./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0521.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 26d01a9c 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/memsafety/test-0521.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 aa94cb741c9c7eaa2ca9bb871f44dd4c619faf21975944b61e221a61ad9730d7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 02:54:02,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 02:54:02,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 02:54:02,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 02:54:02,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 02:54:02,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 02:54:02,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 02:54:02,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 02:54:02,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 02:54:02,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 02:54:02,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 02:54:02,391 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 02:54:02,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 02:54:02,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 02:54:02,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 02:54:02,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 02:54:02,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 02:54:02,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 02:54:02,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 02:54:02,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 02:54:02,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 02:54:02,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 02:54:02,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 02:54:02,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 02:54:02,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 02:54:02,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 02:54:02,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 02:54:02,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 02:54:02,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 02:54:02,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 02:54:02,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 02:54:02,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 02:54:02,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 02:54:02,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 02:54:02,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 02:54:02,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 02:54:02,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 02:54:02,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 02:54:02,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 02:54:02,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 02:54:02,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 02:54:02,421 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 02:54:02,443 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 02:54:02,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 02:54:02,444 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 02:54:02,444 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 02:54:02,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 02:54:02,445 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 02:54:02,445 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 02:54:02,445 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 02:54:02,445 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 02:54:02,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 02:54:02,446 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 02:54:02,446 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 02:54:02,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 02:54:02,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 02:54:02,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 02:54:02,447 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 02:54:02,447 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 02:54:02,447 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 02:54:02,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 02:54:02,447 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 02:54:02,448 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 02:54:02,448 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 02:54:02,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 02:54:02,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 02:54:02,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 02:54:02,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:54:02,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 02:54:02,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 02:54:02,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 02:54:02,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 02:54:02,449 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 02:54:02,449 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 02:54:02,450 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 02:54:02,450 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 02:54:02,450 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa94cb741c9c7eaa2ca9bb871f44dd4c619faf21975944b61e221a61ad9730d7 [2023-02-17 02:54:02,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 02:54:02,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 02:54:02,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 02:54:02,657 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 02:54:02,658 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 02:54:02,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0521.i [2023-02-17 02:54:03,639 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 02:54:03,856 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 02:54:03,856 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0521.i [2023-02-17 02:54:03,865 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/644941758/ba20d637342c422eab58ec12e7a65ef8/FLAG1c463fc7d [2023-02-17 02:54:03,878 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/644941758/ba20d637342c422eab58ec12e7a65ef8 [2023-02-17 02:54:03,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 02:54:03,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 02:54:03,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 02:54:03,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 02:54:03,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 02:54:03,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:54:03" (1/1) ... [2023-02-17 02:54:03,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21353e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:54:03, skipping insertion in model container [2023-02-17 02:54:03,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:54:03" (1/1) ... [2023-02-17 02:54:03,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 02:54:03,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 02:54:04,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:54:04,193 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 02:54:04,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:54:04,269 INFO L208 MainTranslator]: Completed translation [2023-02-17 02:54:04,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:54:04 WrapperNode [2023-02-17 02:54:04,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 02:54:04,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 02:54:04,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 02:54:04,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 02:54:04,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:54:04" (1/1) ... [2023-02-17 02:54:04,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:54:04" (1/1) ... [2023-02-17 02:54:04,308 INFO L138 Inliner]: procedures = 125, calls = 95, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 305 [2023-02-17 02:54:04,314 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 02:54:04,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 02:54:04,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 02:54:04,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 02:54:04,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:54:04" (1/1) ... [2023-02-17 02:54:04,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:54:04" (1/1) ... [2023-02-17 02:54:04,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:54:04" (1/1) ... [2023-02-17 02:54:04,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:54:04" (1/1) ... [2023-02-17 02:54:04,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:54:04" (1/1) ... [2023-02-17 02:54:04,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:54:04" (1/1) ... [2023-02-17 02:54:04,343 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:54:04" (1/1) ... [2023-02-17 02:54:04,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:54:04" (1/1) ... [2023-02-17 02:54:04,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 02:54:04,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 02:54:04,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 02:54:04,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 02:54:04,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:54:04" (1/1) ... [2023-02-17 02:54:04,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:54:04,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:54:04,373 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) [2023-02-17 02:54:04,377 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 [2023-02-17 02:54:04,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 02:54:04,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 02:54:04,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 02:54:04,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 02:54:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 02:54:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 02:54:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 02:54:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 02:54:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 02:54:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 02:54:04,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 02:54:04,554 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 02:54:04,557 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 02:54:05,058 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 02:54:05,070 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 02:54:05,070 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2023-02-17 02:54:05,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:54:05 BoogieIcfgContainer [2023-02-17 02:54:05,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 02:54:05,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 02:54:05,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 02:54:05,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 02:54:05,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 02:54:03" (1/3) ... [2023-02-17 02:54:05,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd6021e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:54:05, skipping insertion in model container [2023-02-17 02:54:05,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:54:04" (2/3) ... [2023-02-17 02:54:05,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd6021e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:54:05, skipping insertion in model container [2023-02-17 02:54:05,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:54:05" (3/3) ... [2023-02-17 02:54:05,078 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0521.i [2023-02-17 02:54:05,091 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 02:54:05,091 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 152 error locations. [2023-02-17 02:54:05,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 02:54:05,126 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;@18150001, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 02:54:05,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 152 error locations. [2023-02-17 02:54:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand has 313 states, 160 states have (on average 2.1875) internal successors, (350), 312 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:05,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-17 02:54:05,133 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:05,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-17 02:54:05,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:05,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:05,137 INFO L85 PathProgramCache]: Analyzing trace with hash 28729512, now seen corresponding path program 1 times [2023-02-17 02:54:05,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:05,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022416963] [2023-02-17 02:54:05,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:05,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:05,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:05,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022416963] [2023-02-17 02:54:05,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022416963] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:05,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:05,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:54:05,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365588074] [2023-02-17 02:54:05,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:05,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 02:54:05,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:05,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 02:54:05,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 02:54:05,270 INFO L87 Difference]: Start difference. First operand has 313 states, 160 states have (on average 2.1875) internal successors, (350), 312 states have internal predecessors, (350), 0 states have call successors, (0), 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 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:05,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:05,310 INFO L93 Difference]: Finished difference Result 313 states and 340 transitions. [2023-02-17 02:54:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 02:54:05,312 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2023-02-17 02:54:05,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:05,326 INFO L225 Difference]: With dead ends: 313 [2023-02-17 02:54:05,326 INFO L226 Difference]: Without dead ends: 311 [2023-02-17 02:54:05,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 02:54:05,331 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:05,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:54:05,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-02-17 02:54:05,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2023-02-17 02:54:05,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 159 states have (on average 2.1257861635220126) internal successors, (338), 310 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 338 transitions. [2023-02-17 02:54:05,387 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 338 transitions. Word has length 5 [2023-02-17 02:54:05,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:05,387 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 338 transitions. [2023-02-17 02:54:05,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:05,387 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 338 transitions. [2023-02-17 02:54:05,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 02:54:05,388 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:05,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 02:54:05,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 02:54:05,389 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:05,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:05,389 INFO L85 PathProgramCache]: Analyzing trace with hash 889570248, now seen corresponding path program 1 times [2023-02-17 