./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0217.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5317dae 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-0217.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 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 03:10:30,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 03:10:30,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 03:10:30,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 03:10:30,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 03:10:30,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 03:10:30,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 03:10:30,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 03:10:30,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 03:10:30,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 03:10:30,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 03:10:30,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 03:10:30,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 03:10:30,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 03:10:30,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 03:10:30,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 03:10:30,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 03:10:30,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 03:10:30,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 03:10:30,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 03:10:30,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 03:10:30,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 03:10:30,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 03:10:30,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 03:10:30,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 03:10:30,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 03:10:30,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 03:10:30,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 03:10:30,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 03:10:30,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 03:10:30,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 03:10:30,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 03:10:30,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 03:10:30,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 03:10:30,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 03:10:30,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 03:10:30,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 03:10:30,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 03:10:30,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 03:10:30,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 03:10:30,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 03:10:30,585 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-16 03:10:30,608 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 03:10:30,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 03:10:30,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 03:10:30,613 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 03:10:30,614 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 03:10:30,614 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 03:10:30,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 03:10:30,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 03:10:30,615 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 03:10:30,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 03:10:30,615 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 03:10:30,616 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-16 03:10:30,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 03:10:30,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 03:10:30,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 03:10:30,616 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-16 03:10:30,616 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-16 03:10:30,617 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-16 03:10:30,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 03:10:30,617 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-16 03:10:30,617 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 03:10:30,617 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 03:10:30,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 03:10:30,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 03:10:30,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 03:10:30,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:10:30,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 03:10:30,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 03:10:30,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 03:10:30,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 03:10:30,619 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 03:10:30,619 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 03:10:30,619 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 03:10:30,619 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 03:10:30,619 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec [2023-02-16 03:10:30,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 03:10:30,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 03:10:30,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 03:10:30,827 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 03:10:30,828 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 03:10:30,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0217.i [2023-02-16 03:10:31,803 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 03:10:32,029 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 03:10:32,030 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0217.i [2023-02-16 03:10:32,042 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7bc22db2/7fd9d9efee494d55b4623d8181f27176/FLAG5f27de1ef [2023-02-16 03:10:32,052 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7bc22db2/7fd9d9efee494d55b4623d8181f27176 [2023-02-16 03:10:32,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 03:10:32,055 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 03:10:32,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 03:10:32,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 03:10:32,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 03:10:32,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:10:32" (1/1) ... [2023-02-16 03:10:32,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27dc4feb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:10:32, skipping insertion in model container [2023-02-16 03:10:32,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:10:32" (1/1) ... [2023-02-16 03:10:32,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 03:10:32,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 03:10:32,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:10:32,314 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 03:10:32,344 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:10:32,366 INFO L208 MainTranslator]: Completed translation [2023-02-16 03:10:32,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:10:32 WrapperNode [2023-02-16 03:10:32,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 03:10:32,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 03:10:32,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 03:10:32,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 03:10:32,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:10:32" (1/1) ... [2023-02-16 03:10:32,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:10:32" (1/1) ... [2023-02-16 03:10:32,403 INFO L138 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 210 [2023-02-16 03:10:32,403 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 03:10:32,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 03:10:32,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 03:10:32,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 03:10:32,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:10:32" (1/1) ... [2023-02-16 03:10:32,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:10:32" (1/1) ... [2023-02-16 03:10:32,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:10:32" (1/1) ... [2023-02-16 03:10:32,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:10:32" (1/1) ... [2023-02-16 03:10:32,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:10:32" (1/1) ... [2023-02-16 03:10:32,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:10:32" (1/1) ... [2023-02-16 03:10:32,435 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:10:32" (1/1) ... [2023-02-16 03:10:32,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:10:32" (1/1) ... [2023-02-16 03:10:32,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 03:10:32,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 03:10:32,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 03:10:32,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 03:10:32,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:10:32" (1/1) ... [2023-02-16 03:10:32,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:10:32,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:10:32,489 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) [2023-02-16 03:10:32,509 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 [2023-02-16 03:10:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2023-02-16 03:10:32,531 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2023-02-16 03:10:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 03:10:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 03:10:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 03:10:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-16 03:10:32,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-16 03:10:32,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 03:10:32,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-16 03:10:32,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 03:10:32,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 03:10:32,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 03:10:32,664 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 03:10:32,666 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 03:10:32,983 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 03:10:32,988 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 03:10:32,989 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-16 03:10:32,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:10:32 BoogieIcfgContainer [2023-02-16 03:10:32,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 03:10:32,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 03:10:32,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 03:10:33,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 03:10:33,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 03:10:32" (1/3) ... [2023-02-16 03:10:33,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@768022c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:10:33, skipping insertion in model container [2023-02-16 03:10:33,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:10:32" (2/3) ... [2023-02-16 03:10:33,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@768022c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:10:33, skipping insertion in model container [2023-02-16 03:10:33,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:10:32" (3/3) ... [2023-02-16 03:10:33,003 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217.i [2023-02-16 03:10:33,014 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 03:10:33,015 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2023-02-16 03:10:33,057 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 03:10:33,063 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;@393b27a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 03:10:33,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2023-02-16 03:10:33,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 96 states have (on average 1.9583333333333333) internal successors, (188), 163 states have internal predecessors, (188), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:10:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 03:10:33,072 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:33,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 03:10:33,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:33,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1074518762, now seen corresponding path program 1 times [2023-02-16 03:10:33,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:33,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806270276] [2023-02-16 03:10:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:33,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:33,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:33,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806270276] [2023-02-16 03:10:33,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806270276] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:33,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:33,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:10:33,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273451651] [2023-02-16 03:10:33,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:33,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 03:10:33,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:33,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 03:10:33,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 03:10:33,238 INFO L87 Difference]: Start difference. First operand has 167 states, 96 states have (on average 1.9583333333333333) internal successors, (188), 163 states have internal predecessors, (188), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2023-02-16 03:10:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:33,278 INFO L93 Difference]: Finished difference Result 167 states and 186 transitions. [2023-02-16 03:10:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 03:10:33,281 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2023-02-16 03:10:33,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:33,287 INFO L225 Difference]: With dead ends: 167 [2023-02-16 03:10:33,288 INFO L226 Difference]: Without dead ends: 165 [2023-02-16 03:10:33,289 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 [2023-02-16 03:10:33,292 INFO L413 NwaCegarLoop]: 186 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, 186 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 [2023-02-16 03:10:33,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:10:33,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-16 03:10:33,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-02-16 03:10:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 95 states have (on average 1.894736842105263) internal successors, (180), 161 states have internal predecessors, (180), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:10:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 184 transitions. [2023-02-16 03:10:33,338 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 184 transitions. Word has length 6 [2023-02-16 03:10:33,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:33,339 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 184 transitions. [2023-02-16 03:10:33,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2023-02-16 03:10:33,350 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 184 transitions. [2023-02-16 03:10:33,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-16 03:10:33,350 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:33,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:33,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 03:10:33,351 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:33,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:33,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1280331232, now seen corresponding path program 1 times [2023-02-16 03:10:33,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:33,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309797583] [2023-02-16 03:10:33,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:33,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:33,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:33,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309797583] [2023-02-16 03:10:33,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309797583] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:33,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:33,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-02-16 03:10:33,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530900799] [2023-02-16 03:10:33,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:33,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:10:33,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:10:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:10:33,447 INFO L87 Difference]: Start difference. First operand 165 states and 184 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:10:33,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:33,626 INFO L93 Difference]: Finished difference Result 321 states and 358 transitions. [2023-02-16 03:10:33,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:10:33,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-16 03:10:33,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:33,630 INFO L225 Difference]: With dead ends: 321 [2023-02-16 03:10:33,630 INFO L226 Difference]: Without dead ends: 321 [2023-02-16 03:10:33,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:10:33,634 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 165 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:33,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 237 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:33,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-02-16 03:10:33,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 229. [2023-02-16 03:10:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 156 states have (on average 1.8717948717948718) internal successors, (292), 222 states have internal predecessors, (292), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 03:10:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 300 transitions. [2023-02-16 03:10:33,660 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 300 transitions. Word has length 7 [2023-02-16 03:10:33,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:33,660 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 300 transitions. [2023-02-16 03:10:33,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:10:33,661 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 300 transitions. [2023-02-16 03:10:33,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-16 03:10:33,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:33,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:33,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 03:10:33,662 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:33,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1280331231, now seen corresponding path program 1 times [2023-02-16 03:10:33,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:33,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131955368] [2023-02-16 03:10:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:33,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:33,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:33,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131955368] [2023-02-16 03:10:33,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131955368] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:33,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:33,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:10:33,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509421954] [2023-02-16 03:10:33,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:33,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:10:33,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:33,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:10:33,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:10:33,769 INFO L87 Difference]: Start difference. First operand 229 states and 300 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:10:33,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:33,897 INFO L93 Difference]: Finished difference Result 368 states and 462 transitions. [2023-02-16 03:10:33,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:10:33,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-16 03:10:33,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:33,899 INFO L225 Difference]: With dead ends: 368 [2023-02-16 03:10:33,899 INFO L226 Difference]: Without dead ends: 368 [2023-02-16 03:10:33,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:10:33,900 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 135 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:33,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 401 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:33,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-02-16 03:10:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 302. [2023-02-16 03:10:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 223 states have (on average 1.8340807174887892) internal successors, (409), 291 states have internal predecessors, (409), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-16 03:10:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 425 transitions. [2023-02-16 03:10:33,909 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 425 transitions. Word has length 7 [2023-02-16 03:10:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:33,909 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 425 transitions. [2023-02-16 03:10:33,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:10:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 425 transitions. [2023-02-16 03:10:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-16 03:10:33,909 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:33,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:33,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 03:10:33,910 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:33,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:33,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1280331169, now seen corresponding path program 1 times [2023-02-16 03:10:33,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:33,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415948546] [2023-02-16 03:10:33,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:33,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:33,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:33,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415948546] [2023-02-16 03:10:33,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415948546] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:33,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:33,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:10:33,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29644338] [2023-02-16 03:10:33,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:33,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:10:33,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:33,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:10:33,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:10:33,994 INFO L87 Difference]: Start difference. First operand 302 states and 425 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:10:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:34,129 INFO L93 Difference]: Finished difference Result 367 states and 460 transitions. [2023-02-16 03:10:34,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:10:34,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-16 03:10:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:34,131 INFO L225 Difference]: With dead ends: 367 [2023-02-16 03:10:34,131 INFO L226 Difference]: Without dead ends: 367 [2023-02-16 03:10:34,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:10:34,138 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 117 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:34,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 415 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:34,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-02-16 03:10:34,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 302. [2023-02-16 03:10:34,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 223 states have (on average 1.8340807174887892) internal successors, (409), 291 states have internal predecessors, (409), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-16 03:10:34,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 425 transitions. [2023-02-16 03:10:34,153 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 425 transitions. Word has length 7 [2023-02-16 03:10:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:34,153 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 425 transitions. [2023-02-16 03:10:34,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:10:34,153 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 425 transitions. [2023-02-16 03:10:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 03:10:34,154 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:34,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:34,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 03:10:34,154 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:34,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:34,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1257058894, now seen corresponding path program 1 times [2023-02-16 03:10:34,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:34,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139923633] [2023-02-16 03:10:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:34,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:34,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:34,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139923633] [2023-02-16 03:10:34,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139923633] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:34,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:34,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:10:34,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188608369] [2023-02-16 03:10:34,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:34,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:10:34,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:34,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:10:34,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:10:34,301 INFO L87 Difference]: Start difference. First operand 302 states and 425 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:10:34,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:34,473 