 times [2023-02-14 01:38:58,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:58,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920635879] [2023-02-14 01:38:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:58,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:38:58,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:58,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920635879] [2023-02-14 01:38:58,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920635879] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:58,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:58,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 01:38:58,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927031576] [2023-02-14 01:38:58,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:58,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 01:38:58,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:58,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 01:38:58,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-14 01:38:58,890 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:58,952 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2023-02-14 01:38:58,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 01:38:58,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2023-02-14 01:38:58,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:58,953 INFO L225 Difference]: With dead ends: 79 [2023-02-14 01:38:58,953 INFO L226 Difference]: Without dead ends: 79 [2023-02-14 01:38:58,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-02-14 01:38:58,954 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 67 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:58,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 145 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:38:58,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-14 01:38:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2023-02-14 01:38:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-14 01:38:58,956 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 20 [2023-02-14 01:38:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:58,956 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-14 01:38:58,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-14 01:38:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 01:38:58,956 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:58,957 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:58,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-02-14 01:38:58,957 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:58,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:58,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1567874516, now seen corresponding path program 1 times [2023-02-14 01:38:58,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:58,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55480762] [2023-02-14 01:38:58,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:58,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:59,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:59,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55480762] [2023-02-14 01:38:59,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55480762] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:59,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:59,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 01:38:59,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429686802] [2023-02-14 01:38:59,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:59,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 01:38:59,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 01:38:59,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-14 01:38:59,145 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:59,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:59,246 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2023-02-14 01:38:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 01:38:59,247 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2023-02-14 01:38:59,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:59,247 INFO L225 Difference]: With dead ends: 104 [2023-02-14 01:38:59,247 INFO L226 Difference]: Without dead ends: 88 [2023-02-14 01:38:59,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-02-14 01:38:59,248 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 80 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:59,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 212 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:38:59,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-14 01:38:59,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2023-02-14 01:38:59,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.208955223880597) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2023-02-14 01:38:59,250 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 22 [2023-02-14 01:38:59,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:59,250 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2023-02-14 01:38:59,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:59,250 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2023-02-14 01:38:59,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 01:38:59,250 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:59,250 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:59,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-14 01:38:59,251 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:59,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:59,251 INFO L85 PathProgramCache]: Analyzing trace with hash 750226066, now seen corresponding path program 1 times [2023-02-14 01:38:59,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:59,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062941650] [2023-02-14 01:38:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:59,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:59,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:59,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062941650] [2023-02-14 01:38:59,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062941650] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:38:59,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:38:59,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-14 01:38:59,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006936931] [2023-02-14 01:38:59,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:38:59,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 01:38:59,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:38:59,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 01:38:59,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-14 01:38:59,537 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:59,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:59,672 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2023-02-14 01:38:59,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 01:38:59,673 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2023-02-14 01:38:59,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:59,673 INFO L225 Difference]: With dead ends: 122 [2023-02-14 01:38:59,673 INFO L226 Difference]: Without dead ends: 108 [2023-02-14 01:38:59,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-14 01:38:59,674 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 113 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:59,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 212 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:38:59,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-14 01:38:59,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 73. [2023-02-14 01:38:59,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 72 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2023-02-14 01:38:59,676 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 22 [2023-02-14 01:38:59,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:59,676 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2023-02-14 01:38:59,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:38:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2023-02-14 01:38:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 01:38:59,676 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:59,676 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:59,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-14 01:38:59,677 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:38:59,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:59,677 INFO L85 PathProgramCache]: Analyzing trace with hash 354556917, now seen corresponding path program 1 times [2023-02-14 01:38:59,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:59,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800577440] [2023-02-14 01:38:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:59,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:38:59,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:38:59,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800577440] [2023-02-14 01:38:59,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800577440] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:38:59,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133284448] [2023-02-14 01:38:59,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:59,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:38:59,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:38:59,829 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) [2023-02-14 01:38:59,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 01:38:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:38:59,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-14 01:38:59,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:38:59,930 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:38:59,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-14 01:38:59,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:39:00,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:00,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2023-02-14 01:39:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:00,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:00,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-02-14 01:39:00,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-02-14 01:39:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:00,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133284448] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:00,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:00,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 23 [2023-02-14 01:39:00,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991726855] [2023-02-14 01:39:00,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:00,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 01:39:00,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:00,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 01:39:00,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2023-02-14 01:39:00,474 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:01,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:01,485 INFO L93 Difference]: Finished difference Result 140 states and 156 transitions. [2023-02-14 01:39:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-14 01:39:01,485 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 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 24 [2023-02-14 01:39:01,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:01,486 INFO L225 Difference]: With dead ends: 140 [2023-02-14 01:39:01,486 INFO L226 Difference]: Without dead ends: 138 [2023-02-14 01:39:01,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=332, Invalid=1830, Unknown=0, NotChecked=0, Total=2162 [2023-02-14 01:39:01,488 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 302 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:01,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 314 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 01:39:01,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-14 01:39:01,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2023-02-14 01:39:01,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.2065217391304348) internal successors, (111), 95 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2023-02-14 01:39:01,491 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 24 [2023-02-14 01:39:01,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:01,491 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2023-02-14 01:39:01,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2023-02-14 01:39:01,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 01:39:01,491 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:01,492 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 01:39:01,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 01:39:01,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:01,698 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:01,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:01,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1426740587, now seen corresponding path program 1 times [2023-02-14 01:39:01,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:01,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385990019] [2023-02-14 01:39:01,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:01,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:01,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:01,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385990019] [2023-02-14 01:39:01,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385990019] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:01,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529162489] [2023-02-14 01:39:01,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:01,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:01,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:01,889 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) [2023-02-14 01:39:01,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 01:39:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:01,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 01:39:01,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:02,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:02,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 01:39:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:02,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529162489] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:02,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:02,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2023-02-14 01:39:02,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450327522] [2023-02-14 01:39:02,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:02,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 01:39:02,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:02,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 01:39:02,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-02-14 01:39:02,173 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 19 states, 18 states have (on average 3.111111111111111) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:02,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:02,433 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2023-02-14 01:39:02,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 01:39:02,434 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.111111111111111) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 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 26 [2023-02-14 01:39:02,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:02,434 INFO L225 Difference]: With dead ends: 116 [2023-02-14 01:39:02,434 INFO L226 Difference]: Without dead ends: 116 [2023-02-14 01:39:02,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2023-02-14 01:39:02,435 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 360 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:02,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 321 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:39:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-14 01:39:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2023-02-14 01:39:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.2) internal successors, (114), 98 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2023-02-14 01:39:02,438 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 26 [2023-02-14 01:39:02,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:02,438 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2023-02-14 01:39:02,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.111111111111111) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2023-02-14 01:39:02,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 01:39:02,439 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:02,439 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 01:39:02,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 01:39:02,645 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,SelfDestructingSolverStorable33 [2023-02-14 01:39:02,646 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:02,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:02,646 INFO L85 PathProgramCache]: Analyzing trace with hash 522576623, now seen corresponding path program 1 times [2023-02-14 01:39:02,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:02,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219898300] [2023-02-14 01:39:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:02,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:02,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:02,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219898300] [2023-02-14 01:39:02,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219898300] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:02,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634385915] [2023-02-14 01:39:02,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:02,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:02,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:02,853 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) [2023-02-14 01:39:02,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 01:39:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:02,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-14 01:39:02,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:02,953 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:39:02,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-14 01:39:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:03,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:03,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634385915] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:03,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:03,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-02-14 01:39:03,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635023367] [2023-02-14 01:39:03,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:03,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 01:39:03,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:03,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 01:39:03,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-02-14 01:39:03,221 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:03,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:03,535 INFO L93 Difference]: Finished difference Result 144 states and 163 transitions. [2023-02-14 01:39:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 01:39:03,535 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 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 26 [2023-02-14 01:39:03,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:03,536 INFO L225 Difference]: With dead ends: 144 [2023-02-14 01:39:03,536 INFO L226 Difference]: Without dead ends: 144 [2023-02-14 01:39:03,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2023-02-14 01:39:03,536 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 281 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:03,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 397 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 01:39:03,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-14 01:39:03,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2023-02-14 01:39:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.1794871794871795) internal successors, (138), 120 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:03,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 138 transitions. [2023-02-14 01:39:03,539 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 138 transitions. Word has length 26 [2023-02-14 01:39:03,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:03,539 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 138 transitions. [2023-02-14 01:39:03,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:03,539 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 138 transitions. [2023-02-14 01:39:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 01:39:03,540 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:03,540 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 01:39:03,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 01:39:03,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:03,740 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:03,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:03,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1003138060, now seen corresponding path program 1 times [2023-02-14 01:39:03,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:03,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748593490] [2023-02-14 01:39:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:03,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:03,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:03,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748593490] [2023-02-14 01:39:03,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748593490] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:39:03,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:39:03,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-14 01:39:03,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202154275] [2023-02-14 01:39:03,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:39:03,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 01:39:03,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:03,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 01:39:03,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-14 01:39:03,899 INFO L87 Difference]: Start difference. First operand 121 states and 138 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:03,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:03,983 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2023-02-14 01:39:03,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 01:39:03,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2023-02-14 01:39:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:03,984 INFO L225 Difference]: With dead ends: 156 [2023-02-14 01:39:03,984 INFO L226 Difference]: Without dead ends: 147 [2023-02-14 01:39:03,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-14 01:39:03,985 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:03,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 218 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:39:03,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-14 01:39:03,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 140. [2023-02-14 01:39:03,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 136 states have (on average 1.161764705882353) internal successors, (158), 139 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:03,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2023-02-14 01:39:03,987 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 28 [2023-02-14 01:39:03,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:03,987 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2023-02-14 01:39:03,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2023-02-14 01:39:03,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 01:39:03,988 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:03,988 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 01:39:03,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-02-14 01:39:03,988 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:03,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1065177674, now seen corresponding path program 1 times [2023-02-14 01:39:03,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:03,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386203588] [2023-02-14 