02:54:05,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:05,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151049912] [2023-02-17 02:54:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:05,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:05,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:05,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151049912] [2023-02-17 02:54:05,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151049912] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:05,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:05,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:54:05,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233471647] [2023-02-17 02:54:05,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:05,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:54:05,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:05,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:54:05,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:54:05,475 INFO L87 Difference]: Start difference. First operand 311 states and 338 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:05,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:05,669 INFO L93 Difference]: Finished difference Result 295 states and 322 transitions. [2023-02-17 02:54:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:54:05,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-02-17 02:54:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:05,671 INFO L225 Difference]: With dead ends: 295 [2023-02-17 02:54:05,671 INFO L226 Difference]: Without dead ends: 295 [2023-02-17 02:54:05,674 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 [2023-02-17 02:54:05,675 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 77 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:05,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 406 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:54:05,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-02-17 02:54:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2023-02-17 02:54:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 159 states have (on average 2.0251572327044025) internal successors, (322), 294 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 322 transitions. [2023-02-17 02:54:05,688 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 322 transitions. Word has length 6 [2023-02-17 02:54:05,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:05,690 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 322 transitions. [2023-02-17 02:54:05,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:05,691 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 322 transitions. [2023-02-17 02:54:05,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 02:54:05,692 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:05,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 02:54:05,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 02:54:05,693 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:05,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:05,695 INFO L85 PathProgramCache]: Analyzing trace with hash 889570249, now seen corresponding path program 1 times [2023-02-17 02:54:05,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:05,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921913293] [2023-02-17 02:54:05,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:05,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:05,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:05,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921913293] [2023-02-17 02:54:05,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921913293] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:05,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:05,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:54:05,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951095504] [2023-02-17 02:54:05,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:05,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:54:05,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:05,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:54:05,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:54:05,768 INFO L87 Difference]: Start difference. First operand 295 states and 322 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:05,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:05,921 INFO L93 Difference]: Finished difference Result 279 states and 306 transitions. [2023-02-17 02:54:05,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:54:05,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-02-17 02:54:05,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:05,922 INFO L225 Difference]: With dead ends: 279 [2023-02-17 02:54:05,922 INFO L226 Difference]: Without dead ends: 279 [2023-02-17 02:54:05,923 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 [2023-02-17 02:54:05,926 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 61 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:05,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 415 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:54:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-02-17 02:54:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2023-02-17 02:54:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 159 states have (on average 1.9245283018867925) internal successors, (306), 278 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 306 transitions. [2023-02-17 02:54:05,930 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 306 transitions. Word has length 6 [2023-02-17 02:54:05,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:05,930 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 306 transitions. [2023-02-17 02:54:05,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 306 transitions. [2023-02-17 02:54:05,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 02:54:05,931 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:05,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 02:54:05,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 02:54:05,932 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:05,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:05,933 INFO L85 PathProgramCache]: Analyzing trace with hash 889571339, now seen corresponding path program 1 times [2023-02-17 02:54:05,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:05,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004985793] [2023-02-17 02:54:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:05,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:05,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:05,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:05,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004985793] [2023-02-17 02:54:05,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004985793] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:05,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:05,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:54:05,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018349365] [2023-02-17 02:54:05,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:05,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:54:05,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:05,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:54:05,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:54:05,984 INFO L87 Difference]: Start difference. First operand 279 states and 306 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:06,150 INFO L93 Difference]: Finished difference Result 334 states and 370 transitions. [2023-02-17 02:54:06,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:54:06,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-02-17 02:54:06,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:06,152 INFO L225 Difference]: With dead ends: 334 [2023-02-17 02:54:06,152 INFO L226 Difference]: Without dead ends: 334 [2023-02-17 02:54:06,152 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 [2023-02-17 02:54:06,157 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 76 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:06,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 481 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:54:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-02-17 02:54:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 277. [2023-02-17 02:54:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 159 states have (on average 1.9119496855345912) internal successors, (304), 276 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 304 transitions. [2023-02-17 02:54:06,163 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 304 transitions. Word has length 6 [2023-02-17 02:54:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:06,163 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 304 transitions. [2023-02-17 02:54:06,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 304 transitions. [2023-02-17 02:54:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 02:54:06,164 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:06,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 02:54:06,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 02:54:06,164 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:06,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:06,165 INFO L85 PathProgramCache]: Analyzing trace with hash 889571340, now seen corresponding path program 1 times [2023-02-17 02:54:06,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:06,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330780476] [2023-02-17 02:54:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:06,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:06,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:06,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330780476] [2023-02-17 02:54:06,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330780476] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:06,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:06,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:54:06,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128537537] [2023-02-17 02:54:06,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:06,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:54:06,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:06,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:54:06,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:54:06,206 INFO L87 Difference]: Start difference. First operand 277 states and 304 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:06,403 INFO L93 Difference]: Finished difference Result 466 states and 515 transitions. [2023-02-17 02:54:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:54:06,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-02-17 02:54:06,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:06,405 INFO L225 Difference]: With dead ends: 466 [2023-02-17 02:54:06,405 INFO L226 Difference]: Without dead ends: 466 [2023-02-17 02:54:06,405 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 [2023-02-17 02:54:06,405 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 220 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:06,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 579 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:54:06,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-02-17 02:54:06,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 275. [2023-02-17 02:54:06,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 159 states have (on average 1.89937106918239) internal successors, (302), 274 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:06,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 302 transitions. [2023-02-17 02:54:06,409 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 302 transitions. Word has length 6 [2023-02-17 02:54:06,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:06,409 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 302 transitions. [2023-02-17 02:54:06,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:06,410 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 302 transitions. [2023-02-17 02:54:06,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 02:54:06,410 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:06,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:06,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 02:54:06,410 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:06,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:06,410 INFO L85 PathProgramCache]: Analyzing trace with hash 178517033, now seen corresponding path program 1 times [2023-02-17 02:54:06,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:06,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969709428] [2023-02-17 02:54:06,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:06,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:06,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:06,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969709428] [2023-02-17 02:54:06,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969709428] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:06,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:06,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 02:54:06,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430645019] [2023-02-17 02:54:06,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:06,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 02:54:06,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:06,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 02:54:06,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 02:54:06,442 INFO L87 Difference]: Start difference. First operand 275 states and 302 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:06,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:06,481 INFO L93 Difference]: Finished difference Result 678 states and 747 transitions. [2023-02-17 02:54:06,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 02:54:06,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2023-02-17 02:54:06,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:06,483 INFO L225 Difference]: With dead ends: 678 [2023-02-17 02:54:06,483 INFO L226 Difference]: Without dead ends: 678 [2023-02-17 02:54:06,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:54:06,484 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 597 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:06,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 870 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:54:06,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2023-02-17 02:54:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 280. [2023-02-17 02:54:06,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 164 states have (on average 1.8780487804878048) internal successors, (308), 279 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 308 transitions. [2023-02-17 02:54:06,499 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 308 transitions. Word has length 8 [2023-02-17 02:54:06,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:06,499 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 308 transitions. [2023-02-17 02:54:06,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:06,499 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 308 transitions. [2023-02-17 02:54:06,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 02:54:06,500 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:06,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:06,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 02:54:06,500 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:06,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:06,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2119660206, now seen corresponding path program 1 times [2023-02-17 