INFO L93 Difference]: Finished difference Result 449 states and 603 transitions. [2023-02-16 03:10:34,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:10:34,473 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-16 03:10:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:34,476 INFO L225 Difference]: With dead ends: 449 [2023-02-16 03:10:34,476 INFO L226 Difference]: Without dead ends: 449 [2023-02-16 03:10:34,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-16 03:10:34,477 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 146 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:34,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 766 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:34,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-02-16 03:10:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 344. [2023-02-16 03:10:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 262 states have (on average 1.816793893129771) internal successors, (476), 331 states have internal predecessors, (476), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:10:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 496 transitions. [2023-02-16 03:10:34,487 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 496 transitions. Word has length 10 [2023-02-16 03:10:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:34,487 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 496 transitions. [2023-02-16 03:10:34,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:10:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 496 transitions. [2023-02-16 03:10:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 03:10:34,490 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:34,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:34,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-16 03:10:34,490 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:34,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:34,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1258905936, now seen corresponding path program 1 times [2023-02-16 03:10:34,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:34,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728580950] [2023-02-16 03:10:34,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:34,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:34,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:34,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728580950] [2023-02-16 03:10:34,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728580950] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:34,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:34,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:10:34,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718584637] [2023-02-16 03:10:34,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:34,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:10:34,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:34,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:10:34,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:10:34,588 INFO L87 Difference]: Start difference. First operand 344 states and 496 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:10:34,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:34,708 INFO L93 Difference]: Finished difference Result 439 states and 592 transitions. [2023-02-16 03:10:34,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:10:34,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-16 03:10:34,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:34,710 INFO L225 Difference]: With dead ends: 439 [2023-02-16 03:10:34,710 INFO L226 Difference]: Without dead ends: 439 [2023-02-16 03:10:34,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:10:34,711 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 125 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:34,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 782 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:34,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2023-02-16 03:10:34,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 343. [2023-02-16 03:10:34,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 261 states have (on average 1.8199233716475096) internal successors, (475), 330 states have internal predecessors, (475), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:10:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 495 transitions. [2023-02-16 03:10:34,718 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 495 transitions. Word has length 10 [2023-02-16 03:10:34,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:34,718 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 495 transitions. [2023-02-16 03:10:34,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:10:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 495 transitions. [2023-02-16 03:10:34,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-16 03:10:34,719 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:34,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:34,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-16 03:10:34,720 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:34,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:34,720 INFO L85 PathProgramCache]: Analyzing trace with hash 314118792, now seen corresponding path program 1 times [2023-02-16 03:10:34,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:34,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674476216] [2023-02-16 03:10:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:34,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:34,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:34,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674476216] [2023-02-16 03:10:34,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674476216] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:34,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:34,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:10:34,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563784893] [2023-02-16 03:10:34,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:34,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:10:34,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:34,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:10:34,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:10:34,735 INFO L87 Difference]: Start difference. First operand 343 states and 495 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) [2023-02-16 03:10:34,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:34,801 INFO L93 Difference]: Finished difference Result 394 states and 542 transitions. [2023-02-16 03:10:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:10:34,802 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 [2023-02-16 03:10:34,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:34,803 INFO L225 Difference]: With dead ends: 394 [2023-02-16 03:10:34,803 INFO L226 Difference]: Without dead ends: 387 [2023-02-16 03:10:34,803 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 [2023-02-16 03:10:34,804 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 64 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:34,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 275 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-02-16 03:10:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 340. [2023-02-16 03:10:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 258 states have (on average 1.821705426356589) internal successors, (470), 327 states have internal predecessors, (470), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:10:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 490 transitions. [2023-02-16 03:10:34,810 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 490 transitions. Word has length 11 [2023-02-16 03:10:34,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:34,810 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 490 transitions. [2023-02-16 03:10:34,810 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) [2023-02-16 03:10:34,810 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 490 transitions. [2023-02-16 03:10:34,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-16 03:10:34,811 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:34,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:34,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-16 03:10:34,811 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:34,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:34,812 INFO L85 PathProgramCache]: Analyzing trace with hash -584855357, now seen corresponding path program 1 times [2023-02-16 03:10:34,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:34,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073132279] [2023-02-16 03:10:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:34,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:34,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 03:10:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:34,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:34,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073132279] [2023-02-16 03:10:34,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073132279] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:34,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:34,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:10:34,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457820245] [2023-02-16 03:10:34,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:34,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:10:34,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:34,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:10:34,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:10:34,850 INFO L87 Difference]: Start difference. First operand 340 states and 490 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:35,024 INFO L93 Difference]: Finished difference Result 554 states and 710 transitions. [2023-02-16 03:10:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:10:35,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-16 03:10:35,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:35,029 INFO L225 Difference]: With dead ends: 554 [2023-02-16 03:10:35,029 INFO L226 Difference]: Without dead ends: 554 [2023-02-16 03:10:35,029 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 [2023-02-16 03:10:35,030 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 317 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:35,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 416 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:10:35,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-02-16 03:10:35,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 346. [2023-02-16 03:10:35,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 264 states have (on average 1.803030303030303) internal successors, (476), 333 states have internal predecessors, (476), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:10:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 496 transitions. [2023-02-16 03:10:35,042 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 496 transitions. Word has length 15 [2023-02-16 03:10:35,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:35,042 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 496 transitions. [2023-02-16 03:10:35,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 496 transitions. [2023-02-16 03:10:35,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-16 03:10:35,042 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:35,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:35,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-16 03:10:35,043 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:35,043 INFO L85 PathProgramCache]: Analyzing trace with hash -584855356, now seen corresponding path program 1 times [2023-02-16 03:10:35,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:35,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662167469] [2023-02-16 03:10:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:35,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:35,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 03:10:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:35,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:35,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662167469] [2023-02-16 03:10:35,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662167469] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:35,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:35,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:10:35,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871971325] [2023-02-16 03:10:35,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:35,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:10:35,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:35,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:10:35,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:10:35,156 INFO L87 Difference]: Start difference. First operand 346 states and 496 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:35,275 INFO L93 Difference]: Finished difference Result 400 states and 518 transitions. [2023-02-16 03:10:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:10:35,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-16 03:10:35,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:35,277 INFO L225 Difference]: With dead ends: 400 [2023-02-16 03:10:35,278 INFO L226 Difference]: Without dead ends: 400 [2023-02-16 03:10:35,278 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 [2023-02-16 03:10:35,279 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 185 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:35,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 427 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:35,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-02-16 03:10:35,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 346. [2023-02-16 03:10:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 264 states have (on average 1.768939393939394) internal successors, (467), 333 states have internal predecessors, (467), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:10:35,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 487 transitions. [2023-02-16 03:10:35,287 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 487 transitions. Word has length 15 [2023-02-16 03:10:35,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:35,287 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 487 transitions. [2023-02-16 03:10:35,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:35,287 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 487 transitions. [2023-02-16 03:10:35,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-16 03:10:35,289 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:35,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:35,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-16 03:10:35,289 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:35,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:35,289 INFO L85 PathProgramCache]: Analyzing trace with hash 590215118, now seen corresponding path program 1 times [2023-02-16 03:10:35,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:35,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126069604] [2023-02-16 03:10:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:35,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:35,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:35,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:35,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126069604] [2023-02-16 03:10:35,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126069604] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:35,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:35,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:10:35,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824380887] [2023-02-16 03:10:35,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:35,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:10:35,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:35,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:10:35,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:10:35,367 INFO L87 Difference]: Start difference. First operand 346 states and 487 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:35,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:35,614 INFO L93 Difference]: Finished difference Result 683 states and 818 transitions. [2023-02-16 03:10:35,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:10:35,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-02-16 03:10:35,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:35,616 INFO L225 Difference]: With dead ends: 683 [2023-02-16 03:10:35,616 INFO L226 Difference]: Without dead ends: 683 [2023-02-16 03:10:35,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:10:35,617 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 837 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:35,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 485 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:10:35,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2023-02-16 03:10:35,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 343. [2023-02-16 03:10:35,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 265 states have (on average 1.739622641509434) internal successors, (461), 330 states have internal predecessors, (461), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:10:35,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 481 transitions. [2023-02-16 03:10:35,624 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 481 transitions. Word has length 17 [2023-02-16 03:10:35,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:35,624 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 481 transitions. [2023-02-16 03:10:35,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:35,624 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 481 transitions. [2023-02-16 03:10:35,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-16 03:10:35,627 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:35,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:35,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-16 03:10:35,628 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:35,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:35,628 INFO L85 PathProgramCache]: Analyzing trace with hash 590215119, now seen corresponding path program 1 times [2023-02-16 03:10:35,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:35,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126412416] [2023-02-16 03:10:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:35,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:35,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:35,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:35,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126412416] [2023-02-16 03:10:35,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126412416] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:35,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:35,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 03:10:35,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382556851] [2023-02-16 03:10:35,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:35,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:10:35,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:35,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:10:35,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:10:35,781 INFO L87 Difference]: Start difference. First operand 343 states and 481 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:36,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:36,307 INFO L93 Difference]: Finished difference Result 742 states and 915 transitions. [2023-02-16 03:10:36,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 03:10:36,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-02-16 03:10:36,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:36,311 INFO L225 Difference]: With dead ends: 742 [2023-02-16 03:10:36,311 INFO L226 Difference]: Without dead ends: 742 [2023-02-16 03:10:36,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:10:36,312 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 630 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:36,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 732 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:10:36,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2023-02-16 03:10:36,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 376. [2023-02-16 03:10:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 296 states have (on average 1.7263513513513513) internal successors, (511), 362 states have internal predecessors, (511), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (14), 8 states have call predecessors, (14), 10 states have call successors, (14) [2023-02-16 03:10:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 535 transitions. [2023-02-16 03:10:36,323 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 535 transitions. Word has length 17 [2023-02-16 03:10:36,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:36,323 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 535 transitions. [2023-02-16 03:10:36,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 535 transitions. [2023-02-16 03:10:36,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-16 03:10:36,324 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:36,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:36,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-16 03:10:36,324 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:36,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1217239344, now seen corresponding path program 1 times [2023-02-16 03:10:36,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:36,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874602463] [2023-02-16 03:10:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:36,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:36,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:36,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:36,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874602463] [2023-02-16 03:10:36,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874602463] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:36,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:36,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 03:10:36,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016208133] [2023-02-16 03:10:36,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:36,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:10:36,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:36,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:10:36,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:10:36,395 INFO L87 Difference]: Start difference. First operand 376 states and 535 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:36,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:36,479 INFO L93 Difference]: Finished difference Result 602 states and 831 transitions. [2023-02-16 03:10:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:10:36,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-02-16 03:10:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:36,482 INFO L225 Difference]: With dead ends: 602 [2023-02-16 03:10:36,483 INFO L226 Difference]: Without dead ends: 602 [2023-02-16 03:10:36,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:10:36,483 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 239 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:36,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 1417 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:36,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2023-02-16 03:10:36,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 386. [2023-02-16 03:10:36,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 303 states have (on average 1.7062706270627064) internal successors, (517), 371 states have internal predecessors, (517), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:36,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 547 transitions. [2023-02-16 03:10:36,491 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 547 transitions. Word has length 17 [2023-02-16 03:10:36,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:36,491 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 547 transitions. [2023-02-16 03:10:36,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:36,491 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 547 transitions. [2023-02-16 03:10:36,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-16 03:10:36,492 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:36,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:36,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-16 03:10:36,492 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:36,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:36,493 INFO L85 PathProgramCache]: Analyzing trace with hash 920341577, now seen corresponding path program 1 times [2023-02-16 03:10:36,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:36,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819127078] [2023-02-16 03:10:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:36,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:36,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:36,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:36,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819127078] [2023-02-16 03:10:36,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819127078] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:36,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:36,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:10:36,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40017964] [2023-02-16 03:10:36,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:36,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:10:36,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:36,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:10:36,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:10:36,609 INFO L87 Difference]: Start difference. First operand 386 states and 547 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:37,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:37,128 INFO L93 Difference]: Finished difference Result 769 states and 957 transitions. [2023-02-16 03:10:37,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 03:10:37,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-02-16 03:10:37,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:37,131 