01:39:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:03,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:04,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:04,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386203588] [2023-02-14 01:39:04,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386203588] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:39:04,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:39:04,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 01:39:04,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65271423] [2023-02-14 01:39:04,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:39:04,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 01:39:04,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:04,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 01:39:04,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-14 01:39:04,183 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:04,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:04,277 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2023-02-14 01:39:04,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 01:39:04,277 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2023-02-14 01:39:04,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:04,278 INFO L225 Difference]: With dead ends: 146 [2023-02-14 01:39:04,278 INFO L226 Difference]: Without dead ends: 137 [2023-02-14 01:39:04,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-14 01:39:04,278 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 80 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:04,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 189 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:39:04,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-02-14 01:39:04,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 108. [2023-02-14 01:39:04,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 107 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2023-02-14 01:39:04,280 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 28 [2023-02-14 01:39:04,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:04,281 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2023-02-14 01:39:04,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:04,281 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2023-02-14 01:39:04,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 01:39:04,281 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:04,281 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:39:04,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-02-14 01:39:04,281 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:04,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:04,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1176221819, now seen corresponding path program 2 times [2023-02-14 01:39:04,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:04,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902435127] [2023-02-14 01:39:04,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:04,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:04,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:04,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902435127] [2023-02-14 01:39:04,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902435127] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:04,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516513397] [2023-02-14 01:39:04,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:39:04,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:04,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:04,717 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) [2023-02-14 01:39:04,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 01:39:04,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:39:04,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:39:04,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-14 01:39:04,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:04,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 01:39:04,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:39:05,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:39:05,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 01:39:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:05,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:05,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:05,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-14 01:39:05,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:05,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2023-02-14 01:39:05,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 01:39:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:05,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516513397] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:05,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:05,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2023-02-14 01:39:05,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635327303] [2023-02-14 01:39:05,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:05,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-14 01:39:05,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:05,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-14 01:39:05,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=899, Unknown=3, NotChecked=0, Total=992 [2023-02-14 01:39:05,879 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:06,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:06,673 INFO L93 Difference]: Finished difference Result 196 states and 219 transitions. [2023-02-14 01:39:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 01:39:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 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 29 [2023-02-14 01:39:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:06,674 INFO L225 Difference]: With dead ends: 196 [2023-02-14 01:39:06,674 INFO L226 Difference]: Without dead ends: 179 [2023-02-14 01:39:06,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=236, Invalid=1483, Unknown=3, NotChecked=0, Total=1722 [2023-02-14 01:39:06,675 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 283 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:06,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 672 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 01:39:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-14 01:39:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 132. [2023-02-14 01:39:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 128 states have (on average 1.1640625) internal successors, (149), 131 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:06,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2023-02-14 01:39:06,678 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 29 [2023-02-14 01:39:06,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:06,678 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2023-02-14 01:39:06,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:06,678 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2023-02-14 01:39:06,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 01:39:06,679 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:06,679 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 01:39:06,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 01:39:06,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:06,879 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:06,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:06,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1062452754, now seen corresponding path program 1 times [2023-02-14 01:39:06,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:06,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331095655] [2023-02-14 01:39:06,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:06,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:07,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:07,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331095655] [2023-02-14 01:39:07,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331095655] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:07,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801341270] [2023-02-14 01:39:07,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:07,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:07,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:07,032 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) [2023-02-14 01:39:07,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 01:39:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:07,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 01:39:07,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:07,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:39:07,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801341270] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:07,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:39:07,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 5] total 12 [2023-02-14 01:39:07,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818136161] [2023-02-14 01:39:07,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:39:07,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 01:39:07,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:07,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 01:39:07,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-14 01:39:07,209 INFO L87 Difference]: Start difference. First operand 132 states and 149 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:07,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:07,219 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2023-02-14 01:39:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 01:39:07,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 30 [2023-02-14 01:39:07,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:07,220 INFO L225 Difference]: With dead ends: 132 [2023-02-14 01:39:07,220 INFO L226 Difference]: Without dead ends: 107 [2023-02-14 01:39:07,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-14 01:39:07,221 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:07,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 90 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:39:07,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-14 01:39:07,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-02-14 01:39:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 106 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:07,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2023-02-14 01:39:07,223 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 30 [2023-02-14 01:39:07,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:07,223 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2023-02-14 01:39:07,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:07,224 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2023-02-14 01:39:07,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 01:39:07,224 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:07,224 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:39:07,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 01:39:07,430 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,SelfDestructingSolverStorable38 [2023-02-14 01:39:07,430 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:07,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:07,431 INFO L85 PathProgramCache]: Analyzing trace with hash -202359672, now seen corresponding path program 3 times [2023-02-14 01:39:07,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:07,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311286259] [2023-02-14 01:39:07,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:07,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:07,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:07,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311286259] [2023-02-14 01:39:07,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311286259] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:07,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258113353] [2023-02-14 01:39:07,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 01:39:07,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:07,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:07,664 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) [2023-02-14 01:39:07,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 01:39:07,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 01:39:07,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:39:07,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-14 01:39:07,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:07,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:08,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 01:39:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:08,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258113353] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:08,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:08,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-02-14 01:39:08,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931248820] [2023-02-14 01:39:08,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:08,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 01:39:08,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:08,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 01:39:08,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2023-02-14 01:39:08,126 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:08,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:08,512 INFO L93 Difference]: Finished difference Result 157 states and 172 transitions. [2023-02-14 01:39:08,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 01:39:08,512 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 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 33 [2023-02-14 01:39:08,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:08,513 INFO L225 Difference]: With dead ends: 157 [2023-02-14 01:39:08,513 INFO L226 Difference]: Without dead ends: 157 [2023-02-14 01:39:08,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 01:39:08,514 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 327 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:08,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 396 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 01:39:08,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-02-14 01:39:08,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 137. [2023-02-14 01:39:08,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 133 states have (on average 1.150375939849624) internal successors, (153), 136 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 153 transitions. [2023-02-14 01:39:08,517 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 153 transitions. Word has length 33 [2023-02-14 01:39:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:08,517 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 153 transitions. [2023-02-14 01:39:08,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:08,517 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 153 transitions. [2023-02-14 01:39:08,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 01:39:08,517 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:08,517 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 01:39:08,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 01:39:08,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-14 01:39:08,725 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:08,725 INFO L85 PathProgramCache]: Analyzing trace with hash -500646399, now seen corresponding path program 1 times [2023-02-14 01:39:08,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:08,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088265226] [2023-02-14 01:39:08,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:08,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:08,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:08,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088265226] [2023-02-14 01:39:08,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088265226] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:08,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86886775] [2023-02-14 01:39:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:08,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:08,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:08,933 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) [2023-02-14 01:39:08,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 01:39:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:09,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-14 01:39:09,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:09,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:09,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 01:39:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:09,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86886775] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:09,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:09,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-02-14 01:39:09,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439228400] [2023-02-14 01:39:09,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:09,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 01:39:09,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:09,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 01:39:09,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2023-02-14 01:39:09,296 INFO L87 Difference]: Start difference. First operand 137 states and 153 transitions. Second operand has 24 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:09,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:09,791 INFO L93 Difference]: Finished difference Result 194 states and 209 transitions. [2023-02-14 01:39:09,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 01:39:09,792 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2023-02-14 01:39:09,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:09,793 INFO L225 Difference]: With dead ends: 194 [2023-02-14 01:39:09,793 INFO L226 Difference]: Without dead ends: 194 [2023-02-14 01:39:09,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=346, Invalid=1214, Unknown=0, NotChecked=0, Total=1560 [2023-02-14 01:39:09,794 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 348 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:09,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 359 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 01:39:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-02-14 01:39:09,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 143. [2023-02-14 01:39:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 139 states have (on average 1.143884892086331) internal successors, (159), 142 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2023-02-14 01:39:09,797 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 33 [2023-02-14 01:39:09,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:09,797 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2023-02-14 01:39:09,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:09,797 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2023-02-14 01:39:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 01:39:09,797 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:09,797 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 01:39:09,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 01:39:09,998 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,SelfDestructingSolverStorable40 [2023-02-14 01:39:09,998 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:09,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:09,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1852639117, now seen corresponding path program 1 times [2023-02-14 01:39:09,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:09,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147431927] [2023-02-14 01:39:09,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:09,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:10,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:10,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147431927] [2023-02-14 01:39:10,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147431927] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:10,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735363511] [2023-02-14 01:39:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:10,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:10,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:10,537 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:39:10,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 01:39:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:10,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-14 01:39:10,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:10,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 01:39:10,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:39:10,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:39:10,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:39:11,035 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 01:39:11,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2023-02-14 01:39:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:11,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:11,084 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_572 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_572) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2023-02-14 01:39:11,101 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_571 (Array Int Int)) (v_ArrVal_572 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_571) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_572) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2023-02-14 01:39:11,146 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_572 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_572) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0)) is different from false [2023-02-14 01:39:11,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:11,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-14 01:39:11,159 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:11,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2023-02-14 01:39:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-02-14 01:39:11,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735363511] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:11,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:11,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2023-02-14 01:39:11,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690323050] [2023-02-14 01:39:11,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:11,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-14 01:39:11,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:11,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-14 01:39:11,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=12, NotChecked=168, Total=992 [2023-02-14 01:39:11,332 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:12,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:12,056 INFO L93 Difference]: Finished difference Result 172 states and 189 transitions. [2023-02-14 01:39:12,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 01:39:12,056 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 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 35 [2023-02-14 01:39:12,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:12,057 INFO L225 Difference]: With dead ends: 172 [2023-02-14 01:39:12,057 INFO L226 Difference]: Without dead ends: 155 [2023-02-14 01:39:12,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 3 IntricatePredicates, 3 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=290, Invalid=1349, Unknown=13, NotChecked=240, Total=1892 [2023-02-14 01:39:12,060 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 152 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 4 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:12,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 568 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 283 Invalid, 18 Unknown, 147 Unchecked, 0.2s Time] [2023-02-14 01:39:12,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-02-14 01:39:12,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 132. [2023-02-14 01:39:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 128 states have (on average 1.140625) internal successors, (146), 131 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) [2023-02-14 01:39:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 146 