02:54:06,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:06,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617847369] [2023-02-17 02:54:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:06,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:06,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:06,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617847369] [2023-02-17 02:54:06,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617847369] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:06,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:06,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:54:06,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763002242] [2023-02-17 02:54:06,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:06,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:54:06,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:06,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:54:06,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:54:06,567 INFO L87 Difference]: Start difference. First operand 280 states and 308 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:06,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:06,712 INFO L93 Difference]: Finished difference Result 330 states and 365 transitions. [2023-02-17 02:54:06,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:54:06,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2023-02-17 02:54:06,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:06,714 INFO L225 Difference]: With dead ends: 330 [2023-02-17 02:54:06,714 INFO L226 Difference]: Without dead ends: 330 [2023-02-17 02:54:06,714 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 [2023-02-17 02:54:06,714 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 72 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:06,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 476 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:54:06,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-02-17 02:54:06,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 278. [2023-02-17 02:54:06,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 164 states have (on average 1.8658536585365855) internal successors, (306), 277 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 306 transitions. [2023-02-17 02:54:06,718 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 306 transitions. Word has length 11 [2023-02-17 02:54:06,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:06,719 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 306 transitions. [2023-02-17 02:54:06,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:06,719 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 306 transitions. [2023-02-17 02:54:06,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 02:54:06,720 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:06,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:06,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 02:54:06,720 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:06,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:06,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2119660205, now seen corresponding path program 1 times [2023-02-17 02:54:06,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:06,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343265942] [2023-02-17 02:54:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:06,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:06,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:06,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343265942] [2023-02-17 02:54:06,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343265942] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:06,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:06,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:54:06,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569329209] [2023-02-17 02:54:06,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:06,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:54:06,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:06,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:54:06,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:54:06,780 INFO L87 Difference]: Start difference. First operand 278 states and 306 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:06,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:06,956 INFO L93 Difference]: Finished difference Result 462 states and 510 transitions. [2023-02-17 02:54:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:54:06,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2023-02-17 02:54:06,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:06,958 INFO L225 Difference]: With dead ends: 462 [2023-02-17 02:54:06,958 INFO L226 Difference]: Without dead ends: 462 [2023-02-17 02:54:06,958 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 [2023-02-17 02:54:06,959 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 216 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:06,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 574 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:54:06,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-02-17 02:54:06,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 276. [2023-02-17 02:54:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 164 states have (on average 1.853658536585366) internal successors, (304), 275 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:06,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 304 transitions. [2023-02-17 02:54:06,963 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 304 transitions. Word has length 11 [2023-02-17 02:54:06,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:06,963 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 304 transitions. [2023-02-17 02:54:06,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:06,963 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 304 transitions. [2023-02-17 02:54:06,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 02:54:06,963 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:06,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:06,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 02:54:06,964 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:06,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1231388841, now seen corresponding path program 1 times [2023-02-17 02:54:06,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:06,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352344033] [2023-02-17 02:54:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:06,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:07,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352344033] [2023-02-17 02:54:07,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352344033] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:07,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:07,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 02:54:07,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161623381] [2023-02-17 02:54:07,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:07,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 02:54:07,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:07,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 02:54:07,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:54:07,023 INFO L87 Difference]: Start difference. First operand 276 states and 304 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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) [2023-02-17 02:54:07,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:07,164 INFO L93 Difference]: Finished difference Result 666 states and 735 transitions. [2023-02-17 02:54:07,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 02:54:07,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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 [2023-02-17 02:54:07,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:07,166 INFO L225 Difference]: With dead ends: 666 [2023-02-17 02:54:07,167 INFO L226 Difference]: Without dead ends: 666 [2023-02-17 02:54:07,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:54:07,167 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 585 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:07,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 1363 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:54:07,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2023-02-17 02:54:07,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 279. [2023-02-17 02:54:07,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 167 states have (on average 1.8383233532934131) internal successors, (307), 278 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 307 transitions. [2023-02-17 02:54:07,172 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 307 transitions. Word has length 13 [2023-02-17 02:54:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:07,173 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 307 transitions. [2023-02-17 02:54:07,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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) [2023-02-17 02:54:07,173 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 307 transitions. [2023-02-17 02:54:07,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 02:54:07,174 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:07,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:07,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 02:54:07,174 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:07,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:07,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2035528525, now seen corresponding path program 1 times [2023-02-17 02:54:07,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:07,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981131010] [2023-02-17 02:54:07,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:07,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:07,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:07,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981131010] [2023-02-17 02:54:07,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981131010] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:07,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:07,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:54:07,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071643409] [2023-02-17 02:54:07,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:07,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:54:07,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:07,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:54:07,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:54:07,214 INFO L87 Difference]: Start difference. First operand 279 states and 307 transitions. Second operand has 5 states, 5 states have (on average 3.0) 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) [2023-02-17 02:54:07,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:07,266 INFO L93 Difference]: Finished difference Result 408 states and 447 transitions. [2023-02-17 02:54:07,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 02:54:07,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) 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 [2023-02-17 02:54:07,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:07,268 INFO L225 Difference]: With dead ends: 408 [2023-02-17 02:54:07,268 INFO L226 Difference]: Without dead ends: 408 [2023-02-17 02:54:07,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 02:54:07,268 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 240 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:07,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 1120 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:54:07,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-02-17 02:54:07,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 343. [2023-02-17 02:54:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 231 states have (on average 1.8831168831168832) internal successors, (435), 342 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 435 transitions. [2023-02-17 02:54:07,274 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 435 transitions. Word has length 15 [2023-02-17 02:54:07,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:07,274 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 435 transitions. [2023-02-17 02:54:07,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) 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) [2023-02-17 02:54:07,274 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 435 transitions. [2023-02-17 02:54:07,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 02:54:07,275 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:07,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:07,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 02:54:07,275 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:07,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:07,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1316385230, now seen corresponding path program 1 times [2023-02-17 02:54:07,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:07,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892283343] [2023-02-17 02:54:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:07,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:07,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:07,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892283343] [2023-02-17 02:54:07,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892283343] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:07,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:07,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 02:54:07,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471769226] [2023-02-17 02:54:07,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:07,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:54:07,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:07,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:54:07,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:54:07,294 INFO L87 Difference]: Start difference. First operand 343 states and 435 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) [2023-02-17 02:54:07,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:07,303 INFO L93 Difference]: Finished difference Result 328 states and 410 transitions. [2023-02-17 02:54:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:54:07,303 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 [2023-02-17 02:54:07,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:07,305 INFO L225 Difference]: With dead ends: 328 [2023-02-17 02:54:07,305 INFO L226 Difference]: Without dead ends: 328 [2023-02-17 02:54:07,305 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 [2023-02-17 02:54:07,305 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 223 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:07,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 363 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:54:07,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-02-17 02:54:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2023-02-17 02:54:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 216 states have (on average 1.8981481481481481) internal successors, (410), 327 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 410 transitions. [2023-02-17 02:54:07,310 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 410 transitions. Word has length 16 [2023-02-17 02:54:07,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:07,310 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 410 transitions. [2023-02-17 02:54:07,311 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) [2023-02-17 02:54:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 410 transitions. [2023-02-17 