INFO L225 Difference]: With dead ends: 769 [2023-02-16 03:10:37,131 INFO L226 Difference]: Without dead ends: 769 [2023-02-16 03:10:37,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-02-16 03:10:37,132 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 531 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:37,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 759 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:10:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2023-02-16 03:10:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 383. [2023-02-16 03:10:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 300 states have (on average 1.7066666666666668) internal successors, (512), 368 states have internal predecessors, (512), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:37,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 542 transitions. [2023-02-16 03:10:37,140 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 542 transitions. Word has length 18 [2023-02-16 03:10:37,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:37,140 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 542 transitions. [2023-02-16 03:10:37,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:37,141 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 542 transitions. [2023-02-16 03:10:37,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-16 03:10:37,141 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:37,141 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] [2023-02-16 03:10:37,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-16 03:10:37,142 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:37,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:37,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1931813849, now seen corresponding path program 1 times [2023-02-16 03:10:37,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:37,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387928019] [2023-02-16 03:10:37,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:37,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:37,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 03:10:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:37,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:37,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387928019] [2023-02-16 03:10:37,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387928019] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:37,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:37,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-16 03:10:37,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858745454] [2023-02-16 03:10:37,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:37,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 03:10:37,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:37,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 03:10:37,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:10:37,419 INFO L87 Difference]: Start difference. First operand 383 states and 542 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:37,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:37,912 INFO L93 Difference]: Finished difference Result 793 states and 1091 transitions. [2023-02-16 03:10:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 03:10:37,914 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-02-16 03:10:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:37,916 INFO L225 Difference]: With dead ends: 793 [2023-02-16 03:10:37,916 INFO L226 Difference]: Without dead ends: 791 [2023-02-16 03:10:37,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-02-16 03:10:37,916 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 544 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:37,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1506 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:10:37,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2023-02-16 03:10:37,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 377. [2023-02-16 03:10:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 294 states have (on average 1.7040816326530612) internal successors, (501), 362 states have internal predecessors, (501), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:37,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 531 transitions. [2023-02-16 03:10:37,923 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 531 transitions. Word has length 21 [2023-02-16 03:10:37,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:37,923 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 531 transitions. [2023-02-16 03:10:37,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:37,923 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 531 transitions. [2023-02-16 03:10:37,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-16 03:10:37,924 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:37,924 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] [2023-02-16 03:10:37,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-16 03:10:37,924 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:37,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:37,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1757289300, now seen corresponding path program 1 times [2023-02-16 03:10:37,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:37,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591645078] [2023-02-16 03:10:37,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:37,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:38,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:38,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:38,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591645078] [2023-02-16 03:10:38,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591645078] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:38,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:38,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 03:10:38,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942709175] [2023-02-16 03:10:38,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:38,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 03:10:38,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:38,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 03:10:38,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:10:38,115 INFO L87 Difference]: Start difference. First operand 377 states and 531 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:38,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:38,381 INFO L93 Difference]: Finished difference Result 536 states and 710 transitions. [2023-02-16 03:10:38,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 03:10:38,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-02-16 03:10:38,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:38,384 INFO L225 Difference]: With dead ends: 536 [2023-02-16 03:10:38,384 INFO L226 Difference]: Without dead ends: 536 [2023-02-16 03:10:38,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-02-16 03:10:38,384 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 226 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:38,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 899 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:10:38,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2023-02-16 03:10:38,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 393. [2023-02-16 03:10:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 310 states have (on average 1.6806451612903226) internal successors, (521), 376 states have internal predecessors, (521), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:38,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 551 transitions. [2023-02-16 03:10:38,392 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 551 transitions. Word has length 21 [2023-02-16 03:10:38,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:38,393 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 551 transitions. [2023-02-16 03:10:38,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:38,393 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 551 transitions. [2023-02-16 03:10:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 03:10:38,393 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:38,393 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] [2023-02-16 03:10:38,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-16 03:10:38,393 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:38,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1569007313, now seen corresponding path program 1 times [2023-02-16 03:10:38,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:38,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610756141] [2023-02-16 03:10:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:38,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:38,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:38,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:38,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610756141] [2023-02-16 03:10:38,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610756141] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:38,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:38,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 03:10:38,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342001391] [2023-02-16 03:10:38,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:38,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:10:38,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:10:38,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:10:38,469 INFO L87 Difference]: Start difference. First operand 393 states and 551 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:38,538 INFO L93 Difference]: Finished difference Result 634 states and 876 transitions. [2023-02-16 03:10:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:10:38,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-02-16 03:10:38,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:38,540 INFO L225 Difference]: With dead ends: 634 [2023-02-16 03:10:38,540 INFO L226 Difference]: Without dead ends: 634 [2023-02-16 03:10:38,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:10:38,541 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 239 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:38,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1104 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:38,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2023-02-16 03:10:38,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 395. [2023-02-16 03:10:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 312 states have (on average 1.6762820512820513) internal successors, (523), 378 states have internal predecessors, (523), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:38,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 553 transitions. [2023-02-16 03:10:38,547 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 553 transitions. Word has length 22 [2023-02-16 03:10:38,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:38,547 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 553 transitions. [2023-02-16 03:10:38,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:38,547 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 553 transitions. [2023-02-16 03:10:38,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 03:10:38,548 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:38,548 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] [2023-02-16 03:10:38,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-16 03:10:38,548 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:38,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:38,548 INFO L85 PathProgramCache]: Analyzing trace with hash 206000049, now seen corresponding path program 1 times [2023-02-16 03:10:38,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:38,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411133484] [2023-02-16 03:10:38,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:38,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:38,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:38,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:38,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411133484] [2023-02-16 03:10:38,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411133484] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:38,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:38,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 03:10:38,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840850737] [2023-02-16 03:10:38,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:38,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:10:38,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:38,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:10:38,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:10:38,615 INFO L87 Difference]: Start difference. First operand 395 states and 553 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:38,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:38,676 INFO L93 Difference]: Finished difference Result 630 states and 868 transitions. [2023-02-16 03:10:38,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:10:38,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-02-16 03:10:38,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:38,678 INFO L225 Difference]: With dead ends: 630 [2023-02-16 03:10:38,678 INFO L226 Difference]: Without dead ends: 630 [2023-02-16 03:10:38,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:10:38,679 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 236 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:38,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 1126 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:10:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2023-02-16 03:10:38,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 393. [2023-02-16 03:10:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 310 states have (on average 1.667741935483871) internal successors, (517), 376 states have internal predecessors, (517), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 547 transitions. [2023-02-16 03:10:38,685 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 547 transitions. Word has length 22 [2023-02-16 03:10:38,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:38,686 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 547 transitions. [2023-02-16 03:10:38,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:38,686 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 547 transitions. [2023-02-16 03:10:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 03:10:38,686 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:38,686 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] [2023-02-16 03:10:38,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-16 03:10:38,687 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:38,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:38,687 INFO L85 PathProgramCache]: Analyzing trace with hash -2074565938, now seen corresponding path program 1 times [2023-02-16 03:10:38,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:38,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728779663] [2023-02-16 03:10:38,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:38,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:38,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:38,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:38,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728779663] [2023-02-16 03:10:38,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728779663] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:38,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:38,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 03:10:38,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963502049] [2023-02-16 03:10:38,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:38,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 03:10:38,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:38,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 03:10:38,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:10:38,845 INFO L87 Difference]: Start difference. First operand 393 states and 547 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:39,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:39,093 INFO L93 Difference]: Finished difference Result 566 states and 761 transitions. [2023-02-16 03:10:39,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 03:10:39,094 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-02-16 03:10:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:39,095 INFO L225 Difference]: With dead ends: 566 [2023-02-16 03:10:39,095 INFO L226 Difference]: Without dead ends: 566 [2023-02-16 03:10:39,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-02-16 03:10:39,096 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 185 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:39,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 1205 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:10:39,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-02-16 03:10:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 403. [2023-02-16 03:10:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 320 states have (on average 1.653125) internal successors, (529), 384 states have internal predecessors, (529), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 559 transitions. [2023-02-16 03:10:39,105 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 559 transitions. Word has length 22 [2023-02-16 03:10:39,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:39,105 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 559 transitions. [2023-02-16 03:10:39,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:39,105 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 559 transitions. [2023-02-16 03:10:39,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-16 03:10:39,106 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:39,106 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] [2023-02-16 03:10:39,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-16 03:10:39,106 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:39,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1039595598, now seen corresponding path program 1 times [2023-02-16 03:10:39,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:39,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711613099] [2023-02-16 03:10:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:39,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:39,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 03:10:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:39,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:39,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711613099] [2023-02-16 03:10:39,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711613099] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:39,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:39,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:10:39,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813676266] [2023-02-16 03:10:39,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:39,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:10:39,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:39,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:10:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:10:39,151 INFO L87 Difference]: Start difference. First operand 403 states and 559 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:39,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:39,311 INFO L93 Difference]: Finished difference Result 638 states and 820 transitions. [2023-02-16 03:10:39,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:10:39,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-02-16 03:10:39,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:39,314 INFO L225 Difference]: With dead ends: 638 [2023-02-16 03:10:39,314 INFO L226 Difference]: Without dead ends: 638 [2023-02-16 03:10:39,314 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 [2023-02-16 03:10:39,314 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 291 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:39,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 424 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:39,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2023-02-16 03:10:39,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 423. [2023-02-16 03:10:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 340 states have (on average 1.673529411764706) internal successors, (569), 404 states have internal predecessors, (569), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:39,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 599 transitions. [2023-02-16 03:10:39,321 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 599 transitions. Word has length 23 [2023-02-16 03:10:39,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:39,321 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 599 transitions. [2023-02-16 03:10:39,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:39,321 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 599 transitions. [2023-02-16 03:10:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-16 03:10:39,321 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:39,322 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] [2023-02-16 03:10:39,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-16 03:10:39,322 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:39,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:39,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1039595597, now seen corresponding path program 1 times [2023-02-16 03:10:39,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:39,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835820010] [2023-02-16 03:10:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:39,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:39,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 03:10:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:39,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:39,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835820010] [2023-02-16 03:10:39,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835820010] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:39,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:39,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:10:39,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219548841] [2023-02-16 03:10:39,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:39,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:10:39,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:39,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:10:39,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:10:39,430 INFO L87 Difference]: Start difference. First operand 423 states and 599 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:39,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:39,610 INFO L93 Difference]: Finished difference Result 475 states and 624 transitions. [2023-02-16 03:10:39,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:10:39,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-02-16 03:10:39,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:39,612 INFO L225 Difference]: With dead ends: 475 [2023-02-16 03:10:39,612 INFO L226 Difference]: Without dead ends: 475 [2023-02-16 03:10:39,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:10:39,613 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 340 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:39,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 509 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-02-16 03:10:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 423. [2023-02-16 03:10:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 340 states have (on average 1.6470588235294117) internal successors, (560), 404 states have internal predecessors, (560), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:39,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 590 transitions. [2023-02-16 03:10:39,618 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 590 transitions. Word has length 23 [2023-02-16 03:10:39,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:39,618 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 590 transitions. [2023-02-16 03:10:39,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:39,618 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 590 transitions. [2023-02-16 03:10:39,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-16 03:10:39,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:39,619 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] [2023-02-16 03:10:39,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-16 03:10:39,619 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:39,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:39,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1218800521, now seen corresponding path program 1 times [2023-02-16 03:10:39,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:39,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780690329] [2023-02-16 03:10:39,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:39,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:39,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:39,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:39,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780690329] [2023-02-16 03:10:39,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780690329] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:39,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:39,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:10:39,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155042524] [2023-02-16 03:10:39,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:39,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:10:39,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:39,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:10:39,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:10:39,651 INFO L87 Difference]: Start difference. First operand 423 states and 590 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:39,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:39,664 INFO L93 Difference]: Finished difference Result 435 states and 602 transitions. [2023-02-16 03:10:39,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:10:39,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-02-16 03:10:39,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:39,666 INFO L225 Difference]: With