transitions. [2023-02-14 01:39:12,062 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 146 transitions. Word has length 35 [2023-02-14 01:39:12,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:12,063 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 146 transitions. [2023-02-14 01:39:12,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 146 transitions. [2023-02-14 01:39:12,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 01:39:12,063 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:12,063 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:39:12,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 01:39:12,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-02-14 01:39:12,272 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:12,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:12,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1637145420, now seen corresponding path program 4 times [2023-02-14 01:39:12,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:12,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695739649] [2023-02-14 01:39:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:12,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:12,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:12,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695739649] [2023-02-14 01:39:12,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695739649] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:12,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589256669] [2023-02-14 01:39:12,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 01:39:12,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:12,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:12,686 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:39:12,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 01:39:12,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 01:39:12,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:39:12,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-14 01:39:12,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:12,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:39:12,956 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2023-02-14 01:39:12,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2023-02-14 01:39:13,414 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-02-14 01:39:13,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2023-02-14 01:39:13,557 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:39:13,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:14,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2023-02-14 01:39:14,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2023-02-14 01:39:14,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2023-02-14 01:39:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:39:14,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589256669] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:14,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:14,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-02-14 01:39:14,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120734062] [2023-02-14 01:39:14,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:14,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-14 01:39:14,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:14,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-14 01:39:14,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2023-02-14 01:39:14,375 INFO L87 Difference]: Start difference. First operand 132 states and 146 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:15,554 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post6#1.base|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse3 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (not (= (select .cse0 (+ (- 2) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) (= (+ |c_ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= 0 (select .cse1 (+ 2 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (not (= 0 (select .cse2 (+ (- 1) |c_ULTIMATE.start_cstrlcpy_#t~post6#1.offset|)))) (<= 1 |c_ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 3 |c_ULTIMATE.start_main_~length~0#1|) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (forall ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_37| Int)) (or (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_37|) 0) (= (select .cse0 (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_37| 1)) 0) (not (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_37|)) (= (select .cse0 (+ 2 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_37|)) 0) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_37| 4) .cse3) (not (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_37| |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)))) (<= |c_ULTIMATE.start_main_~length~0#1| 3) (= (select .cse0 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0) (= |c_ULTIMATE.start_cstrlcpy_#t~post6#1.base| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= |c_ULTIMATE.start_main_~i~0#1| 2) (exists ((|ULTIMATE.start_main_~length~0#1| Int)) (and (= (select .cse1 (+ (- 1) |ULTIMATE.start_main_~length~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0) (<= (+ |ULTIMATE.start_main_~length~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (not (< |ULTIMATE.start_main_~length~0#1| 1)))) (= |c_ULTIMATE.start_cstrlcpy_#t~mem7#1| (select .cse0 (+ (- 1) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|))) (<= 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (exists ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~length~0#1| Int)) (and (<= |c_ULTIMATE.start_cstrlcpy_#t~post6#1.offset| (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) (= (select .cse2 (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length~0#1|)) 0) (<= (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length~0#1|) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_#t~post6#1.base|)) (not (< |ULTIMATE.start_main_~length~0#1| 1)))) (exists ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~length~0#1| Int)) (and (= (select .cse0 (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length~0#1|)) 0) (<= (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length~0#1|) .cse3) (not (< |ULTIMATE.start_main_~length~0#1| 1)) (<= |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 2)))))) is different from false [2023-02-14 01:39:16,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:16,949 INFO L93 Difference]: Finished difference Result 257 states and 282 transitions. [2023-02-14 01:39:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-14 01:39:16,949 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 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 36 [2023-02-14 01:39:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:16,950 INFO L225 Difference]: With dead ends: 257 [2023-02-14 01:39:16,950 INFO L226 Difference]: Without dead ends: 197 [2023-02-14 01:39:16,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=658, Invalid=4455, Unknown=3, NotChecked=140, Total=5256 [2023-02-14 01:39:16,952 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 303 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:16,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 834 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1113 Invalid, 0 Unknown, 1 Unchecked, 0.7s Time] [2023-02-14 01:39:16,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-02-14 01:39:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 108. [2023-02-14 01:39:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 104 states have (on average 1.1346153846153846) internal successors, (118), 107 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) [2023-02-14 01:39:16,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2023-02-14 01:39:16,954 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 36 [2023-02-14 01:39:16,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:16,954 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2023-02-14 01:39:16,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:16,955 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2023-02-14 01:39:16,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 01:39:16,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:16,955 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:39:16,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 01:39:17,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-02-14 01:39:17,161 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:17,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:17,162 INFO L85 PathProgramCache]: Analyzing trace with hash 61961554, now seen corresponding path program 1 times [2023-02-14 01:39:17,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:17,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396114678] [2023-02-14 01:39:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:17,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:17,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:17,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396114678] [2023-02-14 01:39:17,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396114678] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:17,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867446630] [2023-02-14 01:39:17,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:17,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:17,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:17,365 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:39:17,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 01:39:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:17,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-14 01:39:17,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:17,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 01:39:17,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:39:17,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:39:17,780 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 01:39:17,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2023-02-14 01:39:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:39:17,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:17,945 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:17,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-14 01:39:17,949 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:17,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2023-02-14 01:39:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:39:18,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867446630] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:18,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:18,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2023-02-14 01:39:18,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112423528] [2023-02-14 01:39:18,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:18,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 01:39:18,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:18,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 01:39:18,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=658, Unknown=28, NotChecked=0, Total=756 [2023-02-14 01:39:18,096 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:19,178 INFO L93 Difference]: Finished difference Result 172 states and 181 transitions. [2023-02-14 01:39:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-14 01:39:19,179 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 0 states have call successors, (0), 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 37 [2023-02-14 01:39:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:19,179 INFO L225 Difference]: With dead ends: 172 [2023-02-14 01:39:19,179 INFO L226 Difference]: Without dead ends: 126 [2023-02-14 01:39:19,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=411, Invalid=2635, Unknown=34, NotChecked=0, Total=3080 [2023-02-14 01:39:19,181 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 190 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:19,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 703 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 01:39:19,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-14 01:39:19,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2023-02-14 01:39:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.1263157894736842) internal successors, (107), 98 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2023-02-14 01:39:19,183 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 37 [2023-02-14 01:39:19,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:19,184 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2023-02-14 01:39:19,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:19,184 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2023-02-14 01:39:19,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 01:39:19,184 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:19,184 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 01:39:19,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 01:39:19,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-02-14 01:39:19,391 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:19,391 INFO L85 PathProgramCache]: Analyzing trace with hash 782689156, now seen corresponding path program 2 times [2023-02-14 01:39:19,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:19,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106301260] [2023-02-14 01:39:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:19,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:20,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:20,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106301260] [2023-02-14 01:39:20,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106301260] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:20,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671540749] [2023-02-14 01:39:20,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:39:20,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:20,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:20,521 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:39:20,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 01:39:20,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:39:20,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:39:20,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-14 01:39:20,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:20,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 01:39:20,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-14 01:39:20,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:39:21,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:39:21,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:39:21,313 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:21,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-02-14 01:39:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:21,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:22,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:22,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-14 01:39:22,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:22,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2023-02-14 01:39:22,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-14 01:39:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:22,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671540749] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:22,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:22,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 15] total 50 [2023-02-14 01:39:22,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102022725] [2023-02-14 01:39:22,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:22,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-14 01:39:22,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:22,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-14 01:39:22,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2257, Unknown=3, NotChecked=0, Total=2450 [2023-02-14 01:39:22,443 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 50 states, 50 states have (on average 2.36) internal successors, (118), 50 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) [2023-02-14 01:39:27,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:27,685 INFO L93 Difference]: Finished difference Result 212 states and 227 transitions. [2023-02-14 01:39:27,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-14 01:39:27,686 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.36) internal successors, (118), 50 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 42 [2023-02-14 01:39:27,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:27,686 INFO L225 Difference]: With dead ends: 212 [2023-02-14 01:39:27,686 INFO L226 Difference]: Without dead ends: 192 [2023-02-14 01:39:27,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1062, Invalid=8055, Unknown=3, NotChecked=0, Total=9120 [2023-02-14 01:39:27,688 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 722 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:27,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 551 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 01:39:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-02-14 01:39:27,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 112. [2023-02-14 01:39:27,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 108 states have (on average 1.1203703703703705) internal successors, (121), 111 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:27,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2023-02-14 01:39:27,691 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 42 [2023-02-14 01:39:27,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:27,691 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2023-02-14 01:39:27,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.36) internal successors, (118), 50 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) [2023-02-14 01:39:27,691 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2023-02-14 01:39:27,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 01:39:27,691 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:27,691 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:39:27,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-14 01:39:27,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:27,899 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:27,899 INFO L85 PathProgramCache]: Analyzing trace with hash 150226200, now seen corresponding path program 2 times [2023-02-14 01:39:27,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:27,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572483255] [2023-02-14 01:39:27,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:27,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 01:39:28,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:28,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572483255] [2023-02-14 01:39:28,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572483255] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:28,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450601478] [2023-02-14 01:39:28,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:39:28,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:28,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:28,171 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:39:28,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 01:39:28,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:39:28,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:39:28,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-14 01:39:28,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:28,304 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:39:28,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-14 01:39:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 01:39:28,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 01:39:28,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450601478] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:28,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:28,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-02-14 01:39:28,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956659558] [2023-02-14 01:39:28,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:28,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 01:39:28,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:28,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 01:39:28,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2023-02-14 01:39:28,712 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand has 26 states, 25 states have (on average 3.72) internal successors, (93), 26 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:29,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:29,030 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2023-02-14 01:39:29,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 01:39:29,031 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.72) internal successors, (93), 26 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-14 01:39:29,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:29,031 INFO L225 Difference]: With dead ends: 114 [2023-02-14 01:39:29,031 INFO L226 Difference]: Without dead ends: 114 [2023-02-14 01:39:29,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 01:39:29,032 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 421 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:29,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 241 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:39:29,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-14 01:39:29,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2023-02-14 01:39:29,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 108 states have (on average 1.1111111111111112) internal successors, (120), 111 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:29,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2023-02-14 01:39:29,034 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 45 [2023-02-14 01:39:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:29,034 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2023-02-14 01:39:29,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.72) internal successors, (93), 26 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:29,035 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2023-02-14 01:39:29,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-14 01:39:29,035 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:29,035 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 01:39:29,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 01:39:29,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:29,241 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:29,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:29,242 INFO L85 PathProgramCache]: Analyzing trace with hash -691661592, now seen corresponding path program 3 times [2023-02-14 01:39:29,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:29,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693200071] [2023-02-14 01:39:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:29,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:30,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:30,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693200071] [2023-02-14 01:39:30,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693200071] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:30,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60472684] [2023-02-14 01:39:30,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 01:39:30,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:30,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:30,259 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:39:30,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 01:39:30,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 01:39:30,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:39:30,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-14 01:39:30,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:30,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:39:30,807 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:39:30,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-14 01:39:30,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-14 01:39:30,978 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:39:30,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 33 [2023-02-14 01:39:31,137 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2023-02-14 01:39:31,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 41 [2023-02-14 01:39:31,274 