02:54:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 02:54:07,311 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:07,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:07,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 02:54:07,312 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:07,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:07,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1932989585, now seen corresponding path program 1 times [2023-02-17 02:54:07,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:07,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928801904] [2023-02-17 02:54:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:07,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:07,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:07,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928801904] [2023-02-17 02:54:07,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928801904] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:07,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:07,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:54:07,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979173164] [2023-02-17 02:54:07,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:07,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:54:07,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:07,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:54:07,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:54:07,336 INFO L87 Difference]: Start difference. First operand 328 states and 410 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:07,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:07,442 INFO L93 Difference]: Finished difference Result 312 states and 378 transitions. [2023-02-17 02:54:07,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:54:07,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2023-02-17 02:54:07,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:07,444 INFO L225 Difference]: With dead ends: 312 [2023-02-17 02:54:07,444 INFO L226 Difference]: Without dead ends: 312 [2023-02-17 02:54:07,444 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 [2023-02-17 02:54:07,445 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 77 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:07,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 346 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:54:07,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-02-17 02:54:07,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2023-02-17 02:54:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 216 states have (on average 1.75) internal successors, (378), 311 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:07,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 378 transitions. [2023-02-17 02:54:07,449 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 378 transitions. Word has length 17 [2023-02-17 02:54:07,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:07,450 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 378 transitions. [2023-02-17 02:54:07,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:07,450 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 378 transitions. [2023-02-17 02:54:07,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 02:54:07,450 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:07,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:07,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-17 02:54:07,451 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr94REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:07,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:07,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1932989586, now seen corresponding path program 1 times [2023-02-17 02:54:07,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:07,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778429460] [2023-02-17 02:54:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:07,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:07,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:07,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778429460] [2023-02-17 02:54:07,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778429460] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:07,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:07,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:54:07,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853128736] [2023-02-17 02:54:07,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:07,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:54:07,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:07,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:54:07,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:54:07,483 INFO L87 Difference]: Start difference. First operand 312 states and 378 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:07,585 INFO L93 Difference]: Finished difference Result 296 states and 346 transitions. [2023-02-17 02:54:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:54:07,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2023-02-17 02:54:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:07,586 INFO L225 Difference]: With dead ends: 296 [2023-02-17 02:54:07,586 INFO L226 Difference]: Without dead ends: 296 [2023-02-17 02:54:07,587 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 [2023-02-17 02:54:07,587 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 61 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:07,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 355 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:54:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-02-17 02:54:07,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2023-02-17 02:54:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 216 states have (on average 1.6018518518518519) internal successors, (346), 295 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 346 transitions. [2023-02-17 02:54:07,591 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 346 transitions. Word has length 17 [2023-02-17 02:54:07,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:07,591 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 346 transitions. [2023-02-17 02:54:07,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 346 transitions. [2023-02-17 02:54:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 02:54:07,592 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:07,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:07,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-17 02:54:07,592 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr95REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:07,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:07,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2117838446, now seen corresponding path program 1 times [2023-02-17 02:54:07,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:07,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918660031] [2023-02-17 02:54:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:07,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:07,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:07,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918660031] [2023-02-17 02:54:07,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918660031] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:07,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:07,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:54:07,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133190660] [2023-02-17 02:54:07,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:07,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:54:07,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:07,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:54:07,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:54:07,634 INFO L87 Difference]: Start difference. First operand 296 states and 346 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2023-02-17 02:54:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:07,685 INFO L93 Difference]: Finished difference Result 394 states and 436 transitions. [2023-02-17 02:54:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 02:54:07,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 [2023-02-17 02:54:07,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:07,702 INFO L225 Difference]: With dead ends: 394 [2023-02-17 02:54:07,702 INFO L226 Difference]: Without dead ends: 394 [2023-02-17 02:54:07,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:54:07,703 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 278 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:07,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 994 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:54:07,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2023-02-17 02:54:07,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 293. [2023-02-17 02:54:07,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 213 states have (on average 1.596244131455399) internal successors, (340), 292 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 340 transitions. [2023-02-17 02:54:07,709 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 340 transitions. Word has length 19 [2023-02-17 02:54:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:07,710 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 340 transitions. [2023-02-17 02:54:07,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2023-02-17 02:54:07,710 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 340 transitions. [2023-02-17 02:54:07,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 02:54:07,711 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:07,711 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:07,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-17 02:54:07,712 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:07,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1413279430, now seen corresponding path program 1 times [2023-02-17 02:54:07,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:07,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962457597] [2023-02-17 02:54:07,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:07,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:07,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:07,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962457597] [2023-02-17 02:54:07,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962457597] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:07,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:07,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:54:07,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313879783] [2023-02-17 02:54:07,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:07,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 02:54:07,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:07,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 02:54:07,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:54:07,827 INFO L87 Difference]: Start difference. First operand 293 states and 340 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 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) [2023-02-17 02:54:08,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:08,007 INFO L93 Difference]: Finished difference Result 316 states and 364 transitions. [2023-02-17 02:54:08,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:54:08,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 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 [2023-02-17 02:54:08,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:08,008 INFO L225 Difference]: With dead ends: 316 [2023-02-17 02:54:08,008 INFO L226 Difference]: Without dead ends: 316 [2023-02-17 02:54:08,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:54:08,009 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 269 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:08,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 557 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:54:08,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-02-17 02:54:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 295. [2023-02-17 02:54:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 217 states have (on average 1.5898617511520738) internal successors, (345), 294 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 345 transitions. [2023-02-17 02:54:08,012 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 345 transitions. Word has length 19 [2023-02-17 02:54:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:08,012 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 345 transitions. [2023-02-17 02:54:08,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 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) [2023-02-17 02:54:08,013 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 345 transitions. [2023-02-17 02:54:08,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 02:54:08,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:08,013 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:08,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-17 02:54:08,013 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:08,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:08,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1413279429, now seen corresponding path program 1 times [2023-02-17 02:54:08,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:08,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155844750] [2023-02-17 02:54:08,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:08,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:08,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:08,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155844750] [2023-02-17 02:54:08,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155844750] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:08,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:08,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 02:54:08,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555738358] [2023-02-17 02:54:08,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:08,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:54:08,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:08,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:54:08,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:54:08,094 INFO L87 Difference]: Start difference. First operand 295 states and 345 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 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) [2023-02-17 02:54:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:08,332 INFO L93 Difference]: Finished difference Result 409 states and 475 transitions. [2023-02-17 02:54:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:54:08,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 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 [2023-02-17 02:54:08,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:08,334 INFO L225 Difference]: With dead ends: 409 [2023-02-17 02:54:08,334 INFO L226 Difference]: Without dead ends: 409 [2023-02-17 02:54:08,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:54:08,334 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 437 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:08,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 647 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:54:08,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-02-17 02:54:08,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 294. [2023-02-17 02:54:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 217 states have (on average 1.5852534562211982) internal successors, (344), 293 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 344 transitions. [2023-02-17 