dead ends: 435 [2023-02-16 03:10:39,666 INFO L226 Difference]: Without dead ends: 435 [2023-02-16 03:10:39,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:10:39,667 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 3 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:39,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 523 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:10:39,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2023-02-16 03:10:39,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 432. [2023-02-16 03:10:39,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 349 states have (on average 1.6303724928366763) internal successors, (569), 413 states have internal predecessors, (569), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:39,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 599 transitions. [2023-02-16 03:10:39,672 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 599 transitions. Word has length 25 [2023-02-16 03:10:39,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:39,673 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 599 transitions. [2023-02-16 03:10:39,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:39,673 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 599 transitions. [2023-02-16 03:10:39,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-16 03:10:39,673 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:39,673 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] [2023-02-16 03:10:39,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-16 03:10:39,673 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:39,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:39,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1220647563, now seen corresponding path program 1 times [2023-02-16 03:10:39,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:39,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588388266] [2023-02-16 03:10:39,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:39,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:39,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:39,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:39,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588388266] [2023-02-16 03:10:39,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588388266] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:39,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:39,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:10:39,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817602945] [2023-02-16 03:10:39,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:39,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:10:39,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:39,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:10:39,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:10:39,759 INFO L87 Difference]: Start difference. First operand 432 states and 599 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:39,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:39,889 INFO L93 Difference]: Finished difference Result 732 states and 965 transitions. [2023-02-16 03:10:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:10:39,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-02-16 03:10:39,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:39,893 INFO L225 Difference]: With dead ends: 732 [2023-02-16 03:10:39,893 INFO L226 Difference]: Without dead ends: 732 [2023-02-16 03:10:39,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:10:39,894 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 317 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:39,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 439 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:39,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2023-02-16 03:10:39,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 491. [2023-02-16 03:10:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 409 states have (on average 1.6039119804400979) internal successors, (656), 472 states have internal predecessors, (656), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 686 transitions. [2023-02-16 03:10:39,901 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 686 transitions. Word has length 25 [2023-02-16 03:10:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:39,901 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 686 transitions. [2023-02-16 03:10:39,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:39,901 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 686 transitions. [2023-02-16 03:10:39,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-16 03:10:39,902 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:39,902 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] [2023-02-16 03:10:39,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-16 03:10:39,902 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:39,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:39,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1220647562, now seen corresponding path program 1 times [2023-02-16 03:10:39,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:39,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044794194] [2023-02-16 03:10:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:39,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:39,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:39,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:39,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044794194] [2023-02-16 03:10:39,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044794194] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:39,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:39,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:10:39,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406569853] [2023-02-16 03:10:39,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:39,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:10:39,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:39,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:10:39,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:10:39,926 INFO L87 Difference]: Start difference. First operand 491 states and 686 transitions. Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:39,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:39,994 INFO L93 Difference]: Finished difference Result 574 states and 771 transitions. [2023-02-16 03:10:39,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:10:39,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-02-16 03:10:39,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:39,996 INFO L225 Difference]: With dead ends: 574 [2023-02-16 03:10:39,996 INFO L226 Difference]: Without dead ends: 574 [2023-02-16 03:10:39,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:10:39,997 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 142 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:39,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 254 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:39,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-02-16 03:10:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 488. [2023-02-16 03:10:40,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 409 states have (on average 1.5745721271393642) internal successors, (644), 469 states have internal predecessors, (644), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:40,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 674 transitions. [2023-02-16 03:10:40,006 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 674 transitions. Word has length 25 [2023-02-16 03:10:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:40,006 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 674 transitions. [2023-02-16 03:10:40,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:40,006 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 674 transitions. [2023-02-16 03:10:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-16 03:10:40,007 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:40,007 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] [2023-02-16 03:10:40,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-16 03:10:40,007 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:40,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:40,008 INFO L85 PathProgramCache]: Analyzing trace with hash 416881146, now seen corresponding path program 1 times [2023-02-16 03:10:40,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:40,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927622220] [2023-02-16 03:10:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:40,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:40,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 03:10:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:40,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:40,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927622220] [2023-02-16 03:10:40,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927622220] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:40,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:40,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 03:10:40,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112794543] [2023-02-16 03:10:40,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:40,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:10:40,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:40,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:10:40,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:10:40,087 INFO L87 Difference]: Start difference. First operand 488 states and 674 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:40,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:40,330 INFO L93 Difference]: Finished difference Result 1147 states and 1574 transitions. [2023-02-16 03:10:40,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 03:10:40,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-02-16 03:10:40,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:40,334 INFO L225 Difference]: With dead ends: 1147 [2023-02-16 03:10:40,334 INFO L226 Difference]: Without dead ends: 1147 [2023-02-16 03:10:40,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:10:40,335 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 488 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:40,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 1560 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:10:40,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2023-02-16 03:10:40,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 583. [2023-02-16 03:10:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 504 states have (on average 1.5873015873015872) internal successors, (800), 559 states have internal predecessors, (800), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 18 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:40,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 830 transitions. [2023-02-16 03:10:40,344 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 830 transitions. Word has length 26 [2023-02-16 03:10:40,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:40,344 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 830 transitions. [2023-02-16 03:10:40,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:40,344 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 830 transitions. [2023-02-16 03:10:40,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-16 03:10:40,345 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:40,345 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] [2023-02-16 03:10:40,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-16 03:10:40,345 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:40,345 INFO L85 PathProgramCache]: Analyzing trace with hash -93653031, now seen corresponding path program 1 times [2023-02-16 03:10:40,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:40,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775844746] [2023-02-16 03:10:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:40,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:40,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 03:10:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:40,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:40,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775844746] [2023-02-16 03:10:40,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775844746] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:40,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:40,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 03:10:40,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940020633] [2023-02-16 03:10:40,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:40,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:10:40,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:40,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:10:40,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:10:40,422 INFO L87 Difference]: Start difference. First operand 583 states and 830 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:40,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:40,658 INFO L93 Difference]: Finished difference Result 1144 states and 1564 transitions. [2023-02-16 03:10:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 03:10:40,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-02-16 03:10:40,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:40,661 INFO L225 Difference]: With dead ends: 1144 [2023-02-16 03:10:40,661 INFO L226 Difference]: Without dead ends: 1144 [2023-02-16 03:10:40,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:10:40,662 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 521 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:40,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1611 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:10:40,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2023-02-16 03:10:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 485. [2023-02-16 03:10:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 409 states have (on average 1.550122249388753) internal successors, (634), 466 states have internal predecessors, (634), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 664 transitions. [2023-02-16 03:10:40,670 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 664 transitions. Word has length 26 [2023-02-16 03:10:40,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:40,670 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 664 transitions. [2023-02-16 03:10:40,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:40,670 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 664 transitions. [2023-02-16 03:10:40,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-16 03:10:40,670 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:40,671 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] [2023-02-16 03:10:40,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-16 03:10:40,671 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:40,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:40,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2088228101, now seen corresponding path program 1 times [2023-02-16 03:10:40,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:40,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405586645] [2023-02-16 03:10:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:40,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:40,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:40,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:40,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405586645] [2023-02-16 03:10:40,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405586645] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:40,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:40,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:10:40,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425590158] [2023-02-16 03:10:40,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:40,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:10:40,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:40,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:10:40,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:10:40,716 INFO L87 Difference]: Start difference. First operand 485 states and 664 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:40,847 INFO L93 Difference]: Finished difference Result 778 states and 1018 transitions. [2023-02-16 03:10:40,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:10:40,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-02-16 03:10:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:40,849 INFO L225 Difference]: With dead ends: 778 [2023-02-16 03:10:40,849 INFO L226 Difference]: Without dead ends: 778 [2023-02-16 03:10:40,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:10:40,850 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 304 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:40,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 497 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2023-02-16 03:10:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 485. [2023-02-16 03:10:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 409 states have (on average 1.550122249388753) internal successors, (634), 466 states have internal predecessors, (634), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 664 transitions. [2023-02-16 03:10:40,857 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 664 transitions. Word has length 26 [2023-02-16 03:10:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:40,857 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 664 transitions. [2023-02-16 03:10:40,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:40,857 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 664 transitions. [2023-02-16 03:10:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-16 03:10:40,858 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:40,858 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] [2023-02-16 03:10:40,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-16 03:10:40,858 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:40,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:40,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1505674617, now seen corresponding path program 1 times [2023-02-16 03:10:40,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:40,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250575322] [2023-02-16 03:10:40,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:40,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:40,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:40,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:40,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250575322] [2023-02-16 03:10:40,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250575322] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:40,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:40,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 03:10:40,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381058376] [2023-02-16 03:10:40,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:40,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:10:40,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:40,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:10:40,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:10:40,940 INFO L87 Difference]: Start difference. First operand 485 states and 664 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:40,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:40,987 INFO L93 Difference]: Finished difference Result 678 states and 907 transitions. [2023-02-16 03:10:40,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:10:40,987 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-02-16 03:10:40,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:40,989 INFO L225 Difference]: With dead ends: 678 [2023-02-16 03:10:40,989 INFO L226 Difference]: Without dead ends: 678 [2023-02-16 03:10:40,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:10:40,990 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 224 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:40,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1352 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:10:40,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2023-02-16 03:10:40,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 424. [2023-02-16 03:10:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 349 states have (on average 1.5472779369627507) internal successors, (540), 405 states have internal predecessors, (540), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 570 transitions. [2023-02-16 03:10:41,001 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 570 transitions. Word has length 26 [2023-02-16 03:10:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:41,001 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 570 transitions. [2023-02-16 03:10:41,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 570 transitions. [2023-02-16 03:10:41,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 03:10:41,002 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:41,003 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] [2023-02-16 03:10:41,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-16 03:10:41,003 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:41,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:41,003 INFO L85 PathProgramCache]: Analyzing trace with hash 38390969, now seen corresponding path program 1 times [2023-02-16 03:10:41,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:41,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407689031] [2023-02-16 03:10:41,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:41,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:41,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 03:10:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:41,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:41,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407689031] [2023-02-16 03:10:41,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407689031] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:41,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:41,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:10:41,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631607692] [2023-02-16 03:10:41,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:41,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:10:41,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:41,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:10:41,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:10:41,099 INFO L87 Difference]: Start difference. First operand 424 states and 570 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:41,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:41,210 INFO L93 Difference]: Finished difference Result 492 states and 630 transitions. [2023-02-16 03:10:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:10:41,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-02-16 03:10:41,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:41,212 INFO L225 Difference]: With dead ends: 492 [2023-02-16 03:10:41,212 INFO L226 Difference]: Without dead ends: 492 [2023-02-16 03:10:41,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:10:41,212 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 153 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:41,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 619 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:41,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-02-16 03:10:41,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 424. [2023-02-16 03:10:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 349 states have (on average 1.5444126074498568) internal successors, (539), 405 states have internal predecessors, (539), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 569 transitions. [2023-02-16 03:10:41,218 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 569 transitions. Word has length 27 [2023-02-16 03:10:41,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:41,219 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 569 transitions. [2023-02-16 03:10:41,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:41,219 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 569 transitions. [2023-02-16 03:10:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 03:10:41,219 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:41,219 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] [2023-02-16 03:10:41,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-16 03:10:41,220 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:41,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:41,220 INFO L85 PathProgramCache]: Analyzing trace with hash 516237483, now seen corresponding path program 1 times [2023-02-16 03:10:41,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:41,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886856854] [2023-02-16 03:10:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:41,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:41,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:41,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:41,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886856854] [2023-02-16 03:10:41,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886856854] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:41,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:41,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-16 03:10:41,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066486360] [2023-02-16 03:10:41,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:41,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:10:41,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:41,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:10:41,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:10:41,290 INFO L87 Difference]: Start difference. First operand 424 states and 569 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:41,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:41,418 INFO L93 Difference]: Finished difference Result 615 states and 812 transitions. [2023-02-16 03:10:41,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 03:10:41,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-02-16 03:10:41,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:41,421 INFO L225 Difference]: With dead ends: 615 [2023-02-16 03:10:41,421 INFO L226 Difference]: Without dead ends: 615 [2023-02-16 03:10:41,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:10:41,422 