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 01:39:31,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:31,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2023-02-14 01:39:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:39:31,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:35,474 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:35,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-02-14 01:39:35,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:35,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-14 01:39:35,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:35,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2023-02-14 01:39:35,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:35,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2023-02-14 01:39:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:39:36,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60472684] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:36,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:36,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16, 16] total 47 [2023-02-14 01:39:36,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154320286] [2023-02-14 01:39:36,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:36,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-14 01:39:36,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:36,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-14 01:39:36,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1994, Unknown=12, NotChecked=0, Total=2162 [2023-02-14 01:39:36,291 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 47 states, 47 states have (on average 2.5531914893617023) internal successors, (120), 47 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:38,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:38,825 INFO L93 Difference]: Finished difference Result 202 states and 213 transitions. [2023-02-14 01:39:38,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-14 01:39:38,826 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.5531914893617023) internal successors, (120), 47 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-02-14 01:39:38,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:38,827 INFO L225 Difference]: With dead ends: 202 [2023-02-14 01:39:38,827 INFO L226 Difference]: Without dead ends: 174 [2023-02-14 01:39:38,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=735, Invalid=5259, Unknown=12, NotChecked=0, Total=6006 [2023-02-14 01:39:38,829 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 448 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:38,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 817 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 01:39:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-02-14 01:39:38,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 136. [2023-02-14 01:39:38,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.106060606060606) internal successors, (146), 135 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) [2023-02-14 01:39:38,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2023-02-14 01:39:38,838 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 48 [2023-02-14 01:39:38,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:38,838 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2023-02-14 01:39:38,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.5531914893617023) internal successors, (120), 47 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:38,838 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2023-02-14 01:39:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 01:39:38,839 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:38,839 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:39:38,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-14 01:39:39,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-14 01:39:39,045 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:39,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:39,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1700052269, now seen corresponding path program 4 times [2023-02-14 01:39:39,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:39,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149836223] [2023-02-14 01:39:39,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:39,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:39,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:39,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149836223] [2023-02-14 01:39:39,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149836223] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:39,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110583592] [2023-02-14 01:39:39,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 01:39:39,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:39,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:39,610 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:39:39,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 01:39:39,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 01:39:39,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:39:39,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 86 conjunts are in the unsatisfiable core [2023-02-14 01:39:39,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:40,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:39:40,199 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:39:40,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-14 01:39:40,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-14 01:39:40,333 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-02-14 01:39:40,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 35 [2023-02-14 01:39:40,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 01:39:40,744 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 01:39:40,752 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 01:39:40,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 21 [2023-02-14 01:39:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:40,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:41,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:41,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2023-02-14 01:39:41,073 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_7 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_42| Int)) (let ((.cse0 (select (store |c_#memory_int| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_42| v_arrayElimArr_7) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (= (select .cse0 (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0) (not (= (select v_arrayElimArr_7 (+ |c_ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1)) 0)) (= (select .cse0 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)))) is different from false [2023-02-14 01:39:41,106 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_7 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_42| Int)) (let ((.cse0 (select (store |c_#memory_int| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_42| v_arrayElimArr_7) |c_ULTIMATE.start_main_~nondetString2~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0) (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0) (not (= (select v_arrayElimArr_7 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0))))) is different from false [2023-02-14 01:39:41,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:41,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-02-14 01:39:41,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:41,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 59 [2023-02-14 01:39:41,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:41,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 37 [2023-02-14 01:39:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-02-14 01:39:41,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110583592] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:41,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:41,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 48 [2023-02-14 01:39:41,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093744371] [2023-02-14 01:39:41,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:41,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-14 01:39:41,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:41,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-14 01:39:41,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1920, Unknown=2, NotChecked=178, Total=2256 [2023-02-14 01:39:41,688 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 48 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:43,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:43,162 INFO L93 Difference]: Finished difference Result 262 states and 279 transitions. [2023-02-14 01:39:43,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 01:39:43,162 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 48 states have internal predecessors, (128), 0 states have call successors, (0), 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 49 [2023-02-14 01:39:43,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:43,163 INFO L225 Difference]: With dead ends: 262 [2023-02-14 01:39:43,163 INFO L226 Difference]: Without dead ends: 239 [2023-02-14 01:39:43,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=431, Invalid=3865, Unknown=2, NotChecked=258, Total=4556 [2023-02-14 01:39:43,164 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 292 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:43,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 980 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 836 Invalid, 0 Unknown, 186 Unchecked, 0.4s Time] [2023-02-14 01:39:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-02-14 01:39:43,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 165. [2023-02-14 01:39:43,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 161 states have (on average 1.1055900621118013) internal successors, (178), 164 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:43,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2023-02-14 01:39:43,168 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 49 [2023-02-14 01:39:43,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:43,168 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2023-02-14 01:39:43,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 48 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:43,168 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2023-02-14 01:39:43,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 01:39:43,168 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:43,168 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:39:43,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-14 01:39:43,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-14 01:39:43,373 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:43,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:43,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1471288007, now seen corresponding path program 3 times [2023-02-14 01:39:43,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:43,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835220274] [2023-02-14 01:39:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:43,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:39:43,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:43,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835220274] [2023-02-14 01:39:43,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835220274] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:43,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897549274] [2023-02-14 01:39:43,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 01:39:43,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:43,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:43,621 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:39:43,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 01:39:43,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 01:39:43,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:39:43,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-14 01:39:43,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:43,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 01:39:44,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:39:44,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:39:44,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:39:44,403 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 01:39:44,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:44,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-02-14 01:39:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 01:39:44,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:44,484 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_896 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_896) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2023-02-14 01:39:44,489 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_896 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_896) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2023-02-14 01:39:44,497 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_896 (Array Int Int)) (v_ArrVal_895 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_895) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_896) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2023-02-14 01:39:44,503 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_896 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_896) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2023-02-14 01:39:44,509 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_896 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_896) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0)) is different from false [2023-02-14 01:39:44,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:44,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-14 01:39:44,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:44,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2023-02-14 01:39:44,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-14 01:39:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 14 not checked. [2023-02-14 01:39:44,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897549274] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:44,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:44,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 38 [2023-02-14 01:39:44,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841708676] [2023-02-14 01:39:44,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:44,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-14 01:39:44,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:44,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-14 01:39:44,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=979, Unknown=5, NotChecked=330, Total=1406 [2023-02-14 01:39:44,741 INFO L87 Difference]: Start difference. First operand 165 states and 178 transitions. Second operand has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:47,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:47,047 INFO L93 Difference]: Finished difference Result 290 states and 304 transitions. [2023-02-14 01:39:47,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-14 01:39:47,049 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 states have internal predecessors, (116), 0 states have call successors, (0), 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 50 [2023-02-14 01:39:47,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:47,049 INFO L225 Difference]: With dead ends: 290 [2023-02-14 01:39:47,049 INFO L226 Difference]: Without dead ends: 260 [2023-02-14 01:39:47,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=470, Invalid=4644, Unknown=18, NotChecked=720, Total=5852 [2023-02-14 01:39:47,051 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 294 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 12 mSolverCounterUnsat, 75 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 75 IncrementalHoareTripleChecker+Unknown, 703 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:47,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 1418 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1376 Invalid, 75 Unknown, 703 Unchecked, 0.8s Time] [2023-02-14 01:39:47,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-14 01:39:47,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 182. [2023-02-14 01:39:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 178 states have (on average 1.101123595505618) internal successors, (196), 181 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:47,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 196 transitions. [2023-02-14 01:39:47,055 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 196 transitions. Word has length 50 [2023-02-14 01:39:47,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:47,055 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 196 transitions. [2023-02-14 01:39:47,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:47,055 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 196 transitions. [2023-02-14 01:39:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 01:39:47,055 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:47,055 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 01:39:47,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-14 01:39:47,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-02-14 01:39:47,269 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:47,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:47,269 INFO L85 PathProgramCache]: Analyzing trace with hash -172281339, now seen corresponding path program 5 times [2023-02-14 01:39:47,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:47,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976382135] [2023-02-14 01:39:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:47,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:39:47,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:47,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976382135] [2023-02-14 01:39:47,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976382135] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:47,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840752503] [2023-02-14 01:39:47,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 01:39:47,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:47,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:47,625 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:39:47,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 01:39:47,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-14 01:39:47,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:39:47,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-14 01:39:47,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:47,762 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:39:47,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-14 01:39:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:39:47,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:39:48,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840752503] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:48,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:48,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2023-02-14 01:39:48,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139369536] [2023-02-14 01:39:48,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:48,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 01:39:48,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:48,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 01:39:48,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2023-02-14 01:39:48,315 INFO L87 Difference]: Start difference. First operand 182 states and 196 transitions. Second operand has 29 states, 28 states have (on average 4.25) internal successors, (119), 29 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:48,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:48,690 INFO L93 Difference]: Finished difference Result 221 states and 236 transitions. [2023-02-14 01:39:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 01:39:48,691 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.25) internal successors, (119), 29 states have internal predecessors, (119), 0 states have call successors, (0), 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 52 [2023-02-14 01:39:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:48,692 INFO L225 Difference]: With dead ends: 221 [2023-02-14 01:39:48,692 INFO L226 Difference]: Without dead ends: 221 [2023-02-14 01:39:48,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=361, Invalid=1279, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 01:39:48,693 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 527 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:48,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 411 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 01:39:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-02-14 01:39:48,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 188. [2023-02-14 01:39:48,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.108695652173913) internal successors, (204), 187 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:48,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 204 transitions. [2023-02-14 01:39:48,697 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 204 transitions. Word has length 52 [2023-02-14 01:39:48,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:48,697 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 204 transitions. [2023-02-14 01:39:48,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.25) internal successors, (119), 29 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:48,697 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 204 transitions. [2023-02-14 01:39:48,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 01:39:48,698 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:48,698 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 01:39:48,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 01:39:48,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:48,905 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:48,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:48,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1515833686, now seen corresponding path program 6 times [2023-02-14 01:39:48,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:48,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345927919] [2023-02-14 01:39:48,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:48,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:49,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:49,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345927919] [2023-02-14 01:39:49,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345927919] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:49,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265594044] [2023-02-14 01:39:49,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 01:39:49,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:49,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:49,284 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:39:49,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 01:39:49,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-14 01:39:49,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:39:49,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-14 01:39:49,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:49,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:49,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-02-14 01:39:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:39:49,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265594044] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:49,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:49,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2023-02-14 01:39:49,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569454260] [2023-02-14 01:39:49,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:49,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 01:39:49,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:49,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 01:39:49,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 01:39:49,972 INFO L87 Difference]: Start difference. First operand 188 states and 204 transitions. Second operand has 34 states, 33 states have (on average 4.03030303030303) internal successors, (133), 34 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:50,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:39:50,535 