02:54:08,338 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 344 transitions. Word has length 19 [2023-02-17 02:54:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:08,352 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 344 transitions. [2023-02-17 02:54:08,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 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) [2023-02-17 02:54:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 344 transitions. [2023-02-17 02:54:08,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 02:54:08,355 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:08,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:08,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-17 02:54:08,355 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr103REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:08,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:08,356 INFO L85 PathProgramCache]: Analyzing trace with hash -805519643, now seen corresponding path program 1 times [2023-02-17 02:54:08,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:08,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15276137] [2023-02-17 02:54:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:08,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:08,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:08,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15276137] [2023-02-17 02:54:08,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15276137] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:08,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:08,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 02:54:08,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369913456] [2023-02-17 02:54:08,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:08,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 02:54:08,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:08,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 02:54:08,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 02:54:08,455 INFO L87 Difference]: Start difference. First operand 294 states and 344 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:08,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:08,594 INFO L93 Difference]: Finished difference Result 394 states and 442 transitions. [2023-02-17 02:54:08,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 02:54:08,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2023-02-17 02:54:08,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:08,596 INFO L225 Difference]: With dead ends: 394 [2023-02-17 02:54:08,596 INFO L226 Difference]: Without dead ends: 394 [2023-02-17 02:54:08,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-02-17 02:54:08,596 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 265 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:08,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 1409 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:54:08,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2023-02-17 02:54:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 280. [2023-02-17 02:54:08,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 203 states have (on average 1.5812807881773399) internal successors, (321), 279 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 321 transitions. [2023-02-17 02:54:08,600 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 321 transitions. Word has length 24 [2023-02-17 02:54:08,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:08,600 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 321 transitions. [2023-02-17 02:54:08,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:08,600 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 321 transitions. [2023-02-17 02:54:08,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 02:54:08,601 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:08,601 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] [2023-02-17 02:54:08,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-17 02:54:08,601 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:08,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:08,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1972902682, now seen corresponding path program 1 times [2023-02-17 02:54:08,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:08,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062274401] [2023-02-17 02:54:08,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:08,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:08,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:08,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062274401] [2023-02-17 02:54:08,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062274401] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:08,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:08,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:54:08,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235935136] [2023-02-17 02:54:08,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:08,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:54:08,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:08,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:54:08,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:54:08,636 INFO L87 Difference]: Start difference. First operand 280 states and 321 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:08,669 INFO L93 Difference]: Finished difference Result 298 states and 331 transitions. [2023-02-17 02:54:08,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:54:08,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2023-02-17 02:54:08,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:08,670 INFO L225 Difference]: With dead ends: 298 [2023-02-17 02:54:08,671 INFO L226 Difference]: Without dead ends: 298 [2023-02-17 02:54:08,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:54:08,671 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 667 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:08,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 560 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:54:08,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-02-17 02:54:08,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 280. [2023-02-17 02:54:08,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 203 states have (on average 1.5763546798029557) internal successors, (320), 279 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 320 transitions. [2023-02-17 02:54:08,675 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 320 transitions. Word has length 24 [2023-02-17 02:54:08,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:08,675 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 320 transitions. [2023-02-17 02:54:08,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:08,675 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 320 transitions. [2023-02-17 02:54:08,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 02:54:08,676 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:08,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:08,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-17 02:54:08,676 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr151ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:08,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:08,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1021020451, now seen corresponding path program 1 times [2023-02-17 02:54:08,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:08,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658795337] [2023-02-17 02:54:08,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:08,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:08,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:08,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658795337] [2023-02-17 02:54:08,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658795337] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:08,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:08,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 02:54:08,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572165690] [2023-02-17 02:54:08,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:08,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:54:08,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:08,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:54:08,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:54:08,732 INFO L87 Difference]: Start difference. First operand 280 states and 320 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 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) [2023-02-17 02:54:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:08,915 INFO L93 Difference]: Finished difference Result 288 states and 321 transitions. [2023-02-17 02:54:08,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 02:54:08,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 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 26 [2023-02-17 02:54:08,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:08,916 INFO L225 Difference]: With dead ends: 288 [2023-02-17 02:54:08,916 INFO L226 Difference]: Without dead ends: 284 [2023-02-17 02:54:08,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:54:08,917 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 26 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:08,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 663 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:54:08,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-02-17 02:54:08,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 278. [2023-02-17 02:54:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 201 states have (on average 1.5771144278606966) internal successors, (317), 277 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 317 transitions. [2023-02-17 02:54:08,920 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 317 transitions. Word has length 26 [2023-02-17 02:54:08,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:08,920 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 317 transitions. [2023-02-17 02:54:08,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 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) [2023-02-17 02:54:08,920 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 317 transitions. [2023-02-17 02:54:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 02:54:08,920 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:08,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:08,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-17 02:54:08,921 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr123REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:08,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:08,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1580222949, now seen corresponding path program 1 times [2023-02-17 02:54:08,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:08,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444847727] [2023-02-17 02:54:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:08,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:08,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:08,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444847727] [2023-02-17 02:54:08,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444847727] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:08,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:08,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 02:54:08,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948164671] [2023-02-17 02:54:08,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:08,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:54:08,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:08,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:54:08,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:54:08,941 INFO L87 Difference]: Start difference. First operand 278 states and 317 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:08,949 INFO L93 Difference]: Finished difference Result 263 states and 292 transitions. [2023-02-17 02:54:08,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:54:08,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2023-02-17 02:54:08,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:08,951 INFO L225 Difference]: With dead ends: 263 [2023-02-17 02:54:08,951 INFO L226 Difference]: Without dead ends: 245 [2023-02-17 02:54:08,951 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 [2023-02-17 02:54:08,951 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 31 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:08,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 485 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:54:08,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-02-17 02:54:08,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2023-02-17 02:54:08,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 168 states have (on average 1.630952380952381) internal successors, (274), 244 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:08,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 274 transitions. [2023-02-17 02:54:08,954 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 274 transitions. Word has length 27 [2023-02-17 02:54:08,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:08,955 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 274 transitions. [2023-02-17 02:54:08,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:08,955 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 274 transitions. [2023-02-17 02:54:08,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 02:54:08,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:08,955 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] [2023-02-17 02:54:08,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-17 02:54:08,956 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:08,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:08,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1161321696, now seen corresponding path program 1 times [2023-02-17 02:54:08,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:08,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123182944] [2023-02-17 02:54:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:08,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:09,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:09,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123182944] [2023-02-17 02:54:09,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123182944] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:09,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:09,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-17 02:54:09,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582522565] [2023-02-17 02:54:09,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:09,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 02:54:09,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:09,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 02:54:09,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-02-17 02:54:09,190 INFO L87 Difference]: Start difference. First operand 245 states and 274 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:09,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:09,702 INFO L93 Difference]: Finished difference Result 251 states and 280 transitions. [2023-02-17 02:54:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 02:54:09,703 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2023-02-17 02:54:09,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:09,704 INFO L225 Difference]: With dead ends: 251 [2023-02-17 02:54:09,704 INFO L226 Difference]: Without dead ends: 251 [2023-02-17 02:54:09,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2023-02-17 02:54:09,705 