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 153 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:41,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1000 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:41,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-02-16 03:10:41,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 454. [2023-02-16 03:10:41,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 379 states have (on average 1.5145118733509235) internal successors, (574), 435 states have internal predecessors, (574), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:41,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 604 transitions. [2023-02-16 03:10:41,428 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 604 transitions. Word has length 27 [2023-02-16 03:10:41,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:41,429 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 604 transitions. [2023-02-16 03:10:41,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:41,429 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 604 transitions. [2023-02-16 03:10:41,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 03:10:41,429 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:41,429 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] [2023-02-16 03:10:41,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-16 03:10:41,430 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:41,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:41,430 INFO L85 PathProgramCache]: Analyzing trace with hash 516237677, now seen corresponding path program 1 times [2023-02-16 03:10:41,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:41,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133915857] [2023-02-16 03:10:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:41,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:41,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:41,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:41,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133915857] [2023-02-16 03:10:41,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133915857] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:41,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:41,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:10:41,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733861039] [2023-02-16 03:10:41,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:41,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:10:41,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:41,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:10:41,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:10:41,491 INFO L87 Difference]: Start difference. First operand 454 states and 604 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:41,600 INFO L93 Difference]: Finished difference Result 776 states and 987 transitions. [2023-02-16 03:10:41,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:10:41,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-02-16 03:10:41,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:41,604 INFO L225 Difference]: With dead ends: 776 [2023-02-16 03:10:41,604 INFO L226 Difference]: Without dead ends: 776 [2023-02-16 03:10:41,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:10:41,605 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 443 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:41,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 375 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:41,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2023-02-16 03:10:41,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 544. [2023-02-16 03:10:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 469 states have (on average 1.4968017057569296) internal successors, (702), 525 states have internal predecessors, (702), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 732 transitions. [2023-02-16 03:10:41,612 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 732 transitions. Word has length 27 [2023-02-16 03:10:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:41,612 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 732 transitions. [2023-02-16 03:10:41,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:41,612 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 732 transitions. [2023-02-16 03:10:41,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-16 03:10:41,613 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:41,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:41,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-02-16 03:10:41,613 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:41,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1190828282, now seen corresponding path program 1 times [2023-02-16 03:10:41,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:41,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602579220] [2023-02-16 03:10:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:41,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:41,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 03:10:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:41,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:41,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602579220] [2023-02-16 03:10:41,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602579220] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:41,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:41,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-16 03:10:41,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047937031] [2023-02-16 03:10:41,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:41,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 03:10:41,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:41,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 03:10:41,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:10:41,884 INFO L87 Difference]: Start difference. First operand 544 states and 732 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:42,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:42,304 INFO L93 Difference]: Finished difference Result 648 states and 831 transitions. [2023-02-16 03:10:42,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 03:10:42,304 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-02-16 03:10:42,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:42,305 INFO L225 Difference]: With dead ends: 648 [2023-02-16 03:10:42,306 INFO L226 Difference]: Without dead ends: 648 [2023-02-16 03:10:42,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-02-16 03:10:42,306 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 271 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:42,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 1553 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:10:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2023-02-16 03:10:42,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 427. [2023-02-16 03:10:42,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 360 states have (on average 1.4833333333333334) internal successors, (534), 414 states have internal predecessors, (534), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-16 03:10:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 552 transitions. [2023-02-16 03:10:42,312 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 552 transitions. Word has length 28 [2023-02-16 03:10:42,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:42,312 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 552 transitions. [2023-02-16 03:10:42,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:42,312 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 552 transitions. [2023-02-16 03:10:42,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-16 03:10:42,313 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:42,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:42,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-16 03:10:42,313 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:42,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:42,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1037479271, now seen corresponding path program 1 times [2023-02-16 03:10:42,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:42,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440382149] [2023-02-16 03:10:42,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:42,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:42,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:42,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:42,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440382149] [2023-02-16 03:10:42,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440382149] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:42,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:42,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:10:42,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324859398] [2023-02-16 03:10:42,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:42,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:10:42,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:42,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:10:42,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:10:42,363 INFO L87 Difference]: Start difference. First operand 427 states and 552 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:42,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:42,475 INFO L93 Difference]: Finished difference Result 619 states and 784 transitions. [2023-02-16 03:10:42,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:10:42,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-02-16 03:10:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:42,477 INFO L225 Difference]: With dead ends: 619 [2023-02-16 03:10:42,477 INFO L226 Difference]: Without dead ends: 619 [2023-02-16 03:10:42,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:10:42,477 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 298 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:42,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 378 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:42,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2023-02-16 03:10:42,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 340. [2023-02-16 03:10:42,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 274 states have (on average 1.4817518248175183) internal successors, (406), 327 states have internal predecessors, (406), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-16 03:10:42,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 424 transitions. [2023-02-16 03:10:42,490 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 424 transitions. Word has length 28 [2023-02-16 03:10:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:42,490 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 424 transitions. [2023-02-16 03:10:42,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 424 transitions. [2023-02-16 03:10:42,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-16 03:10:42,491 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:42,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:42,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-16 03:10:42,491 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:42,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:42,492 INFO L85 PathProgramCache]: Analyzing trace with hash -734692199, now seen corresponding path program 1 times [2023-02-16 03:10:42,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:42,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335527287] [2023-02-16 03:10:42,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:42,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:42,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:42,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:42,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335527287] [2023-02-16 03:10:42,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335527287] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:42,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:42,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:10:42,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527569781] [2023-02-16 03:10:42,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:42,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:10:42,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:42,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:10:42,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:10:42,540 INFO L87 Difference]: Start difference. First operand 340 states and 424 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:42,673 INFO L93 Difference]: Finished difference Result 422 states and 516 transitions. [2023-02-16 03:10:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:10:42,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2023-02-16 03:10:42,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:42,674 INFO L225 Difference]: With dead ends: 422 [2023-02-16 03:10:42,674 INFO L226 Difference]: Without dead ends: 422 [2023-02-16 03:10:42,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:10:42,675 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 444 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:42,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 496 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-02-16 03:10:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 339. [2023-02-16 03:10:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 274 states have (on average 1.4744525547445255) internal successors, (404), 326 states have internal predecessors, (404), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-16 03:10:42,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 422 transitions. [2023-02-16 03:10:42,679 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 422 transitions. Word has length 35 [2023-02-16 03:10:42,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:42,680 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 422 transitions. [2023-02-16 03:10:42,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:42,680 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 422 transitions. [2023-02-16 03:10:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-16 03:10:42,680 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:42,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:42,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-16 03:10:42,681 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:42,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash -734692198, now seen corresponding path program 1 times [2023-02-16 03:10:42,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:42,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757491121] [2023-02-16 03:10:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:42,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:42,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:42,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:42,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757491121] [2023-02-16 03:10:42,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757491121] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:42,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:42,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:10:42,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125024417] [2023-02-16 03:10:42,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:42,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:10:42,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:42,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:10:42,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:10:42,773 INFO L87 Difference]: Start difference. First operand 339 states and 422 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:42,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:42,879 INFO L93 Difference]: Finished difference Result 338 states and 420 transitions. [2023-02-16 03:10:42,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:10:42,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2023-02-16 03:10:42,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:42,881 INFO L225 Difference]: With dead ends: 338 [2023-02-16 03:10:42,881 INFO L226 Difference]: Without dead ends: 338 [2023-02-16 03:10:42,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:10:42,881 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 472 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:42,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 314 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:42,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-02-16 03:10:42,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2023-02-16 03:10:42,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 274 states have (on average 1.467153284671533) internal successors, (402), 325 states have internal predecessors, (402), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-16 03:10:42,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 420 transitions. [2023-02-16 03:10:42,885 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 420 transitions. Word has length 35 [2023-02-16 03:10:42,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:42,885 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 420 transitions. [2023-02-16 03:10:42,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:42,885 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 420 transitions. [2023-02-16 03:10:42,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 03:10:42,886 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:42,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:42,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-16 03:10:42,886 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:42,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:42,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1664563334, now seen corresponding path program 1 times [2023-02-16 03:10:42,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:42,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961129527] [2023-02-16 03:10:42,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:42,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:42,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:42,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:42,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961129527] [2023-02-16 03:10:42,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961129527] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:42,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:42,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:10:42,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391814106] [2023-02-16 03:10:42,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:42,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:10:42,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:42,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:10:42,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:10:42,941 INFO L87 Difference]: Start difference. First operand 338 states and 420 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:43,077 INFO L93 Difference]: Finished difference Result 697 states and 845 transitions. [2023-02-16 03:10:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:10:43,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2023-02-16 03:10:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:43,079 INFO L225 Difference]: With dead ends: 697 [2023-02-16 03:10:43,079 INFO L226 Difference]: Without dead ends: 697 [2023-02-16 03:10:43,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:10:43,079 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 464 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:43,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 429 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2023-02-16 03:10:43,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 335. [2023-02-16 03:10:43,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 274 states have (on average 1.4452554744525548) internal successors, (396), 322 states have internal predecessors, (396), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-16 03:10:43,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 414 transitions. [2023-02-16 03:10:43,084 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 414 transitions. Word has length 37 [2023-02-16 03:10:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:43,084 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 414 transitions. [2023-02-16 03:10:43,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:43,085 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 414 transitions. [2023-02-16 03:10:43,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 03:10:43,085 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:43,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:43,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-02-16 03:10:43,085 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:43,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:43,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1664563333, now seen corresponding path program 1 times [2023-02-16 03:10:43,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:43,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137483734] [2023-02-16 03:10:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:43,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:43,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:43,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:43,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137483734] [2023-02-16 03:10:43,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137483734] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:43,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:43,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:10:43,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584724480] [2023-02-16 03:10:43,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:43,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:10:43,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:43,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:10:43,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:10:43,193 INFO L87 Difference]: Start difference. First operand 335 states and 414 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:43,348 INFO L93 Difference]: Finished difference Result 529 states and 653 transitions. [2023-02-16 03:10:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:10:43,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2023-02-16 03:10:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:43,350 INFO L225 Difference]: With dead ends: 529 [2023-02-16 03:10:43,350 INFO L226 Difference]: Without dead ends: 529 [2023-02-16 03:10:43,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:10:43,351 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 705 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:43,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 415 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:43,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2023-02-16 03:10:43,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 334. [2023-02-16 03:10:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 274 states have (on average 1.437956204379562) internal successors, (394), 321 states have internal predecessors, (394), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-16 03:10:43,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 412 transitions. [2023-02-16 03:10:43,355 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 412 transitions. Word has length 37 [2023-02-16 03:10:43,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:43,355 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 412 transitions. [2023-02-16 03:10:43,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:43,355 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 412 transitions. [2023-02-16 03:10:43,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 03:10:43,355 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:43,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:43,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-02-16 03:10:43,356 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:43,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:43,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1664563172, now seen corresponding path program 1 times [2023-02-16 03:10:43,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:43,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577547487] [2023-02-16 03:10:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:43,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:43,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:43,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:43,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577547487] [2023-02-16 03:10:43,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577547487] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:43,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:43,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:10:43,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292478828] [2023-02-16 03:10:43,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:43,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:10:43,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:43,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:10:43,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:10:43,496 INFO L87 Difference]: Start difference. First operand 334 states and 412 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:43,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:43,677 INFO L93 Difference]: Finished difference Result 473 states and 538 transitions. [2023-02-16 03:10:43,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:10:43,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2023-02-16 03:10:43,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:43,678 INFO L225 Difference]: With dead ends: 473 [2023-02-16 03:10:43,678 INFO L226 Difference]: Without dead ends: 473 [2023-02-16 03:10:43,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:10:43,679 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 346 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:43,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 429 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:10:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-02-16 03:10:43,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 334. [2023-02-16 03:10:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 274 states have (on average 1.4306569343065694) internal