INFO L93 Difference]: Finished difference Result 303 states and 323 transitions. [2023-02-14 01:39:50,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 01:39:50,535 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.03030303030303) internal successors, (133), 34 states have internal predecessors, (133), 0 states have call successors, (0), 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 [2023-02-14 01:39:50,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:39:50,536 INFO L225 Difference]: With dead ends: 303 [2023-02-14 01:39:50,536 INFO L226 Difference]: Without dead ends: 303 [2023-02-14 01:39:50,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=1856, Unknown=0, NotChecked=0, Total=2352 [2023-02-14 01:39:50,537 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 391 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 01:39:50,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 721 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 01:39:50,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-02-14 01:39:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 250. [2023-02-14 01:39:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 246 states have (on average 1.1016260162601625) internal successors, (271), 249 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 271 transitions. [2023-02-14 01:39:50,541 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 271 transitions. Word has length 53 [2023-02-14 01:39:50,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:39:50,542 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 271 transitions. [2023-02-14 01:39:50,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.03030303030303) internal successors, (133), 34 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:39:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 271 transitions. [2023-02-14 01:39:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-14 01:39:50,542 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:39:50,542 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 01:39:50,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-14 01:39:50,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-02-14 01:39:50,743 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:39:50,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:39:50,743 INFO L85 PathProgramCache]: Analyzing trace with hash 52598959, now seen corresponding path program 7 times [2023-02-14 01:39:50,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:39:50,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761412683] [2023-02-14 01:39:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:39:50,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:39:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:39:52,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:39:52,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761412683] [2023-02-14 01:39:52,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761412683] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:39:52,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022970640] [2023-02-14 01:39:52,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 01:39:52,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:39:52,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:39:52,316 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:39:52,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-14 01:39:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:39:52,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-14 01:39:52,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:39:52,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 01:39:52,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:39:52,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:39:52,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:39:52,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:39:52,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 01:39:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:39:52,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:39:52,987 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1050 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1050) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)))) is different from false [2023-02-14 01:39:57,304 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1050 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1050) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2023-02-14 01:39:57,315 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1048 (Array Int Int)) (v_ArrVal_1050 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1048) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1050) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2023-02-14 01:39:57,321 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1050 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1050) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2023-02-14 01:39:57,327 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1050 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1050) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0)) is different from false [2023-02-14 01:39:57,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:57,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-14 01:39:57,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:39:57,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2023-02-14 01:39:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 9 not checked. [2023-02-14 01:39:57,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022970640] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:39:57,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:39:57,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 18, 18] total 45 [2023-02-14 01:39:57,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98670715] [2023-02-14 01:39:57,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:39:57,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-14 01:39:57,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:39:57,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-14 01:39:57,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1436, Unknown=23, NotChecked=400, Total=1980 [2023-02-14 01:39:57,559 INFO L87 Difference]: Start difference. First operand 250 states and 271 transitions. Second operand has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:00,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:40:00,458 INFO L93 Difference]: Finished difference Result 304 states and 327 transitions. [2023-02-14 01:40:00,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-14 01:40:00,459 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 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 55 [2023-02-14 01:40:00,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:40:00,459 INFO L225 Difference]: With dead ends: 304 [2023-02-14 01:40:00,459 INFO L226 Difference]: Without dead ends: 279 [2023-02-14 01:40:00,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=459, Invalid=3569, Unknown=24, NotChecked=640, Total=4692 [2023-02-14 01:40:00,460 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 466 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 17 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 01:40:00,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 995 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1319 Invalid, 14 Unknown, 419 Unchecked, 0.8s Time] [2023-02-14 01:40:00,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-02-14 01:40:00,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 231. [2023-02-14 01:40:00,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 227 states have (on average 1.1013215859030836) internal successors, (250), 230 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:00,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 250 transitions. [2023-02-14 01:40:00,463 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 250 transitions. Word has length 55 [2023-02-14 01:40:00,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:40:00,464 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 250 transitions. [2023-02-14 01:40:00,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:00,464 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 250 transitions. [2023-02-14 01:40:00,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-14 01:40:00,464 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:40:00,464 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:40:00,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-14 01:40:00,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:40:00,665 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:40:00,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:40:00,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1781474906, now seen corresponding path program 1 times [2023-02-14 01:40:00,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:40:00,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774586259] [2023-02-14 01:40:00,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:40:00,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:40:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:40:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 01:40:00,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:40:00,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774586259] [2023-02-14 01:40:00,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774586259] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:40:00,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18787758] [2023-02-14 01:40:00,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:40:00,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:40:00,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:40:00,958 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:40:00,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-14 01:40:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:40:01,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-14 01:40:01,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:40:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 01:40:01,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:40:01,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 01:40:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 01:40:01,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18787758] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:40:01,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:40:01,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2023-02-14 01:40:01,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424452319] [2023-02-14 01:40:01,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:40:01,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 01:40:01,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:40:01,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 01:40:01,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2023-02-14 01:40:01,486 INFO L87 Difference]: Start difference. First operand 231 states and 250 transitions. Second operand has 26 states, 25 states have (on average 4.0) internal successors, (100), 26 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:40:01,829 INFO L93 Difference]: Finished difference Result 307 states and 326 transitions. [2023-02-14 01:40:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 01:40:01,829 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.0) internal successors, (100), 26 states have internal predecessors, (100), 0 states have call successors, (0), 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 56 [2023-02-14 01:40:01,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:40:01,830 INFO L225 Difference]: With dead ends: 307 [2023-02-14 01:40:01,831 INFO L226 Difference]: Without dead ends: 307 [2023-02-14 01:40:01,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=997, Unknown=0, NotChecked=0, Total=1260 [2023-02-14 01:40:01,831 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 266 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:40:01,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 460 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 01:40:01,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-02-14 01:40:01,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 237. [2023-02-14 01:40:01,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 233 states have (on average 1.0987124463519313) internal successors, (256), 236 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:01,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 256 transitions. [2023-02-14 01:40:01,835 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 256 transitions. Word has length 56 [2023-02-14 01:40:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:40:01,835 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 256 transitions. [2023-02-14 01:40:01,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.0) internal successors, (100), 26 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 256 transitions. [2023-02-14 01:40:01,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-14 01:40:01,836 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:40:01,836 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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] [2023-02-14 01:40:01,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-14 01:40:02,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:40:02,041 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:40:02,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:40:02,041 INFO L85 PathProgramCache]: Analyzing trace with hash 915239870, now seen corresponding path program 8 times [2023-02-14 01:40:02,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:40:02,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978174454] [2023-02-14 01:40:02,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:40:02,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:40:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:40:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:40:02,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:40:02,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978174454] [2023-02-14 01:40:02,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978174454] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:40:02,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357759312] [2023-02-14 01:40:02,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:40:02,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:40:02,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:40:02,697 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:40:02,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-14 01:40:02,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:40:02,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:40:02,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-14 01:40:02,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:40:02,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 01:40:03,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:40:03,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:40:03,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:40:03,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 01:40:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:40:03,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:40:03,336 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (forall ((v_ArrVal_1155 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1155) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0))) is different from false [2023-02-14 01:40:03,391 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1155 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1155) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0)) is different from false [2023-02-14 01:40:03,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:40:03,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-14 01:40:03,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:40:03,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2023-02-14 01:40:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:40:03,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357759312] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:40:03,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:40:03,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 36 [2023-02-14 01:40:03,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884578941] [2023-02-14 01:40:03,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:40:03,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-14 01:40:03,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:40:03,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-14 01:40:03,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1023, Unknown=2, NotChecked=130, Total=1260 [2023-02-14 01:40:03,571 INFO L87 Difference]: Start difference. First operand 237 states and 256 transitions. Second operand has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:04,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:40:04,247 INFO L93 Difference]: Finished difference Result 366 states and 391 transitions. [2023-02-14 01:40:04,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 01:40:04,247 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 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 56 [2023-02-14 01:40:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:40:04,248 INFO L225 Difference]: With dead ends: 366 [2023-02-14 01:40:04,248 INFO L226 Difference]: Without dead ends: 340 [2023-02-14 01:40:04,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=1568, Unknown=2, NotChecked=162, Total=1892 [2023-02-14 01:40:04,249 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 135 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 8 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 01:40:04,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1006 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 887 Invalid, 14 Unknown, 222 Unchecked, 0.4s Time] [2023-02-14 01:40:04,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-02-14 01:40:04,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 270. [2023-02-14 01:40:04,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 266 states have (on average 1.1015037593984962) internal successors, (293), 269 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 293 transitions. [2023-02-14 01:40:04,253 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 293 transitions. Word has length 56 [2023-02-14 01:40:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:40:04,253 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 293 transitions. [2023-02-14 01:40:04,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:04,253 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 293 transitions. [2023-02-14 01:40:04,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-14 01:40:04,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:40:04,254 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2023-02-14 01:40:04,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-14 01:40:04,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:40:04,459 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:40:04,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:40:04,459 INFO L85 PathProgramCache]: Analyzing trace with hash -851967975, now seen corresponding path program 9 times [2023-02-14 01:40:04,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:40:04,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989411606] [2023-02-14 01:40:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:40:04,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:40:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:40:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 01:40:04,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:40:04,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989411606] [2023-02-14 01:40:04,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989411606] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:40:04,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23193718] [2023-02-14 01:40:04,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 01:40:04,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:40:04,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:40:04,669 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:40:04,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-14 01:40:04,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 01:40:04,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:40:04,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-14 01:40:04,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:40:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-14 01:40:05,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:40:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-14 01:40:05,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23193718] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:40:05,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:40:05,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2023-02-14 01:40:05,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831612699] [2023-02-14 01:40:05,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:40:05,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 01:40:05,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:40:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 01:40:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2023-02-14 01:40:05,468 INFO L87 Difference]: Start difference. First operand 270 states and 293 transitions. Second operand has 29 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 29 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:40:06,696 INFO L93 Difference]: Finished difference Result 436 states and 465 transitions. [2023-02-14 01:40:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-14 01:40:06,696 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 29 states have internal predecessors, (112), 0 states have call successors, (0), 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 57 [2023-02-14 01:40:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:40:06,697 INFO L225 Difference]: With dead ends: 436 [2023-02-14 01:40:06,697 INFO L226 Difference]: Without dead ends: 389 [2023-02-14 01:40:06,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=754, Invalid=3278, Unknown=0, NotChecked=0, Total=4032 [2023-02-14 01:40:06,698 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 630 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 01:40:06,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 851 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 01:40:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-02-14 01:40:06,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 275. [2023-02-14 01:40:06,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 271 states have (on average 1.084870848708487) internal successors, (294), 274 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 294 transitions. [2023-02-14 01:40:06,702 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 294 transitions. Word has length 57 [2023-02-14 01:40:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:40:06,702 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 294 transitions. [2023-02-14 01:40:06,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 29 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 294 transitions. [2023-02-14 01:40:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-14 01:40:06,703 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:40:06,703 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:40:06,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-14 01:40:06,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:40:06,912 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:40:06,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:40:06,912 INFO L85 PathProgramCache]: Analyzing trace with hash 219280577, now seen corresponding path program 4 times [2023-02-14 01:40:06,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:40:06,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382633610] [2023-02-14 01:40:06,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:40:06,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:40:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:40:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 01:40:07,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:40:07,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382633610] [2023-02-14 01:40:07,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382633610] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:40:07,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437572323] [2023-02-14 