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 288 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:09,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 1314 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 02:54:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-02-17 02:54:09,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 244. [2023-02-17 02:54:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 168 states have (on average 1.625) internal successors, (273), 243 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:09,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 273 transitions. [2023-02-17 02:54:09,707 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 273 transitions. Word has length 27 [2023-02-17 02:54:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:09,708 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 273 transitions. [2023-02-17 02:54:09,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 273 transitions. [2023-02-17 02:54:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 02:54:09,708 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:09,708 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] [2023-02-17 02:54:09,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-17 02:54:09,708 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:09,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:09,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1161321697, now seen corresponding path program 1 times [2023-02-17 02:54:09,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:09,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985534176] [2023-02-17 02:54:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:09,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:10,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:10,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985534176] [2023-02-17 02:54:10,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985534176] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:10,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:10,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-17 02:54:10,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78550403] [2023-02-17 02:54:10,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:10,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 02:54:10,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:10,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 02:54:10,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-02-17 02:54:10,087 INFO L87 Difference]: Start difference. First operand 244 states and 273 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:11,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:11,045 INFO L93 Difference]: Finished difference Result 504 states and 573 transitions. [2023-02-17 02:54:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 02:54:11,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2023-02-17 02:54:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:11,047 INFO L225 Difference]: With dead ends: 504 [2023-02-17 02:54:11,047 INFO L226 Difference]: Without dead ends: 504 [2023-02-17 02:54:11,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2023-02-17 02:54:11,051 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 721 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:11,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 1864 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-17 02:54:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-02-17 02:54:11,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 243. [2023-02-17 02:54:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 168 states have (on average 1.619047619047619) internal successors, (272), 242 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:11,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 272 transitions. [2023-02-17 02:54:11,056 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 272 transitions. Word has length 27 [2023-02-17 02:54:11,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:11,056 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 272 transitions. [2023-02-17 02:54:11,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:11,057 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 272 transitions. [2023-02-17 02:54:11,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 02:54:11,057 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:11,057 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, 1] [2023-02-17 02:54:11,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-17 02:54:11,057 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:11,058 INFO L85 PathProgramCache]: Analyzing trace with hash -672116074, now seen corresponding path program 1 times [2023-02-17 02:54:11,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:11,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77230942] [2023-02-17 02:54:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:11,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:11,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:11,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77230942] [2023-02-17 02:54:11,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77230942] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:11,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:11,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 02:54:11,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394910301] [2023-02-17 02:54:11,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:11,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 02:54:11,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:11,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 02:54:11,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:54:11,144 INFO L87 Difference]: Start difference. First operand 243 states and 272 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:11,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:11,286 INFO L93 Difference]: Finished difference Result 265 states and 296 transitions. [2023-02-17 02:54:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 02:54:11,286 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 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 [2023-02-17 02:54:11,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:11,287 INFO L225 Difference]: With dead ends: 265 [2023-02-17 02:54:11,287 INFO L226 Difference]: Without dead ends: 265 [2023-02-17 02:54:11,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-02-17 02:54:11,288 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 744 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:11,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [744 Valid, 934 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:54:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-02-17 02:54:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 243. [2023-02-17 02:54:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 168 states have (on average 1.6130952380952381) internal successors, (271), 242 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) [2023-02-17 02:54:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 271 transitions. [2023-02-17 02:54:11,291 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 271 transitions. Word has length 29 [2023-02-17 02:54:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:11,291 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 271 transitions. [2023-02-17 02:54:11,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 271 transitions. [2023-02-17 02:54:11,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 02:54:11,291 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:11,291 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, 1, 1, 1] [2023-02-17 02:54:11,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-17 02:54:11,291 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:11,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:11,292 INFO L85 PathProgramCache]: Analyzing trace with hash 102015914, now seen corresponding path program 1 times [2023-02-17 02:54:11,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:11,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390178214] [2023-02-17 02:54:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:11,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 02:54:11,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:11,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390178214] [2023-02-17 02:54:11,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390178214] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:11,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:11,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 02:54:11,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069048389] [2023-02-17 02:54:11,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:11,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:54:11,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:11,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:54:11,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:54:11,376 INFO L87 Difference]: Start difference. First operand 243 states and 271 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:11,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:11,536 INFO L93 Difference]: Finished difference Result 259 states and 290 transitions. [2023-02-17 02:54:11,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:54:11,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 31 [2023-02-17 02:54:11,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:11,537 INFO L225 Difference]: With dead ends: 259 [2023-02-17 02:54:11,537 INFO L226 Difference]: Without dead ends: 259 [2023-02-17 02:54:11,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 02:54:11,538 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 52 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:11,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 673 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:54:11,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-17 02:54:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 242. [2023-02-17 02:54:11,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 168 states have (on average 1.6071428571428572) internal successors, (270), 241 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 270 transitions. [2023-02-17 02:54:11,540 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 270 transitions. Word has length 31 [2023-02-17 02:54:11,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:11,541 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 270 transitions. [2023-02-17 02:54:11,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 270 transitions. [2023-02-17 02:54:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 02:54:11,541 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:11,541 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, 1, 1, 1] [2023-02-17 02:54:11,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-17 02:54:11,541 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:11,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:11,541 INFO L85 PathProgramCache]: Analyzing trace with hash 102015915, now seen corresponding path program 1 times [2023-02-17 02:54:11,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:11,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141720544] [2023-02-17 02:54:11,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:11,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:11,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:11,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141720544] [2023-02-17 02:54:11,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141720544] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:11,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:11,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 02:54:11,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536055154] [2023-02-17 02:54:11,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:11,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 02:54:11,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:11,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 02:54:11,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:54:11,751 INFO L87 Difference]: Start difference. First operand 242 states and 270 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 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) [2023-02-17 02:54:12,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:12,208 INFO L93 Difference]: Finished difference Result 374 states and 421 transitions. [2023-02-17 02:54:12,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 02:54:12,208 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 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 31 [2023-02-17 02:54:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:12,209 INFO L225 Difference]: With dead ends: 374 [2023-02-17 02:54:12,209 INFO L226 Difference]: Without dead ends: 374 [2023-02-17 02:54:12,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-02-17 02:54:12,210 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 564 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:12,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 947 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 02:54:12,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-02-17 02:54:12,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 241. [2023-02-17 02:54:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 168 states have (on average 1.6011904761904763) internal successors, (269), 240 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 269 transitions. [2023-02-17 02:54:12,214 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 269 transitions. Word has length 31 [2023-02-17 02:54:12,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:12,214 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 269 transitions. [2023-02-17 02:54:12,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 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) [2023-02-17 02:54:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 269 transitions. [2023-02-17 02:54:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 02:54:12,214 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:12,214 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, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:12,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-17 02:54:12,215 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:12,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:12,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1705778921, now seen corresponding path program 1 times [2023-02-17 02:54:12,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:12,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440882356] [2023-02-17 02:54:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:12,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:12,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:12,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440882356] [2023-02-17 02:54:12,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440882356] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:12,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:12,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 02:54:12,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261173353] [2023-02-17 02:54:12,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:12,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 02:54:12,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:12,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 02:54:12,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-17 02:54:12,309 INFO L87 Difference]: Start difference. First operand 241 states and 269 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 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) [2023-02-17 