successors, (392), 321 states have internal predecessors, (392), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-16 03:10:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 410 transitions. [2023-02-16 03:10:43,684 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 410 transitions. Word has length 37 [2023-02-16 03:10:43,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:43,686 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 410 transitions. [2023-02-16 03:10:43,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:43,686 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 410 transitions. [2023-02-16 03:10:43,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-16 03:10:43,686 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:43,686 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:43,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-02-16 03:10:43,687 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:43,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1071259938, now seen corresponding path program 1 times [2023-02-16 03:10:43,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:43,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630820675] [2023-02-16 03:10:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:43,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:43,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:43,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:43,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630820675] [2023-02-16 03:10:43,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630820675] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:43,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:43,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-16 03:10:43,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572840341] [2023-02-16 03:10:43,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:43,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-16 03:10:43,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:43,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-16 03:10:43,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-02-16 03:10:43,916 INFO L87 Difference]: Start difference. First operand 334 states and 410 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:44,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:44,262 INFO L93 Difference]: Finished difference Result 641 states and 790 transitions. [2023-02-16 03:10:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-16 03:10:44,263 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-02-16 03:10:44,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:44,264 INFO L225 Difference]: With dead ends: 641 [2023-02-16 03:10:44,264 INFO L226 Difference]: Without dead ends: 641 [2023-02-16 03:10:44,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2023-02-16 03:10:44,265 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 638 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:44,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 831 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:10:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2023-02-16 03:10:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 335. [2023-02-16 03:10:44,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 276 states have (on average 1.4275362318840579) internal successors, (394), 322 states have internal predecessors, (394), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-16 03:10:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 412 transitions. [2023-02-16 03:10:44,270 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 412 transitions. Word has length 48 [2023-02-16 03:10:44,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:44,271 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 412 transitions. [2023-02-16 03:10:44,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:44,271 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 412 transitions. [2023-02-16 03:10:44,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-16 03:10:44,271 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:44,271 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:44,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-02-16 03:10:44,272 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:44,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:44,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1071260000, now seen corresponding path program 1 times [2023-02-16 03:10:44,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:44,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524986984] [2023-02-16 03:10:44,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:44,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:44,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:44,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:44,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524986984] [2023-02-16 03:10:44,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524986984] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:44,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:44,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:10:44,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695286323] [2023-02-16 03:10:44,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:44,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:10:44,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:44,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:10:44,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:10:44,381 INFO L87 Difference]: Start difference. First operand 335 states and 412 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:44,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:44,492 INFO L93 Difference]: Finished difference Result 350 states and 425 transitions. [2023-02-16 03:10:44,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:10:44,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-02-16 03:10:44,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:44,493 INFO L225 Difference]: With dead ends: 350 [2023-02-16 03:10:44,494 INFO L226 Difference]: Without dead ends: 350 [2023-02-16 03:10:44,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:10:44,494 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 257 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:44,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 309 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:44,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-02-16 03:10:44,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 332. [2023-02-16 03:10:44,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 274 states have (on average 1.4197080291970803) internal successors, (389), 319 states have internal predecessors, (389), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-16 03:10:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 407 transitions. [2023-02-16 03:10:44,498 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 407 transitions. Word has length 48 [2023-02-16 03:10:44,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:44,498 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 407 transitions. [2023-02-16 03:10:44,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 407 transitions. [2023-02-16 03:10:44,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-16 03:10:44,498 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:44,498 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:44,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-02-16 03:10:44,498 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:44,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:44,499 INFO L85 PathProgramCache]: Analyzing trace with hash 122043664, now seen corresponding path program 1 times [2023-02-16 03:10:44,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:44,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10653935] [2023-02-16 03:10:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:44,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:44,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:44,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-16 03:10:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 03:10:44,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:44,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10653935] [2023-02-16 03:10:44,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10653935] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:44,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:44,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:10:44,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984060432] [2023-02-16 03:10:44,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:44,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:10:44,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:44,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:10:44,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:10:44,640 INFO L87 Difference]: Start difference. First operand 332 states and 407 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:10:44,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:44,763 INFO L93 Difference]: Finished difference Result 385 states and 480 transitions. [2023-02-16 03:10:44,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 03:10:44,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2023-02-16 03:10:44,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:44,764 INFO L225 Difference]: With dead ends: 385 [2023-02-16 03:10:44,764 INFO L226 Difference]: Without dead ends: 385 [2023-02-16 03:10:44,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:10:44,764 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 435 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:44,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 306 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:10:44,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-02-16 03:10:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 330. [2023-02-16 03:10:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 274 states have (on average 1.405109489051095) internal successors, (385), 317 states have internal predecessors, (385), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-16 03:10:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 403 transitions. [2023-02-16 03:10:44,768 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 403 transitions. Word has length 50 [2023-02-16 03:10:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:44,768 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 403 transitions. [2023-02-16 03:10:44,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:10:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 403 transitions. [2023-02-16 03:10:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-16 03:10:44,769 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:44,769 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:44,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-02-16 03:10:44,769 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:44,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:44,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1996957779, now seen corresponding path program 1 times [2023-02-16 03:10:44,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:44,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372727736] [2023-02-16 03:10:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:44,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:45,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:45,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:45,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372727736] [2023-02-16 03:10:45,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372727736] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:10:45,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283084120] [2023-02-16 03:10:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:45,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:10:45,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:10:45,205 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) [2023-02-16 03:10:45,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 03:10:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:45,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-16 03:10:45,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:10:45,673 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 [2023-02-16 03:10:45,986 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:10:45,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-02-16 03:10:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:45,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:10:45,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283084120] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:45,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:10:45,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 22 [2023-02-16 03:10:45,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197803507] [2023-02-16 03:10:45,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:45,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 03:10:45,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:45,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 03:10:46,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2023-02-16 03:10:46,000 INFO L87 Difference]: Start difference. First operand 330 states and 403 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:47,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:47,208 INFO L93 Difference]: Finished difference Result 1027 states and 1245 transitions. [2023-02-16 03:10:47,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-16 03:10:47,208 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-02-16 03:10:47,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:47,211 INFO L225 Difference]: With dead ends: 1027 [2023-02-16 03:10:47,211 INFO L226 Difference]: Without dead ends: 1027 [2023-02-16 03:10:47,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=1409, Unknown=0, NotChecked=0, Total=1722 [2023-02-16 03:10:47,212 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 1552 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 63 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:47,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1557 Valid, 1590 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 918 Invalid, 3 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 03:10:47,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2023-02-16 03:10:47,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 480. [2023-02-16 03:10:47,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 417 states have (on average 1.3884892086330936) internal successors, (579), 463 states have internal predecessors, (579), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 609 transitions. [2023-02-16 03:10:47,220 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 609 transitions. Word has length 51 [2023-02-16 03:10:47,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:47,221 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 609 transitions. [2023-02-16 03:10:47,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:47,221 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 609 transitions. [2023-02-16 03:10:47,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-16 03:10:47,221 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:47,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:47,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 03:10:47,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:10:47,433 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:47,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1996957778, now seen corresponding path program 1 times [2023-02-16 03:10:47,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:47,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561497707] [2023-02-16 03:10:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:47,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:48,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:48,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:48,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:48,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561497707] [2023-02-16 03:10:48,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561497707] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:48,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:48,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-16 03:10:48,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696441448] [2023-02-16 03:10:48,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:48,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 03:10:48,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:48,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 03:10:48,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:10:48,380 INFO L87 Difference]: Start difference. First operand 480 states and 609 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:48,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:48,929 INFO L93 Difference]: Finished difference Result 510 states and 640 transitions. [2023-02-16 03:10:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 03:10:48,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-02-16 03:10:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:48,931 INFO L225 Difference]: With dead ends: 510 [2023-02-16 03:10:48,931 INFO L226 Difference]: Without dead ends: 510 [2023-02-16 03:10:48,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-02-16 03:10:48,932 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 114 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:48,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 853 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:10:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-02-16 03:10:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 500. [2023-02-16 03:10:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 437 states have (on average 1.3729977116704806) internal successors, (600), 483 states have internal predecessors, (600), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-16 03:10:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 630 transitions. [2023-02-16 03:10:48,941 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 630 transitions. Word has length 51 [2023-02-16 03:10:48,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:48,941 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 630 transitions. [2023-02-16 03:10:48,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:48,942 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 630 transitions. [2023-02-16 03:10:48,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-16 03:10:48,942 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:48,942 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:48,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-02-16 03:10:48,942 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:48,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:48,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1999969647, now seen corresponding path program 1 times [2023-02-16 03:10:48,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:48,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093450596] [2023-02-16 03:10:48,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:48,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:49,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:49,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:49,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093450596] [2023-02-16 03:10:49,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093450596] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:49,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:49,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-16 03:10:49,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416287670] [2023-02-16 03:10:49,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:49,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 03:10:49,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:49,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 03:10:49,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-02-16 03:10:49,877 INFO L87 Difference]: Start difference. First operand 500 states and 630 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:50,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:50,834 INFO L93 Difference]: Finished difference Result 1101 states and 1356 transitions. [2023-02-16 03:10:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-16 03:10:50,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-02-16 03:10:50,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:50,837 INFO L225 Difference]: With dead ends: 1101 [2023-02-16 03:10:50,837 INFO L226 Difference]: Without dead ends: 1101 [2023-02-16 03:10:50,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2023-02-16 03:10:50,838 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 1446 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:50,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1447 Valid, 1438 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:10:50,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2023-02-16 03:10:50,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 620. [2023-02-16 03:10:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 545 states have (on average 1.3963302752293578) internal successors, (761), 597 states have internal predecessors, (761), 16 states have call successors, (16), 8 states have call predecessors, (16), 16 states have return successors, (32), 14 states have call predecessors, (32), 16 states have call successors, (32) [2023-02-16 03:10:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 809 transitions. [2023-02-16 03:10:50,847 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 809 transitions. Word has length 52 [2023-02-16 03:10:50,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:50,847 INFO L495 AbstractCegarLoop]: Abstraction has 620 states and 809 transitions. [2023-02-16 03:10:50,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:50,847 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 809 transitions. [2023-02-16 03:10:50,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-16 03:10:50,848 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:50,848 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:50,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-02-16 03:10:50,848 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:50,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:50,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1998122606, now seen corresponding path program 1 times [2023-02-16 03:10:50,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:50,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204822188] [2023-02-16 03:10:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:50,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:51,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:51,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:51,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204822188] [2023-02-16 03:10:51,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204822188] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:51,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:51,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-16 03:10:51,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656725604] [2023-02-16 03:10:51,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:51,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 03:10:51,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:51,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 03:10:51,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:10:51,143 INFO L87 Difference]: Start difference. First operand 620 states and 809 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:51,590 INFO L93 Difference]: Finished difference Result 1109 states and 1446 transitions. [2023-02-16 03:10:51,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 03:10:51,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-02-16 03:10:51,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:51,593 INFO L225 Difference]: With dead ends: 1109 [2023-02-16 03:10:51,593 INFO L226 Difference]: Without dead ends: 1109 [2023-02-16 03:10:51,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-02-16 03:10:51,594 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 1100 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:51,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1102 Valid, 1068 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:10:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2023-02-16 03:10:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 782. [2023-02-16 03:10:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 683 states have (on average 1.3865300146412884) internal successors, (947), 747 states have internal predecessors, (947), 28 states have call successors, (28), 14 states have call predecessors, (28), 28 states have return successors, (56), 20 states have call predecessors, (56), 28 states have call successors, (56) [2023-02-16 03:10:51,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1031 transitions. [2023-02-16 03:10:51,613 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1031 transitions. Word has length 52 [2023-02-16 03:10:51,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:51,613 INFO L495 AbstractCegarLoop]: Abstraction has 782 states and 1031 transitions. [2023-02-16 03:10:51,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1031 transitions. [2023-02-16 03:10:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-16 03:10:51,614 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:51,614 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:51,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-02-16 03:10:51,615 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:51,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1998122605, now seen corresponding path program 1 times [2023-02-16 03:10:51,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:51,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751927872] [2023-02-16 03:10:51,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:51,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:52,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:52,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:52,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751927872] [2023-02-16 03:10:52,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751927872] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:10:52,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:10:52,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-16 