01:40:07,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 01:40:07,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:40:07,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:40:07,295 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:40:07,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-14 01:40:07,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 01:40:07,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:40:07,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-14 01:40:07,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:40:07,543 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:40:07,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-14 01:40:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 01:40:07,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:40:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 01:40:08,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437572323] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:40:08,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:40:08,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2023-02-14 01:40:08,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254798327] [2023-02-14 01:40:08,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:40:08,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 01:40:08,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:40:08,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 01:40:08,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2023-02-14 01:40:08,209 INFO L87 Difference]: Start difference. First operand 275 states and 294 transitions. Second operand has 29 states, 28 states have (on average 4.107142857142857) internal successors, (115), 29 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:08,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:40:08,604 INFO L93 Difference]: Finished difference Result 280 states and 298 transitions. [2023-02-14 01:40:08,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 01:40:08,605 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.107142857142857) internal successors, (115), 29 states have internal predecessors, (115), 0 states have call successors, (0), 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 58 [2023-02-14 01:40:08,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:40:08,606 INFO L225 Difference]: With dead ends: 280 [2023-02-14 01:40:08,606 INFO L226 Difference]: Without dead ends: 280 [2023-02-14 01:40:08,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=348, Invalid=1212, Unknown=0, NotChecked=0, Total=1560 [2023-02-14 01:40:08,606 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 550 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:40:08,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 302 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 01:40:08,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-02-14 01:40:08,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2023-02-14 01:40:08,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 272 states have (on average 1.0808823529411764) internal successors, (294), 275 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:08,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 294 transitions. [2023-02-14 01:40:08,610 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 294 transitions. Word has length 58 [2023-02-14 01:40:08,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:40:08,611 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 294 transitions. [2023-02-14 01:40:08,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.107142857142857) internal successors, (115), 29 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:08,611 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 294 transitions. [2023-02-14 01:40:08,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-14 01:40:08,612 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:40:08,612 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:40:08,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-14 01:40:08,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-02-14 01:40:08,817 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:40:08,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:40:08,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1792236691, now seen corresponding path program 2 times [2023-02-14 01:40:08,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:40:08,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60706139] [2023-02-14 01:40:08,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:40:08,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:40:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:40:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 01:40:09,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:40:09,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60706139] [2023-02-14 01:40:09,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60706139] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:40:09,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838500302] [2023-02-14 01:40:09,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:40:09,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:40:09,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:40:09,131 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:40:09,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-14 01:40:09,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:40:09,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:40:09,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-14 01:40:09,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:40:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 01:40:09,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:40:09,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 01:40:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 01:40:09,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838500302] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:40:09,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:40:09,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2023-02-14 01:40:09,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048282298] [2023-02-14 01:40:09,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:40:09,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-14 01:40:09,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:40:09,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-14 01:40:09,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2023-02-14 01:40:09,685 INFO L87 Difference]: Start difference. First operand 276 states and 294 transitions. Second operand has 32 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:10,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:40:10,675 INFO L93 Difference]: Finished difference Result 343 states and 360 transitions. [2023-02-14 01:40:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-14 01:40:10,676 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 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 59 [2023-02-14 01:40:10,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:40:10,677 INFO L225 Difference]: With dead ends: 343 [2023-02-14 01:40:10,677 INFO L226 Difference]: Without dead ends: 343 [2023-02-14 01:40:10,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=2640, Unknown=0, NotChecked=0, Total=3422 [2023-02-14 01:40:10,678 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 674 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 01:40:10,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 657 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 01:40:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-02-14 01:40:10,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 282. [2023-02-14 01:40:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 278 states have (on average 1.079136690647482) internal successors, (300), 281 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:10,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 300 transitions. [2023-02-14 01:40:10,685 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 300 transitions. Word has length 59 [2023-02-14 01:40:10,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:40:10,685 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 300 transitions. [2023-02-14 01:40:10,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 300 transitions. [2023-02-14 01:40:10,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-14 01:40:10,686 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:40:10,686 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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] [2023-02-14 01:40:10,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-14 01:40:10,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-02-14 01:40:10,893 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:40:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:40:10,893 INFO L85 PathProgramCache]: Analyzing trace with hash 483795931, now seen corresponding path program 10 times [2023-02-14 01:40:10,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:40:10,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122483465] [2023-02-14 01:40:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:40:10,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:40:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:40:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 15 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:40:11,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:40:11,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122483465] [2023-02-14 01:40:11,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122483465] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:40:11,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123957758] [2023-02-14 01:40:11,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 01:40:11,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:40:11,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:40:11,393 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:40:11,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-14 01:40:11,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 01:40:11,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:40:11,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-14 01:40:11,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:40:11,547 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:40:11,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-14 01:40:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:40:11,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:40:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:40:12,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123957758] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:40:12,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:40:12,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2023-02-14 01:40:12,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460223295] [2023-02-14 01:40:12,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:40:12,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-14 01:40:12,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:40:12,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-14 01:40:12,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1929, Unknown=0, NotChecked=0, Total=2162 [2023-02-14 01:40:12,370 INFO L87 Difference]: Start difference. First operand 282 states and 300 transitions. Second operand has 47 states, 46 states have (on average 3.739130434782609) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:13,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:40:13,274 INFO L93 Difference]: Finished difference Result 450 states and 479 transitions. [2023-02-14 01:40:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 01:40:13,274 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.739130434782609) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 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 60 [2023-02-14 01:40:13,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:40:13,275 INFO L225 Difference]: With dead ends: 450 [2023-02-14 01:40:13,276 INFO L226 Difference]: Without dead ends: 450 [2023-02-14 01:40:13,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=724, Invalid=3308, Unknown=0, NotChecked=0, Total=4032 [2023-02-14 01:40:13,277 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 516 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 01:40:13,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 810 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 01:40:13,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2023-02-14 01:40:13,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 384. [2023-02-14 01:40:13,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 380 states have (on average 1.0842105263157895) internal successors, (412), 383 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:13,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 412 transitions. [2023-02-14 01:40:13,281 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 412 transitions. Word has length 60 [2023-02-14 01:40:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:40:13,281 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 412 transitions. [2023-02-14 01:40:13,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.739130434782609) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:13,281 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 412 transitions. [2023-02-14 01:40:13,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-14 01:40:13,282 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:40:13,282 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:40:13,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-14 01:40:13,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-02-14 01:40:13,488 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:40:13,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:40:13,488 INFO L85 PathProgramCache]: Analyzing trace with hash 257915321, now seen corresponding path program 11 times [2023-02-14 01:40:13,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:40:13,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246755925] [2023-02-14 01:40:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:40:13,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:40:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:40:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:40:14,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:40:14,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246755925] [2023-02-14 01:40:14,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246755925] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:40:14,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423197742] [2023-02-14 01:40:14,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 01:40:14,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:40:14,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:40:14,903 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:40:14,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-14 01:40:15,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-14 01:40:15,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:40:15,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-14 01:40:15,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:40:15,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 01:40:15,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:40:15,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:40:15,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:40:15,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:40:16,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:40:16,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 01:40:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 01:40:16,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:40:16,066 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1442) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2023-02-14 01:40:18,213 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1442) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2023-02-14 01:40:22,398 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1442) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2023-02-14 01:40:26,534 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1442) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2023-02-14 01:40:26,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:40:26,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-14 01:40:26,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:40:26,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2023-02-14 01:40:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 15 not checked. [2023-02-14 01:40:26,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423197742] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:40:26,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:40:26,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19, 19] total 52 [2023-02-14 01:40:26,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651924708] [2023-02-14 01:40:26,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:40:26,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-14 01:40:26,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:40:26,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-14 01:40:26,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2057, Unknown=69, NotChecked=380, Total=2652 [2023-02-14 01:40:26,844 INFO L87 Difference]: Start difference. First operand 384 states and 412 transitions. Second operand has 52 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 52 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:32,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:40:32,514 INFO L93 Difference]: Finished difference Result 413 states and 441 transitions. [2023-02-14 01:40:32,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-14 01:40:32,514 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 52 states have internal predecessors, (133), 0 states have call successors, (0), 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 61 [2023-02-14 01:40:32,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:40:32,516 INFO L225 Difference]: With dead ends: 413 [2023-02-14 01:40:32,516 INFO L226 Difference]: Without dead ends: 380 [2023-02-14 01:40:32,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 95 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=779, Invalid=6640, Unknown=79, NotChecked=692, Total=8190 [2023-02-14 01:40:32,517 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 451 mSDsluCounter, 1223 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 31 mSolverCounterUnsat, 43 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 43 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 01:40:32,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 1264 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1326 Invalid, 43 Unknown, 368 Unchecked, 0.8s Time] [2023-02-14 01:40:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-02-14 01:40:32,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 338. [2023-02-14 01:40:32,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 334 states have (on average 1.0868263473053892) internal successors, (363), 337 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 363 transitions. [2023-02-14 01:40:32,521 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 363 transitions. Word has length 61 [2023-02-14 01:40:32,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:40:32,522 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 363 transitions. [2023-02-14 01:40:32,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 52 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:32,522 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 363 transitions. [2023-02-14 01:40:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-14 01:40:32,523 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:40:32,523 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 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] [2023-02-14 01:40:32,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-14 01:40:32,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:40:32,729 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:40:32,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:40:32,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1306777250, now seen corresponding path program 12 times [2023-02-14 01:40:32,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:40:32,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137235357] [2023-02-14 01:40:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:40:32,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:40:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:40:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:40:33,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:40:33,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137235357] [2023-02-14 01:40:33,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137235357] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:40:33,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406387390] [2023-02-14 01:40:33,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 01:40:33,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:40:33,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:40:33,426 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:40:33,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-14 01:40:33,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-14 01:40:33,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:40:33,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-14 01:40:33,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:40:33,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 01:40:33,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-14 01:40:33,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:40:33,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:40:34,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:40:34,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:40:34,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:40:34,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2023-02-14 01:40:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:40:34,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:40:35,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:40:35,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-14 01:40:35,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:40:35,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2023-02-14 01:40:35,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-14 01:40:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:40:35,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406387390] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:40:35,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:40:35,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 59 [2023-02-14 01:40:35,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171276353] [2023-02-14 01:40:35,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:40:35,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-14 01:40:35,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:40:35,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-14 01:40:35,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=3147, Unknown=2, NotChecked=0, Total=3422 [2023-02-14 01:40:35,973 INFO L87 Difference]: Start difference. First operand 338 states and 363 transitions. Second operand has 59 states, 59 states have (on average 2.8135593220338984) internal successors, (166), 59 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:39,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 01:40:45,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:40:45,212 INFO L93 Difference]: Finished difference Result 418 states and 445 transitions. [2023-02-14 01:40:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-14 01:40:45,212 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.8135593220338984) internal successors, (166), 59 states have internal predecessors, (166), 0 states have call successors, (0), 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 62 [2023-02-14 01:40:45,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:40:45,213 INFO L225 Difference]: With dead ends: 418 [2023-02-14 01:40:45,213 INFO L226 Difference]: Without dead ends: 390 [2023-02-14 01:40:45,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1357, Invalid=9147, Unknown=2, NotChecked=0, Total=10506 [2023-02-14 01:40:45,215 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1230 