02:54:12,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:12,601 INFO L93 Difference]: Finished difference Result 398 states and 443 transitions. [2023-02-17 02:54:12,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 02:54:12,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 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 34 [2023-02-17 02:54:12,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:12,603 INFO L225 Difference]: With dead ends: 398 [2023-02-17 02:54:12,603 INFO L226 Difference]: Without dead ends: 398 [2023-02-17 02:54:12,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-17 02:54:12,603 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 568 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:12,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 614 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 02:54:12,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-02-17 02:54:12,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 244. [2023-02-17 02:54:12,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 173 states have (on average 1.5953757225433527) internal successors, (276), 243 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:12,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 276 transitions. [2023-02-17 02:54:12,607 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 276 transitions. Word has length 34 [2023-02-17 02:54:12,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:12,607 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 276 transitions. [2023-02-17 02:54:12,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 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) [2023-02-17 02:54:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 276 transitions. [2023-02-17 02:54:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 02:54:12,607 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:12,607 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, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:12,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-17 02:54:12,607 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:12,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:12,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1705778920, now seen corresponding path program 1 times [2023-02-17 02:54:12,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:12,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592824458] [2023-02-17 02:54:12,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:12,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:12,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:12,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592824458] [2023-02-17 02:54:12,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592824458] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:12,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:12,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 02:54:12,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292683586] [2023-02-17 02:54:12,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:12,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 02:54:12,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:12,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 02:54:12,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:54:12,742 INFO L87 Difference]: Start difference. First operand 244 states and 276 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 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) [2023-02-17 02:54:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:13,132 INFO L93 Difference]: Finished difference Result 496 states and 560 transitions. [2023-02-17 02:54:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 02:54:13,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 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 34 [2023-02-17 02:54:13,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:13,134 INFO L225 Difference]: With dead ends: 496 [2023-02-17 02:54:13,134 INFO L226 Difference]: Without dead ends: 496 [2023-02-17 02:54:13,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-02-17 02:54:13,135 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 718 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:13,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 715 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 02:54:13,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2023-02-17 02:54:13,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 308. [2023-02-17 02:54:13,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 237 states have (on average 1.5738396624472575) internal successors, (373), 307 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 373 transitions. [2023-02-17 02:54:13,139 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 373 transitions. Word has length 34 [2023-02-17 02:54:13,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:13,140 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 373 transitions. [2023-02-17 02:54:13,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 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) [2023-02-17 02:54:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 373 transitions. [2023-02-17 02:54:13,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-17 02:54:13,140 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:13,140 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:13,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-17 02:54:13,141 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:13,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:13,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1332799064, now seen corresponding path program 1 times [2023-02-17 02:54:13,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:13,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109742097] [2023-02-17 02:54:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:13,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:13,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:13,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109742097] [2023-02-17 02:54:13,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109742097] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:13,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:13,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-17 02:54:13,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450333396] [2023-02-17 02:54:13,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:13,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 02:54:13,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:13,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 02:54:13,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-02-17 02:54:13,577 INFO L87 Difference]: Start difference. First operand 308 states and 373 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:14,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:14,226 INFO L93 Difference]: Finished difference Result 310 states and 374 transitions. [2023-02-17 02:54:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 02:54:14,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2023-02-17 02:54:14,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:14,228 INFO L225 Difference]: With dead ends: 310 [2023-02-17 02:54:14,228 INFO L226 Difference]: Without dead ends: 310 [2023-02-17 02:54:14,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2023-02-17 02:54:14,229 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 307 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:14,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 1865 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 02:54:14,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-02-17 02:54:14,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2023-02-17 02:54:14,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 237 states have (on average 1.5696202531645569) internal successors, (372), 307 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 372 transitions. [2023-02-17 02:54:14,232 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 372 transitions. Word has length 35 [2023-02-17 02:54:14,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:14,233 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 372 transitions. [2023-02-17 02:54:14,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 372 transitions. [2023-02-17 02:54:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-17 02:54:14,233 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:14,233 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:14,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-17 02:54:14,233 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:14,233 INFO L85 PathProgramCache]: Analyzing trace with hash -561839822, now seen corresponding path program 1 times [2023-02-17 02:54:14,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:14,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057773498] [2023-02-17 02:54:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:14,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:14,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:14,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057773498] [2023-02-17 02:54:14,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057773498] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:54:14,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708775111] [2023-02-17 02:54:14,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:14,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:54:14,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:54:14,691 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) [2023-02-17 02:54:14,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 02:54:14,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:14,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-17 02:54:14,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:54:14,913 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 02:54:14,927 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 13 treesize of output 9 [2023-02-17 02:54:14,931 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 13 treesize of output 9 [2023-02-17 02:54:14,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:54:14,951 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 11 treesize of output 15 [2023-02-17 02:54:14,965 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 19 treesize of output 18 [2023-02-17 02:54:14,969 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 23 treesize of output 22 [2023-02-17 02:54:14,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2023-02-17 02:54:14,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:54:14,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 81 [2023-02-17 02:54:15,025 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:54:15,025 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 81 [2023-02-17 02:54:15,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2023-02-17 02:54:15,107 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 02:54:15,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:54:15,108 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 67 [2023-02-17 02:54:15,113 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:54:15,114 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2023-02-17 02:54:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:15,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:54:15,590 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 02:54:15,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:54:15,654 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 27 treesize of output 32 [2023-02-17 02:54:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:15,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708775111] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:54:15,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 02:54:15,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11] total 22 [2023-02-17 02:54:15,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224524268] [2023-02-17 02:54:15,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 02:54:15,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 02:54:15,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:15,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 02:54:15,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-02-17 02:54:15,671 INFO L87 Difference]: Start difference. First operand 308 states and 372 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 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) [2023-02-17 02:54:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:16,793 INFO L93 Difference]: Finished difference Result 367 states and 436 transitions. [2023-02-17 02:54:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 02:54:16,793 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 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) Word has length 35 [2023-02-17 02:54:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:16,795 INFO L225 Difference]: With dead ends: 367 [2023-02-17 02:54:16,795 INFO L226 Difference]: Without dead ends: 367 [2023-02-17 02:54:16,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2023-02-17 02:54:16,795 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 102 mSDsluCounter, 2481 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 2707 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:16,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 2707 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-17 02:54:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-02-17 02:54:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 337. [2023-02-17 02:54:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 266 states have (on average 1.5112781954887218) internal successors, (402), 336 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:16,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 402 transitions. [2023-02-17 02:54:16,799 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 402 transitions. Word has length 35 [2023-02-17 02:54:16,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:16,799 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 402 transitions. [2023-02-17 02:54:16,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 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) [2023-02-17 02:54:16,800 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 402 transitions. [2023-02-17 02:54:16,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 02:54:16,800 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:16,800 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:16,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 02:54:17,000 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,SelfDestructingSolverStorable28 [2023-02-17 02:54:17,001 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2034656951, now seen corresponding path program 1 times [2023-02-17 02:54:17,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:17,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516511286] [2023-02-17 02:54:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:17,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 02:54:17,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:17,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516511286] [2023-02-17 02:54:17,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516511286] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:17,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:17,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:54:17,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542448641] [2023-02-17 02:54:17,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:17,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:54:17,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:17,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:54:17,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:54:17,110 