03:10:52,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117500431] [2023-02-16 03:10:52,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:10:52,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 03:10:52,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:52,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 03:10:52,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:10:52,097 INFO L87 Difference]: Start difference. First operand 782 states and 1031 transitions. Second operand has 11 states, 10 states have (on average 5.0) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:52,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:52,525 INFO L93 Difference]: Finished difference Result 1100 states and 1445 transitions. [2023-02-16 03:10:52,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-16 03:10:52,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-02-16 03:10:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:52,537 INFO L225 Difference]: With dead ends: 1100 [2023-02-16 03:10:52,537 INFO L226 Difference]: Without dead ends: 1100 [2023-02-16 03:10:52,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2023-02-16 03:10:52,538 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 925 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:52,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [925 Valid, 809 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:10:52,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2023-02-16 03:10:52,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 876. [2023-02-16 03:10:52,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 769 states have (on average 1.4187256176853056) internal successors, (1091), 837 states have internal predecessors, (1091), 32 states have call successors, (32), 16 states have call predecessors, (32), 32 states have return successors, (64), 22 states have call predecessors, (64), 32 states have call successors, (64) [2023-02-16 03:10:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1187 transitions. [2023-02-16 03:10:52,549 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1187 transitions. Word has length 52 [2023-02-16 03:10:52,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:52,549 INFO L495 AbstractCegarLoop]: Abstraction has 876 states and 1187 transitions. [2023-02-16 03:10:52,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:10:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1187 transitions. [2023-02-16 03:10:52,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-16 03:10:52,550 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:52,550 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:52,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-02-16 03:10:52,550 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:52,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:52,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1818456665, now seen corresponding path program 1 times [2023-02-16 03:10:52,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:52,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922099336] [2023-02-16 03:10:52,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:52,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:53,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:10:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:53,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:10:53,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922099336] [2023-02-16 03:10:53,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922099336] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:10:53,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562874754] [2023-02-16 03:10:53,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:53,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:10:53,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:10:53,183 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) [2023-02-16 03:10:53,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 03:10:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:53,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-16 03:10:53,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:10:53,428 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-16 03:10:53,429 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 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-16 03:10:53,605 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 14 treesize of output 16 [2023-02-16 03:10:53,613 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 14 treesize of output 16 [2023-02-16 03:10:53,649 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 14 treesize of output 16 [2023-02-16 03:10:53,655 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 14 treesize of output 16 [2023-02-16 03:10:53,710 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 14 treesize of output 16 [2023-02-16 03:10:53,720 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 14 treesize of output 16 [2023-02-16 03:10:53,812 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-02-16 03:10:53,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-02-16 03:10:53,824 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-02-16 03:10:53,825 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 1 case distinctions, treesize of input 19 treesize of output 22 [2023-02-16 03:10:54,126 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:10:54,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:10:54,130 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 43 [2023-02-16 03:10:54,140 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:10:54,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-16 03:10:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:10:54,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:10:54,545 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* ~unnamed1~0~LIST_BEG 4) |c_~#list~0.offset|))) (and (or (forall ((v_ArrVal_493 (Array Int Int))) (= 1 (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_493))) (store .cse0 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse0 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse1)))) (forall ((v_ArrVal_495 Int) (v_ArrVal_492 (Array Int Int))) (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_492))) (store .cse2 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse2 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| v_ArrVal_495))) |c_~#list~0.base|) .cse1) 0))) (forall ((v_ArrVal_493 (Array Int Int))) (let ((.cse3 (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_493))) (store .cse4 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse4 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse1))) (or (= 1 (select |c_#valid| .cse3)) (= .cse3 0)))))) is different from false [2023-02-16 03:10:54,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562874754] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:10:54,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:10:54,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2023-02-16 03:10:54,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623800804] [2023-02-16 03:10:54,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:10:54,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-16 03:10:54,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:10:54,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-16 03:10:54,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=858, Unknown=3, NotChecked=60, Total=1056 [2023-02-16 03:10:54,835 INFO L87 Difference]: Start difference. First operand 876 states and 1187 transitions. Second operand has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 21 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-16 03:10:59,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:10:59,076 INFO L93 Difference]: Finished difference Result 1607 states and 2020 transitions. [2023-02-16 03:10:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-02-16 03:10:59,077 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 21 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2023-02-16 03:10:59,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:10:59,079 INFO L225 Difference]: With dead ends: 1607 [2023-02-16 03:10:59,079 INFO L226 Difference]: Without dead ends: 1607 [2023-02-16 03:10:59,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1047, Invalid=5261, Unknown=16, NotChecked=156, Total=6480 [2023-02-16 03:10:59,081 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 1520 mSDsluCounter, 4488 mSDsCounter, 0 mSdLazyCounter, 3271 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 4804 SdHoareTripleChecker+Invalid, 3357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-16 03:10:59,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1520 Valid, 4804 Invalid, 3357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3271 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-16 03:10:59,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2023-02-16 03:10:59,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1000. [2023-02-16 03:10:59,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 885 states have (on average 1.4180790960451977) internal successors, (1255), 956 states have internal predecessors, (1255), 36 states have call successors, (36), 18 states have call predecessors, (36), 36 states have return successors, (72), 25 states have call predecessors, (72), 36 states have call successors, (72) [2023-02-16 03:10:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1363 transitions. [2023-02-16 03:10:59,094 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1363 transitions. Word has length 52 [2023-02-16 03:10:59,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:10:59,094 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 1363 transitions. [2023-02-16 03:10:59,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 21 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-16 03:10:59,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1363 transitions. [2023-02-16 03:10:59,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-16 03:10:59,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:10:59,095 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:10:59,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-16 03:10:59,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-16 03:10:59,300 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:10:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:10:59,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1816609623, now seen corresponding path program 1 times [2023-02-16 03:10:59,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:10:59,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412525686] [2023-02-16 03:10:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:10:59,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:10:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:10:59,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:11:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:00,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:00,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412525686] [2023-02-16 03:11:00,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412525686] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:11:00,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638359749] [2023-02-16 03:11:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:00,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:11:00,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:11:00,025 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:11:00,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 03:11:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:00,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-16 03:11:00,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:11:00,276 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-16 03:11:00,277 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 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-16 03:11:00,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:11:00,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:11:00,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:11:00,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:11:00,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:11:00,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:11:00,631 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-16 03:11:00,632 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 1 case distinctions, treesize of input 21 treesize of output 26 [2023-02-16 03:11:00,644 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-02-16 03:11:00,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2023-02-16 03:11:00,982 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:11:00,997 INFO L321 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2023-02-16 03:11:00,998 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 45 [2023-02-16 03:11:01,003 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:11:01,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:11:01,007 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 44 [2023-02-16 03:11:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:01,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:11:01,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638359749] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:11:01,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:11:01,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 27 [2023-02-16 03:11:01,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551796010] [2023-02-16 03:11:01,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:11:01,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-16 03:11:01,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:01,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-16 03:11:01,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1160, Unknown=12, NotChecked=0, Total=1332 [2023-02-16 03:11:01,789 INFO L87 Difference]: Start difference. First operand 1000 states and 1363 transitions. Second operand has 28 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 26 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:11:03,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:03,972 INFO L93 Difference]: Finished difference Result 1173 states and 1561 transitions. [2023-02-16 03:11:03,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-16 03:11:03,973 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 26 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2023-02-16 03:11:03,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:03,974 INFO L225 Difference]: With dead ends: 1173 [2023-02-16 03:11:03,974 INFO L226 Difference]: Without dead ends: 1173 [2023-02-16 03:11:03,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=460, Invalid=2389, Unknown=13, NotChecked=0, Total=2862 [2023-02-16 03:11:03,975 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 445 mSDsluCounter, 2930 mSDsCounter, 0 mSdLazyCounter, 2255 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 3148 SdHoareTripleChecker+Invalid, 2297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:03,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 3148 Invalid, 2297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2255 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-16 03:11:03,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2023-02-16 03:11:04,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1050. [2023-02-16 03:11:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 931 states have (on average 1.4092373791621913) internal successors, (1312), 1004 states have internal predecessors, (1312), 38 states have call successors, (38), 19 states have call predecessors, (38), 38 states have return successors, (76), 26 states have call predecessors, (76), 38 states have call successors, (76) [2023-02-16 03:11:04,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1426 transitions. [2023-02-16 03:11:04,002 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1426 transitions. Word has length 52 [2023-02-16 03:11:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:04,002 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 1426 transitions. [2023-02-16 03:11:04,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 26 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:11:04,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1426 transitions. [2023-02-16 03:11:04,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-16 03:11:04,003 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:04,003 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:11:04,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 03:11:04,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:11:04,209 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:11:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:04,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1816609622, now seen corresponding path program 1 times [2023-02-16 03:11:04,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:04,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285479236] [2023-02-16 03:11:04,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:04,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:04,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:11:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:04,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:04,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285479236] [2023-02-16 03:11:04,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285479236] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:11:04,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87401145] [2023-02-16 03:11:04,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:04,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:11:04,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:11:04,794 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:11:04,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 03:11:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:04,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-16 03:11:04,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:11:05,024 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 [2023-02-16 03:11:05,032 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:11:05,033 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 11 [2023-02-16 03:11:05,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:11:05,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:11:05,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:11:05,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:11:05,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:11:05,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:11:05,351 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-16 03:11:05,351 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 1 case distinctions, treesize of input 21 treesize of output 26 [2023-02-16 03:11:05,360 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-02-16 03:11:05,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2023-02-16 03:11:05,678 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:11:05,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:11:05,682 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 45 [2023-02-16 03:11:05,687 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:11:05,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:11:05,713 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 44 [2023-02-16 03:11:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:05,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:11:06,153 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* 4 ~unnamed2~0~ITEM_PREV)) (.cse2 (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4)))) (and (forall ((v_ArrVal_618 (Array Int Int)) (v_ArrVal_619 (Array Int Int))) (let ((.cse3 (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_619))) (store .cse4 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse4 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse2))) (or (<= (+ .cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_618))) (store .cse1 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse1 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2) 4) (select |c_#length| .cse3)) (= .cse3 0)))) (forall ((v_ArrVal_618 (Array Int Int)) (v_ArrVal_619 (Array Int Int))) (let ((.cse5 (select (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_618))) (store .cse7 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse7 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2))) (or (<= (+ .cse0 .cse5 4) (select |c_#length| (select (select (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_619))) (store .cse6 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse6 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse2))) (= .cse5 0)))) (forall ((v_ArrVal_618 (Array Int Int))) (<= 0 (+ .cse0 (select (select (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_618))) (store .cse8 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse8 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2)))))) is different from false [2023-02-16 03:11:06,218 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* 4 ~unnamed2~0~ITEM_PREV)) (.cse2 (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4)))) (and (forall ((v_ArrVal_618 (Array Int Int)) (v_ArrVal_619 (Array Int Int))) (let ((.cse3 (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_619))) (store .cse4 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse4 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse2))) (or (<= (+ .cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_618))) (store .cse1 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse1 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2) 4) (select |c_#length| .cse3)) (= .cse3 0)))) (forall ((v_ArrVal_618 (Array Int Int)) (v_ArrVal_619 (Array Int Int))) (let ((.cse5 (select (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_618))) (store .cse7 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse7 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2))) (or (<= (+ .cse0 .cse5 4) (select |c_#length| (select (select (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_619))) (store .cse6 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse6 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse2))) (= .cse5 0)))) (forall ((v_ArrVal_618 (Array Int Int))) (<= 0 (+ .cse0 (select (select (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_618))) (store .cse8 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse8 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2)))))) is different from false [2023-02-16 03:11:06,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:11:06,416 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 304 treesize of output 309 [2023-02-16 03:11:21,022 WARN L233 SmtUtils]: Spent 14.15s on a formula simplification. DAG size of input: 110 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 03:11:25,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87401145] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:11:25,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:11:25,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 23 [2023-02-16 03:11:25,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704122506] [2023-02-16 03:11:25,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:11:25,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-16 03:11:25,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:25,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-16 03:11:25,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=942, Unknown=4, NotChecked=126, Total=1190 [2023-02-16 03:11:25,959 INFO L87 Difference]: Start difference. First operand 1050 states and 1426 transitions. Second operand has 24 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 22 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:11:30,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:30,865 INFO L93 Difference]: Finished difference Result 2211 states and 2903 transitions. [2023-02-16 03:11:30,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-16 03:11:30,865 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 22 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2023-02-16 03:11:30,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:30,868 INFO L225 Difference]: With dead ends: 2211 [2023-02-16 03:11:30,868 INFO L226 Difference]: Without dead ends: 2211 [2023-02-16 03:11:30,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=605, Invalid=3305, Unknown=4, NotChecked=246, Total=4160 [2023-02-16 03:11:30,869 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 1700 mSDsluCounter, 3945 mSDsCounter, 0 mSdLazyCounter, 3257 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 4226 SdHoareTripleChecker+Invalid, 3315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:30,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1700 Valid, 4226 Invalid, 3315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3257 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-02-16 03:11:30,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2023-02-16 03:11:30,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1124. [2023-02-16 03:11:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1001 states have (on average 1.4075924075924076) internal successors, (1409), 1076 states have internal predecessors, (1409), 40 states have call successors, (40), 20 states have call predecessors, (40), 40 states have return successors, (80), 27 states have call predecessors, (80), 40 states have call successors, (80) [2023-02-16 03:11:30,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1529 transitions. [2023-02-16 03:11:30,885 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1529 transitions. Word has length 52 [2023-02-16 03:11:30,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:30,885 INFO L495 AbstractCegarLoop]: Abstraction has 1124 states and 1529 transitions. [2023-02-16 03:11:30,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 22 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:11:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1529 transitions. [2023-02-16 03:11:30,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-16 03:11:30,886 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:30,886 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:11:30,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 03:11:31,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-16 03:11:31,091 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:11:31,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:31,091 INFO L85 PathProgramCache]: Analyzing trace with hash -939923178, now seen corresponding path program 1 times [2023-02-16 