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 25 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 1334 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-02-14 01:40:45,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1230 Valid, 1334 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1781 Invalid, 3 Unknown, 0 Unchecked, 4.6s Time] [2023-02-14 01:40:45,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-02-14 01:40:45,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 334. [2023-02-14 01:40:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 330 states have (on average 1.0818181818181818) internal successors, (357), 333 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:45,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 357 transitions. [2023-02-14 01:40:45,220 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 357 transitions. Word has length 62 [2023-02-14 01:40:45,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:40:45,220 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 357 transitions. [2023-02-14 01:40:45,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.8135593220338984) internal successors, (166), 59 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:40:45,220 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 357 transitions. [2023-02-14 01:40:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-14 01:40:45,221 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:40:45,221 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:40:45,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-14 01:40:45,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-02-14 01:40:45,436 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:40:45,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:40:45,436 INFO L85 PathProgramCache]: Analyzing trace with hash 506250430, now seen corresponding path program 5 times [2023-02-14 01:40:45,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:40:45,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953409515] [2023-02-14 01:40:45,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:40:45,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:40:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:40:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 01:40:45,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:40:45,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953409515] [2023-02-14 01:40:45,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953409515] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:40:45,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950490287] [2023-02-14 01:40:45,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 01:40:45,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:40:45,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:40:45,692 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:40:45,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-14 01:40:45,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-14 01:40:45,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:40:45,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 86 conjunts are in the unsatisfiable core [2023-02-14 01:40:45,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:40:45,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 01:40:45,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-14 01:40:46,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:40:46,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:40:46,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:40:46,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:40:46,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:40:46,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2023-02-14 01:40:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 01:40:46,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:40:51,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:40:51,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-14 01:40:51,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:40:51,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2023-02-14 01:40:51,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 01:40:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 01:40:52,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950490287] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:40:52,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:40:52,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 49 [2023-02-14 01:40:52,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854682993] [2023-02-14 01:40:52,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:40:52,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-14 01:40:52,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:40:52,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-14 01:40:52,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2181, Unknown=4, NotChecked=0, Total=2352 [2023-02-14 01:40:52,077 INFO L87 Difference]: Start difference. First operand 334 states and 357 transitions. Second operand has 49 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 49 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:00,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 01:41:02,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 01:41:06,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 01:41:08,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:41:08,869 INFO L93 Difference]: Finished difference Result 463 states and 485 transitions. [2023-02-14 01:41:08,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-14 01:41:08,870 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 49 states have internal predecessors, (149), 0 states have call successors, (0), 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 63 [2023-02-14 01:41:08,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:41:08,871 INFO L225 Difference]: With dead ends: 463 [2023-02-14 01:41:08,871 INFO L226 Difference]: Without dead ends: 463 [2023-02-14 01:41:08,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2820 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=1737, Invalid=12779, Unknown=4, NotChecked=0, Total=14520 [2023-02-14 01:41:08,872 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 928 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 3061 mSolverCounterSat, 56 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 3119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3061 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-02-14 01:41:08,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 1371 Invalid, 3119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3061 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2023-02-14 01:41:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-02-14 01:41:08,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 357. [2023-02-14 01:41:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 353 states have (on average 1.0736543909348442) internal successors, (379), 356 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 379 transitions. [2023-02-14 01:41:08,877 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 379 transitions. Word has length 63 [2023-02-14 01:41:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:41:08,878 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 379 transitions. [2023-02-14 01:41:08,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 49 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 379 transitions. [2023-02-14 01:41:08,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-14 01:41:08,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:41:08,879 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 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] [2023-02-14 01:41:08,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-14 01:41:09,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-02-14 01:41:09,085 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:41:09,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:41:09,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1145614567, now seen corresponding path program 13 times [2023-02-14 01:41:09,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:41:09,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834274848] [2023-02-14 01:41:09,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:41:09,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:41:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:41:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:41:09,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:41:09,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834274848] [2023-02-14 01:41:09,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834274848] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:41:09,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289781395] [2023-02-14 01:41:09,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 01:41:09,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:41:09,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:41:09,721 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:41:09,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-14 01:41:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:41:09,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-14 01:41:09,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:41:09,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 01:41:10,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:41:10,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 01:41:10,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:41:10,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 01:41:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:41:10,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:41:10,500 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1628 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1628) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0)) is different from false [2023-02-14 01:41:10,506 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:41:10,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-14 01:41:10,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:41:10,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2023-02-14 01:41:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:41:10,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289781395] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:41:10,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:41:10,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 39 [2023-02-14 01:41:10,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399481419] [2023-02-14 01:41:10,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:41:10,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-14 01:41:10,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:41:10,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-14 01:41:10,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1282, Unknown=11, NotChecked=72, Total=1482 [2023-02-14 01:41:10,721 INFO L87 Difference]: Start difference. First operand 357 states and 379 transitions. Second operand has 39 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 39 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:11,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:41:11,772 INFO L93 Difference]: Finished difference Result 524 states and 553 transitions. [2023-02-14 01:41:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 01:41:11,773 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 39 states have internal predecessors, (113), 0 states have call successors, (0), 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 63 [2023-02-14 01:41:11,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:41:11,774 INFO L225 Difference]: With dead ends: 524 [2023-02-14 01:41:11,774 INFO L226 Difference]: Without dead ends: 495 [2023-02-14 01:41:11,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 106 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=178, Invalid=1977, Unknown=11, NotChecked=90, Total=2256 [2023-02-14 01:41:11,775 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 84 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 01:41:11,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 1719 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1468 Invalid, 1 Unknown, 124 Unchecked, 0.7s Time] [2023-02-14 01:41:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2023-02-14 01:41:11,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 367. [2023-02-14 01:41:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 363 states have (on average 1.0743801652892562) internal successors, (390), 366 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 390 transitions. [2023-02-14 01:41:11,780 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 390 transitions. Word has length 63 [2023-02-14 01:41:11,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:41:11,780 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 390 transitions. [2023-02-14 01:41:11,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 39 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 390 transitions. [2023-02-14 01:41:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-14 01:41:11,781 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:41:11,781 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:41:11,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-14 01:41:11,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:41:11,987 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:41:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:41:11,987 INFO L85 PathProgramCache]: Analyzing trace with hash -95303595, now seen corresponding path program 1 times [2023-02-14 01:41:11,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:41:11,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835916988] [2023-02-14 01:41:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:41:11,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:41:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:41:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:41:12,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:41:12,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835916988] [2023-02-14 01:41:12,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835916988] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:41:12,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221505576] [2023-02-14 01:41:12,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:41:12,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:41:12,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:41:12,862 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:41:12,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-14 01:41:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:41:13,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 97 conjunts are in the unsatisfiable core [2023-02-14 01:41:13,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:41:13,016 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:41:13,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-14 01:41:13,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:41:13,452 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:41:13,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2023-02-14 01:41:13,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2023-02-14 01:41:13,622 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:41:13,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2023-02-14 01:41:13,801 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:41:13,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2023-02-14 01:41:13,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:41:13,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2023-02-14 01:41:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 01:41:14,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:41:17,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:41:17,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-14 01:41:17,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:41:17,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2023-02-14 01:41:17,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 01:41:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 01:41:17,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221505576] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:41:17,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:41:17,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 65 [2023-02-14 01:41:17,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140357074] [2023-02-14 01:41:17,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:41:17,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-14 01:41:17,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:41:17,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-14 01:41:17,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3910, Unknown=2, NotChecked=0, Total=4160 [2023-02-14 01:41:17,922 INFO L87 Difference]: Start difference. First operand 367 states and 390 transitions. Second operand has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:19,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:41:19,895 INFO L93 Difference]: Finished difference Result 360 states and 380 transitions. [2023-02-14 01:41:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-14 01:41:19,895 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 0 states have call successors, (0), 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 67 [2023-02-14 01:41:19,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:41:19,896 INFO L225 Difference]: With dead ends: 360 [2023-02-14 01:41:19,896 INFO L226 Difference]: Without dead ends: 290 [2023-02-14 01:41:19,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=501, Invalid=6469, Unknown=2, NotChecked=0, Total=6972 [2023-02-14 01:41:19,897 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 221 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 01:41:19,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 794 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 01:41:19,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-02-14 01:41:19,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2023-02-14 01:41:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 286 states have (on average 1.0804195804195804) internal successors, (309), 289 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:19,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 309 transitions. [2023-02-14 01:41:19,901 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 309 transitions. Word has length 67 [2023-02-14 01:41:19,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:41:19,901 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 309 transitions. [2023-02-14 01:41:19,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:19,901 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 309 transitions. [2023-02-14 01:41:19,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-14 01:41:19,902 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:41:19,902 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 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] [2023-02-14 01:41:19,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-14 01:41:20,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:41:20,108 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:41:20,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:41:20,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1204466780, now seen corresponding path program 14 times [2023-02-14 01:41:20,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:41:20,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937452636] [2023-02-14 01:41:20,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:41:20,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:41:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:41:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 28 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:41:20,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:41:20,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937452636] [2023-02-14 01:41:20,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937452636] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:41:20,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049120675] [2023-02-14 01:41:20,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:41:20,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:41:20,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:41:20,615 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:41:20,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-14 01:41:20,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:41:20,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:41:20,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-14 01:41:20,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:41:20,764 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:41:20,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-14 01:41:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 45 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:41:21,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:41:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 45 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:41:21,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049120675] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:41:21,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:41:21,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2023-02-14 01:41:21,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687356257] [2023-02-14 01:41:21,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:41:21,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-14 01:41:21,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:41:21,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-14 01:41:21,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2023-02-14 01:41:21,693 INFO L87 Difference]: Start difference. First operand 290 states and 309 transitions. Second operand has 46 states, 45 states have (on average 3.7555555555555555) internal successors, (169), 46 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:41:23,019 INFO L93 Difference]: Finished difference Result 494 states and 524 transitions. [2023-02-14 01:41:23,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-14 01:41:23,019 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.7555555555555555) internal successors, (169), 46 states have internal predecessors, (169), 0 states have call successors, (0), 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 67 [2023-02-14 01:41:23,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:41:23,021 INFO L225 Difference]: With dead ends: 494 [2023-02-14 01:41:23,021 INFO L226 Difference]: Without dead ends: 494 [2023-02-14 01:41:23,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=834, Invalid=3326, Unknown=0, NotChecked=0, Total=4160 [2023-02-14 01:41:23,021 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 456 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 01:41:23,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 1300 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 01:41:23,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-02-14 01:41:23,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 382. [2023-02-14 01:41:23,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 378 states have (on average 1.08994708994709) internal successors, (412), 381 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 412 transitions. [2023-02-14 01:41:23,026 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 412 transitions. Word has length 67 [2023-02-14 01:41:23,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:41:23,026 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 412 transitions. [2023-02-14 01:41:23,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.7555555555555555) internal successors, (169), 46 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:23,027 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 412 transitions. [2023-02-14 01:41:23,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-14 01:41:23,028 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:41:23,028 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:41:23,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-14 01:41:23,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-02-14 01:41:23,234 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:41:23,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:41:23,235 INFO L85 PathProgramCache]: Analyzing trace with hash -303036520, now seen corresponding path program 15 times [2023-02-14 