INFO L87 Difference]: Start difference. First operand 337 states and 402 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:17,217 INFO L93 Difference]: Finished difference Result 343 states and 409 transitions. [2023-02-17 02:54:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 02:54:17,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 40 [2023-02-17 02:54:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:17,219 INFO L225 Difference]: With dead ends: 343 [2023-02-17 02:54:17,219 INFO L226 Difference]: Without dead ends: 343 [2023-02-17 02:54:17,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:54:17,220 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 3 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:17,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 845 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:54:17,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-02-17 02:54:17,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2023-02-17 02:54:17,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 270 states have (on average 1.5074074074074073) internal successors, (407), 340 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:17,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 407 transitions. [2023-02-17 02:54:17,223 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 407 transitions. Word has length 40 [2023-02-17 02:54:17,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:17,224 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 407 transitions. [2023-02-17 02:54:17,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:17,224 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 407 transitions. [2023-02-17 02:54:17,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 02:54:17,224 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:17,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:17,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-02-17 02:54:17,224 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr95REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:17,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:17,224 INFO L85 PathProgramCache]: Analyzing trace with hash 854914797, now seen corresponding path program 1 times [2023-02-17 02:54:17,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:17,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2359713] [2023-02-17 02:54:17,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:17,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:17,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:17,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2359713] [2023-02-17 02:54:17,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2359713] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:17,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:17,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 02:54:17,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515458542] [2023-02-17 02:54:17,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:17,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 02:54:17,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:17,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 02:54:17,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:54:17,295 INFO L87 Difference]: Start difference. First operand 341 states and 407 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:17,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:17,415 INFO L93 Difference]: Finished difference Result 461 states and 515 transitions. [2023-02-17 02:54:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 02:54:17,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2023-02-17 02:54:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:17,416 INFO L225 Difference]: With dead ends: 461 [2023-02-17 02:54:17,416 INFO L226 Difference]: Without dead ends: 461 [2023-02-17 02:54:17,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2023-02-17 02:54:17,417 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 1414 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:17,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1414 Valid, 956 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:54:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2023-02-17 02:54:17,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 340. [2023-02-17 02:54:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 269 states have (on average 1.4981412639405205) internal successors, (403), 339 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:17,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 403 transitions. [2023-02-17 02:54:17,422 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 403 transitions. Word has length 43 [2023-02-17 02:54:17,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:17,423 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 403 transitions. [2023-02-17 02:54:17,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 403 transitions. [2023-02-17 02:54:17,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 02:54:17,424 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:17,424 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:17,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-17 02:54:17,424 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr95REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:17,425 INFO L85 PathProgramCache]: Analyzing trace with hash 190981616, now seen corresponding path program 1 times [2023-02-17 02:54:17,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:17,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188528995] [2023-02-17 02:54:17,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:17,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 02:54:17,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:17,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188528995] [2023-02-17 02:54:17,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188528995] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:17,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:17,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 02:54:17,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336466132] [2023-02-17 02:54:17,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:17,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:54:17,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:17,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:54:17,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:54:17,496 INFO L87 Difference]: Start difference. First operand 340 states and 403 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:17,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:17,741 INFO L93 Difference]: Finished difference Result 445 states and 521 transitions. [2023-02-17 02:54:17,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 02:54:17,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 [2023-02-17 02:54:17,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:17,743 INFO L225 Difference]: With dead ends: 445 [2023-02-17 02:54:17,743 INFO L226 Difference]: Without dead ends: 445 [2023-02-17 02:54:17,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:54:17,743 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 244 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:17,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 546 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:54:17,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2023-02-17 02:54:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 344. [2023-02-17 02:54:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 273 states have (on average 1.4945054945054945) internal successors, (408), 343 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 408 transitions. [2023-02-17 02:54:17,755 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 408 transitions. Word has length 45 [2023-02-17 02:54:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:17,755 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 408 transitions. [2023-02-17 02:54:17,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 408 transitions. [2023-02-17 02:54:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 02:54:17,756 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:17,756 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:17,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-17 02:54:17,756 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr96REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:17,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash 190981617, now seen corresponding path program 1 times [2023-02-17 02:54:17,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:17,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978394375] [2023-02-17 02:54:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:17,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:17,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:17,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978394375] [2023-02-17 02:54:17,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978394375] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:54:17,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:54:17,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-02-17 02:54:17,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604048380] [2023-02-17 02:54:17,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:54:17,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 02:54:17,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:54:17,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 02:54:17,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-17 02:54:17,985 INFO L87 Difference]: Start difference. First operand 344 states and 408 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:18,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:54:18,356 INFO L93 Difference]: Finished difference Result 371 states and 438 transitions. [2023-02-17 02:54:18,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 02:54:18,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2023-02-17 02:54:18,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:54:18,358 INFO L225 Difference]: With dead ends: 371 [2023-02-17 02:54:18,358 INFO L226 Difference]: Without dead ends: 367 [2023-02-17 02:54:18,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2023-02-17 02:54:18,359 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 505 mSDsluCounter, 1538 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1757 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 02:54:18,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 1757 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 02:54:18,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-02-17 02:54:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 345. [2023-02-17 02:54:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 274 states have (on average 1.489051094890511) internal successors, (408), 344 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 408 transitions. [2023-02-17 02:54:18,363 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 408 transitions. Word has length 45 [2023-02-17 02:54:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:54:18,363 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 408 transitions. [2023-02-17 02:54:18,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:54:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 408 transitions. [2023-02-17 02:54:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-17 02:54:18,364 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:54:18,364 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:54:18,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-17 02:54:18,364 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 149 more)] === [2023-02-17 02:54:18,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:54:18,365 INFO L85 PathProgramCache]: Analyzing trace with hash 767246721, now seen corresponding path program 2 times [2023-02-17 02:54:18,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:54:18,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403834847] [2023-02-17 02:54:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:54:18,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:54:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:54:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:54:19,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:54:19,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403834847] [2023-02-17 02:54:19,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403834847] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:54:19,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760431237] [2023-02-17 02:54:19,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 02:54:19,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:54:19,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:54:19,166 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) [2023-02-17 02:54:19,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 02:54:19,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 02:54:19,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:54:19,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-17 02:54:19,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:54:19,327 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 02:54:19,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:54:19,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 28 [2023-02-17 02:54:19,389 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:54:19,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 59 [2023-02-17 02:54:19,439 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 11 treesize of output 7 [2023-02-17 02:54:19,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:54:19,477 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 115 treesize of output 82 [2023-02-17 02:54:19,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:54:19,563 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:54:19,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 200 treesize of output 274 [2023-02-17 02:54:19,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 864 treesize of output 364 [2023-02-17 02:54:19,637 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 11 treesize of output 7 [2023-02-17 02:54:19,778 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 21 treesize of output 20 [2023-02-17 02:54:19,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:54:19,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:54:19,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1407 treesize of output 475 [2023-02-17 02:54:21,323 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 02:54:21,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:54:21,324 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 02:54:21,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:54:21,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 3579 treesize of output 1733 [2023-02-17 02:54:22,980 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 21 treesize of output 20 [2023-02-17 02:54:38,366 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 [2023-02-17 02:54:53,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:54:53,683 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 02:54:53,684 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 02:54:53,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:54:53,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 153735 treesize of output 100981 [2023-02-17 02:55:53,284 INFO L217 Elim1Store]: Index analysis took 650 ms [2023-02-17 02:55:53,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:55:53,327 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 02:55:53,341 INFO L173 IndexEqualityManager]: detected equality via solver