01:41:23,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:41:23,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585347006] [2023-02-14 01:41:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:41:23,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:41:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:41:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:41:25,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:41:25,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585347006] [2023-02-14 01:41:25,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585347006] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:41:25,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240263138] [2023-02-14 01:41:25,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 01:41:25,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:41:25,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:41:25,137 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:41:25,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-14 01:41:25,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 01:41:25,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:41:25,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 127 conjunts are in the unsatisfiable core [2023-02-14 01:41:25,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:41:25,376 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:41:25,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-14 01:41:25,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:41:25,963 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:41:25,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-14 01:41:25,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-14 01:41:26,180 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:41:26,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 41 [2023-02-14 01:41:26,201 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-14 01:41:26,491 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:41:26,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2023-02-14 01:41:26,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:41:26,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2023-02-14 01:41:26,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 01:41:26,797 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2023-02-14 01:41:26,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 60 [2023-02-14 01:41:27,333 INFO L321 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2023-02-14 01:41:27,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 38 [2023-02-14 01:41:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 01:41:27,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:41:28,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:41:28,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2023-02-14 01:41:29,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:41:29,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 48 [2023-02-14 01:41:29,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:41:29,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 86 [2023-02-14 01:41:29,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:41:29,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2023-02-14 01:41:29,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 01:41:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-14 01:41:30,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240263138] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:41:30,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:41:30,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 25, 23] total 78 [2023-02-14 01:41:30,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983208463] [2023-02-14 01:41:30,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:41:30,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-02-14 01:41:30,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:41:30,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-02-14 01:41:30,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=5612, Unknown=9, NotChecked=0, Total=6006 [2023-02-14 01:41:30,362 INFO L87 Difference]: Start difference. First operand 382 states and 412 transitions. Second operand has 78 states, 78 states have (on average 2.282051282051282) internal successors, (178), 78 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:41:52,299 INFO L93 Difference]: Finished difference Result 539 states and 569 transitions. [2023-02-14 01:41:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-02-14 01:41:52,299 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.282051282051282) internal successors, (178), 78 states have internal predecessors, (178), 0 states have call successors, (0), 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 68 [2023-02-14 01:41:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:41:52,301 INFO L225 Difference]: With dead ends: 539 [2023-02-14 01:41:52,301 INFO L226 Difference]: Without dead ends: 509 [2023-02-14 01:41:52,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8043 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=3919, Invalid=33896, Unknown=15, NotChecked=0, Total=37830 [2023-02-14 01:41:52,304 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1526 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 3087 mSolverCounterSat, 86 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3087 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:41:52,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1526 Valid, 1330 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3087 Invalid, 4 Unknown, 0 Unchecked, 2.2s Time] [2023-02-14 01:41:52,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-02-14 01:41:52,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 350. [2023-02-14 01:41:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 346 states have (on average 1.0982658959537572) internal successors, (380), 349 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 380 transitions. [2023-02-14 01:41:52,311 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 380 transitions. Word has length 68 [2023-02-14 01:41:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:41:52,311 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 380 transitions. [2023-02-14 01:41:52,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.282051282051282) internal successors, (178), 78 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 380 transitions. [2023-02-14 01:41:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-14 01:41:52,312 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:41:52,312 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 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] [2023-02-14 01:41:52,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-14 01:41:52,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:41:52,518 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:41:52,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:41:52,519 INFO L85 PathProgramCache]: Analyzing trace with hash -107089035, now seen corresponding path program 16 times [2023-02-14 01:41:52,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:41:52,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269521960] [2023-02-14 01:41:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:41:52,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:41:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:41:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:41:53,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:41:53,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269521960] [2023-02-14 01:41:53,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269521960] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:41:53,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276260904] [2023-02-14 01:41:53,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 01:41:53,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:41:53,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:41:53,257 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:41:53,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-14 01:41:53,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 01:41:53,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:41:53,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 127 conjunts are in the unsatisfiable core [2023-02-14 01:41:53,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:41:53,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:41:54,054 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:41:54,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-14 01:41:54,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-14 01:41:54,258 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:41:54,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 33 [2023-02-14 01:41:54,395 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-02-14 01:41:54,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 35 [2023-02-14 01:41:54,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 01:41:54,907 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 01:41:54,915 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 01:41:54,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 21 [2023-02-14 01:41:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:41:54,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:41:55,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:41:55,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2023-02-14 01:41:55,562 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:41:55,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-02-14 01:41:55,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:41:55,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 59 [2023-02-14 01:41:55,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:41:55,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 37 [2023-02-14 01:41:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 11 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 01:41:56,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276260904] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:41:56,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:41:56,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2023-02-14 01:41:56,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675736785] [2023-02-14 01:41:56,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:41:56,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-14 01:41:56,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:41:56,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-14 01:41:56,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=3675, Unknown=16, NotChecked=0, Total=3906 [2023-02-14 01:41:56,618 INFO L87 Difference]: Start difference. First operand 350 states and 380 transitions. Second operand has 63 states, 63 states have (on average 2.746031746031746) internal successors, (173), 63 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:59,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:41:59,068 INFO L93 Difference]: Finished difference Result 494 states and 527 transitions. [2023-02-14 01:41:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-14 01:41:59,068 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.746031746031746) internal successors, (173), 63 states have internal predecessors, (173), 0 states have call successors, (0), 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 69 [2023-02-14 01:41:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:41:59,069 INFO L225 Difference]: With dead ends: 494 [2023-02-14 01:41:59,069 INFO L226 Difference]: Without dead ends: 463 [2023-02-14 01:41:59,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=568, Invalid=7417, Unknown=25, NotChecked=0, Total=8010 [2023-02-14 01:41:59,070 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 333 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 15 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 01:41:59,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 1321 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1247 Invalid, 11 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 01:41:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-02-14 01:41:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 346. [2023-02-14 01:41:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 342 states have (on average 1.0935672514619883) internal successors, (374), 345 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 374 transitions. [2023-02-14 01:41:59,075 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 374 transitions. Word has length 69 [2023-02-14 01:41:59,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:41:59,075 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 374 transitions. [2023-02-14 01:41:59,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.746031746031746) internal successors, (173), 63 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:41:59,076 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 374 transitions. [2023-02-14 01:41:59,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-14 01:41:59,077 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:41:59,077 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 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] [2023-02-14 01:41:59,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-14 01:41:59,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-02-14 01:41:59,285 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:41:59,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:41:59,285 INFO L85 PathProgramCache]: Analyzing trace with hash 2113102584, now seen corresponding path program 17 times [2023-02-14 01:41:59,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:41:59,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893264467] [2023-02-14 01:41:59,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:41:59,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:41:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:42:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:42:00,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:42:00,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893264467] [2023-02-14 01:42:00,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893264467] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:42:00,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102483882] [2023-02-14 01:42:00,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 01:42:00,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:42:00,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:42:00,042 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:42:00,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-14 01:42:00,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-14 01:42:00,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:42:00,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 129 conjunts are in the unsatisfiable core [2023-02-14 01:42:00,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:42:00,253 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:42:00,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-14 01:42:00,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:42:00,788 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 01:42:00,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-14 01:42:00,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-14 01:42:00,946 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-02-14 01:42:00,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-02-14 01:42:01,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 01:42:01,715 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2023-02-14 01:42:01,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 26 [2023-02-14 01:42:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:42:01,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:42:02,847 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:42:02,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2023-02-14 01:42:03,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:42:03,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-02-14 01:42:03,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:42:03,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 59 [2023-02-14 01:42:03,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:42:03,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2023-02-14 01:42:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 45 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:42:04,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102483882] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:42:04,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:42:04,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 24] total 72 [2023-02-14 01:42:04,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654220633] [2023-02-14 01:42:04,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:42:04,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-02-14 01:42:04,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:42:04,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-02-14 01:42:04,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=4760, Unknown=2, NotChecked=0, Total=5112 [2023-02-14 01:42:04,718 INFO L87 Difference]: Start difference. First operand 346 states and 374 transitions. Second operand has 72 states, 72 states have (on average 2.8055555555555554) internal successors, (202), 72 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:42:12,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:42:12,091 INFO L93 Difference]: Finished difference Result 682 states and 729 transitions. [2023-02-14 01:42:12,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-02-14 01:42:12,092 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.8055555555555554) internal successors, (202), 72 states have internal predecessors, (202), 0 states have call successors, (0), 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 70 [2023-02-14 01:42:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:42:12,093 INFO L225 Difference]: With dead ends: 682 [2023-02-14 01:42:12,093 INFO L226 Difference]: Without dead ends: 650 [2023-02-14 01:42:12,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2308 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1647, Invalid=15121, Unknown=2, NotChecked=0, Total=16770 [2023-02-14 01:42:12,095 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 746 mSDsluCounter, 2101 mSDsCounter, 0 mSdLazyCounter, 2736 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 2173 SdHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-14 01:42:12,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 2173 Invalid, 2759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2736 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-14 01:42:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2023-02-14 01:42:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 359. [2023-02-14 01:42:12,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 355 states have (on average 1.0929577464788733) internal successors, (388), 358 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:42:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 388 transitions. [2023-02-14 01:42:12,100 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 388 transitions. Word has length 70 [2023-02-14 01:42:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:42:12,101 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 388 transitions. [2023-02-14 01:42:12,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.8055555555555554) internal successors, (202), 72 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:42:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 388 transitions. [2023-02-14 01:42:12,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-14 01:42:12,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:42:12,102 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:42:12,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-14 01:42:12,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:42:12,311 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-02-14 01:42:12,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:42:12,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1112562108, now seen corresponding path program 18 times [2023-02-14 01:42:12,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:42:12,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901058339] [2023-02-14 01:42:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:42:12,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:42:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:42:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:42:13,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:42:13,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901058339] [2023-02-14 01:42:13,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901058339] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:42:13,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067051709] [2023-02-14 01:42:13,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 01:42:13,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:42:13,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:42:13,945 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:42:13,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-14 01:42:14,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-14 01:42:14,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:42:14,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 153 conjunts are in the unsatisfiable core [2023-02-14 01:42:14,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:42:14,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 01:42:14,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-14 01:42:14,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-14 01:42:14,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:42:15,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:42:15,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:42:15,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:42:15,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 01:42:15,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:42:15,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-02-14 01:42:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 01:42:15,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:42:25,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:42:25,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-14 01:42:25,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:42:25,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2023-02-14 01:42:25,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-14 01:42:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 01:42:25,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067051709] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:42:25,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:42:25,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26, 22] total 78 [2023-02-14 01:42:25,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246364968] [2023-02-14 01:42:25,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:42:25,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-02-14 01:42:25,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:42:25,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-02-14 01:42:25,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=5621, Unknown=19, NotChecked=0, Total=6006 [2023-02-14 01:42:25,832 INFO L87 Difference]: Start difference. First operand 359 states and 388 transitions. Second operand has 78 states, 78 states have (on average 2.5384615384615383) internal successors, (198), 78 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 01:42:34,367 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)))) (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |c_ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (let ((.cse2 (select |c_#length| |c_ULTIMATE.start_main_~nondetString2~0#1.base|))) (or (not (<= 0 (+ 3 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (let ((.cse0 (< .cse2 (+ 2 |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)))) (and (or (< 2 |c_ULTIMATE.start_main_~i~0#1|) .cse0) (or .cse1 .cse0))) (<= (+ 6 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) .cse2))) (or (forall ((v_ArrVal_2035 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2035) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) (and (<= (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (<= 0 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)))) .cse1 (< 4 |c_ULTIMATE.start_main_~length~0#1|) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~1#1| 1) (<= (+ |c_ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_#t~post6#1.base|)))) is different from false