03:11:31,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:31,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636429143] [2023-02-16 03:11:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:31,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:31,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:11:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:31,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:31,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636429143] [2023-02-16 03:11:31,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636429143] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:31,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:31,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-16 03:11:31,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340622150] [2023-02-16 03:11:31,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:31,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 03:11:31,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:31,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 03:11:31,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-02-16 03:11:31,915 INFO L87 Difference]: Start difference. First operand 1124 states and 1529 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:34,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:34,374 INFO L93 Difference]: Finished difference Result 2188 states and 2961 transitions. [2023-02-16 03:11:34,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-16 03:11:34,374 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-02-16 03:11:34,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:34,377 INFO L225 Difference]: With dead ends: 2188 [2023-02-16 03:11:34,377 INFO L226 Difference]: Without dead ends: 2188 [2023-02-16 03:11:34,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=352, Invalid=1130, Unknown=0, NotChecked=0, Total=1482 [2023-02-16 03:11:34,378 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 1852 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1853 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:34,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1853 Valid, 1690 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-16 03:11:34,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2023-02-16 03:11:34,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1123. [2023-02-16 03:11:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1000 states have (on average 1.406) internal successors, (1406), 1075 states have internal predecessors, (1406), 40 states have call successors, (40), 20 states have call predecessors, (40), 40 states have return successors, (80), 27 states have call predecessors, (80), 40 states have call successors, (80) [2023-02-16 03:11:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1526 transitions. [2023-02-16 03:11:34,394 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1526 transitions. Word has length 53 [2023-02-16 03:11:34,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:34,395 INFO L495 AbstractCegarLoop]: Abstraction has 1123 states and 1526 transitions. [2023-02-16 03:11:34,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:34,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1526 transitions. [2023-02-16 03:11:34,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-16 03:11:34,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:34,396 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:11:34,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-02-16 03:11:34,396 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:11:34,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:34,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1869518202, now seen corresponding path program 1 times [2023-02-16 03:11:34,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:34,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130889585] [2023-02-16 03:11:34,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:34,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:34,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:11:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:34,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:34,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130889585] [2023-02-16 03:11:34,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130889585] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:34,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:34,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-16 03:11:34,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753743363] [2023-02-16 03:11:34,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:34,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 03:11:34,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:34,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 03:11:34,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:11:34,844 INFO L87 Difference]: Start difference. First operand 1123 states and 1526 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:35,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:35,477 INFO L93 Difference]: Finished difference Result 2086 states and 2811 transitions. [2023-02-16 03:11:35,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 03:11:35,477 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-02-16 03:11:35,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:35,480 INFO L225 Difference]: With dead ends: 2086 [2023-02-16 03:11:35,480 INFO L226 Difference]: Without dead ends: 2086 [2023-02-16 03:11:35,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2023-02-16 03:11:35,481 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 1581 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:35,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1583 Valid, 1153 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:11:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2023-02-16 03:11:35,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1340. [2023-02-16 03:11:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1193 states have (on average 1.4199497066219615) internal successors, (1694), 1280 states have internal predecessors, (1694), 52 states have call successors, (52), 26 states have call predecessors, (52), 52 states have return successors, (104), 33 states have call predecessors, (104), 52 states have call successors, (104) [2023-02-16 03:11:35,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1850 transitions. [2023-02-16 03:11:35,500 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1850 transitions. Word has length 53 [2023-02-16 03:11:35,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:35,500 INFO L495 AbstractCegarLoop]: Abstraction has 1340 states and 1850 transitions. [2023-02-16 03:11:35,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1850 transitions. [2023-02-16 03:11:35,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-16 03:11:35,501 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:35,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:11:35,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-02-16 03:11:35,501 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:11:35,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:35,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1812259900, now seen corresponding path program 1 times [2023-02-16 03:11:35,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:35,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495252947] [2023-02-16 03:11:35,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:35,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:35,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:11:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:35,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:35,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495252947] [2023-02-16 03:11:35,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495252947] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:35,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:35,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-16 03:11:35,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626676170] [2023-02-16 03:11:35,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:35,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 03:11:35,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:35,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 03:11:35,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:11:35,813 INFO L87 Difference]: Start difference. First operand 1340 states and 1850 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:36,179 INFO L93 Difference]: Finished difference Result 1677 states and 2291 transitions. [2023-02-16 03:11:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-16 03:11:36,179 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-02-16 03:11:36,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:36,181 INFO L225 Difference]: With dead ends: 1677 [2023-02-16 03:11:36,181 INFO L226 Difference]: Without dead ends: 1677 [2023-02-16 03:11:36,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2023-02-16 03:11:36,182 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 917 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:36,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 1026 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:11:36,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2023-02-16 03:11:36,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1434. [2023-02-16 03:11:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1279 states have (on average 1.4370602032838156) internal successors, (1838), 1370 states have internal predecessors, (1838), 56 states have call successors, (56), 28 states have call predecessors, (56), 56 states have return successors, (112), 35 states have call predecessors, (112), 56 states have call successors, (112) [2023-02-16 03:11:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 2006 transitions. [2023-02-16 03:11:36,195 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 2006 transitions. Word has length 53 [2023-02-16 03:11:36,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:36,196 INFO L495 AbstractCegarLoop]: Abstraction has 1434 states and 2006 transitions. [2023-02-16 03:11:36,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:36,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 2006 transitions. [2023-02-16 03:11:36,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-16 03:11:36,196 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:36,197 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:11:36,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-02-16 03:11:36,197 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:11:36,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:36,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1139837490, now seen corresponding path program 1 times [2023-02-16 03:11:36,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:36,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670667449] [2023-02-16 03:11:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:36,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:36,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:11:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:36,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:36,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670667449] [2023-02-16 03:11:36,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670667449] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:11:36,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078880898] [2023-02-16 03:11:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:36,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:11:36,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:11:36,509 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:11:36,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 03:11:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:36,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-16 03:11:36,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:11:36,665 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 [2023-02-16 03:11:36,961 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 15 treesize of output 11 [2023-02-16 03:11:37,043 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 21 treesize of output 9 [2023-02-16 03:11:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:37,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:11:37,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078880898] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:37,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:11:37,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2023-02-16 03:11:37,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473002779] [2023-02-16 03:11:37,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:37,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 03:11:37,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:37,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 03:11:37,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-02-16 03:11:37,050 INFO L87 Difference]: Start difference. First operand 1434 states and 2006 transitions. Second operand has 11 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:37,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:37,854 INFO L93 Difference]: Finished difference Result 1890 states and 2637 transitions. [2023-02-16 03:11:37,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 03:11:37,854 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-02-16 03:11:37,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:37,857 INFO L225 Difference]: With dead ends: 1890 [2023-02-16 03:11:37,857 INFO L226 Difference]: Without dead ends: 1890 [2023-02-16 03:11:37,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2023-02-16 03:11:37,858 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 609 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:37,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1187 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 03:11:37,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2023-02-16 03:11:37,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1370. [2023-02-16 03:11:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1223 states have (on average 1.4431725265739983) internal successors, (1765), 1310 states have internal predecessors, (1765), 52 states have call successors, (52), 26 states have call predecessors, (52), 52 states have return successors, (104), 33 states have call predecessors, (104), 52 states have call successors, (104) [2023-02-16 03:11:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1921 transitions. [2023-02-16 03:11:37,873 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1921 transitions. Word has length 53 [2023-02-16 03:11:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:37,874 INFO L495 AbstractCegarLoop]: Abstraction has 1370 states and 1921 transitions. [2023-02-16 03:11:37,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:37,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1921 transitions. [2023-02-16 03:11:37,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-16 03:11:37,874 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:37,874 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:11:37,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 03:11:38,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:11:38,080 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:11:38,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:38,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1137990448, now seen corresponding path program 1 times [2023-02-16 03:11:38,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:38,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150029929] [2023-02-16 03:11:38,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:38,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:38,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:11:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:38,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:38,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150029929] [2023-02-16 03:11:38,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150029929] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:11:38,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060256961] [2023-02-16 03:11:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:38,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:11:38,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:11:38,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:11:38,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 03:11:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-16 03:11:38,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:11:38,841 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 [2023-02-16 03:11:39,169 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 15 treesize of output 11 [2023-02-16 03:11:39,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:11:39,246 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 29 treesize of output 28 [2023-02-16 03:11:39,475 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:11:39,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2023-02-16 03:11:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:39,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:11:39,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060256961] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:39,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:11:39,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 23 [2023-02-16 03:11:39,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516815251] [2023-02-16 03:11:39,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:39,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 03:11:39,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:39,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 03:11:39,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-02-16 03:11:39,485 INFO L87 Difference]: Start difference. First operand 1370 states and 1921 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:41,395 INFO L93 Difference]: Finished difference Result 2064 states and 2784 transitions. [2023-02-16 03:11:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 03:11:41,395 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-02-16 03:11:41,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:41,398 INFO L225 Difference]: With dead ends: 2064 [2023-02-16 03:11:41,398 INFO L226 Difference]: Without dead ends: 2064 [2023-02-16 03:11:41,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2023-02-16 03:11:41,399 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 748 mSDsluCounter, 1844 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 2184 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:41,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 2184 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-16 03:11:41,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2023-02-16 03:11:41,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1370. [2023-02-16 03:11:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1223 states have (on average 1.4431725265739983) internal successors, (1765), 1310 states have internal predecessors, (1765), 52 states have call successors, (52), 26 states have call predecessors, (52), 52 states have return successors, (104), 33 states have call predecessors, (104), 52 states have call successors, (104) [2023-02-16 03:11:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1921 transitions. [2023-02-16 03:11:41,414 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1921 transitions. Word has length 53 [2023-02-16 03:11:41,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:41,414 INFO L495 AbstractCegarLoop]: Abstraction has 1370 states and 1921 transitions. [2023-02-16 03:11:41,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:41,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1921 transitions. [2023-02-16 03:11:41,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-16 03:11:41,415 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:41,415 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:11:41,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-16 03:11:41,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:11:41,620 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:11:41,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:41,620 INFO L85 PathProgramCache]: Analyzing trace with hash -761402410, now seen corresponding path program 1 times [2023-02-16 03:11:41,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:41,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582848332] [2023-02-16 03:11:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:41,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:42,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:11:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:42,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:42,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:42,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582848332] [2023-02-16 03:11:42,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582848332] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:42,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:42,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-16 03:11:42,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900438804] [2023-02-16 03:11:42,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:42,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 03:11:42,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:42,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 03:11:42,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:11:42,021 INFO L87 Difference]: Start difference. First operand 1370 states and 1921 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:42,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:42,624 INFO L93 Difference]: Finished difference Result 1652 states and 2222 transitions. [2023-02-16 03:11:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 03:11:42,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-02-16 03:11:42,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:42,627 INFO L225 Difference]: With dead ends: 1652 [2023-02-16 03:11:42,627 INFO L226 Difference]: Without dead ends: 1652 [2023-02-16 03:11:42,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-02-16 03:11:42,627 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 730 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:42,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1536 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:11:42,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2023-02-16 03:11:42,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1370. [2023-02-16 03:11:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1223 states have (on average 1.438266557645135) internal successors, (1759), 1310 states have internal predecessors, (1759), 52 states have call successors, (52), 26 states have call predecessors, (52), 52 states have return successors, (104), 33 states have call predecessors, (104), 52 states have call successors, (104) [2023-02-16 03:11:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1915 transitions. [2023-02-16 03:11:42,640 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1915 transitions. Word has length 53 [2023-02-16 03:11:42,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:42,640 INFO L495 AbstractCegarLoop]: Abstraction has 1370 states and 1915 transitions. [2023-02-16 03:11:42,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1915 transitions. [2023-02-16 03:11:42,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-16 03:11:42,641 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:42,641 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:11:42,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-02-16 03:11:42,641 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:11:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:42,641 INFO L85 PathProgramCache]: Analyzing trace with hash -537583025, now seen corresponding path program 1 times [2023-02-16 03:11:42,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:42,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585780477] [2023-02-16 03:11:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:42,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:43,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:11:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:43,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:43,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585780477] [2023-02-16 03:11:43,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585780477] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:43,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:43,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-16 03:11:43,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154916597] [2023-02-16 03:11:43,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:43,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 03:11:43,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:43,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 03:11:43,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-02-16 03:11:43,723 INFO L87 Difference]: Start difference. First operand 1370 states and 1915 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:46,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:46,152 INFO L93 Difference]: Finished difference Result 2013 states and 2732 transitions. [2023-02-16 03:11:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 03:11:46,153 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-02-16 03:11:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:46,156 INFO L225 Difference]: With dead ends: 2013 [2023-02-16 03:11:46,157 INFO L226 Difference]: Without dead ends: 2013 [2023-02-16 03:11:46,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2023-02-16 03:11:46,157 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 1255 mSDsluCounter, 2579 mSDsCounter, 0 mSdLazyCounter, 1692 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1257 SdHoareTripleChecker+Valid, 2841 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:46,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1257 Valid, 2841 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1692 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-16 03:11:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2023-02-16 03:11:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1205. [2023-02-16 03:11:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1070 states have (on average 1.449532710280374) internal successors, (1551), 1152 states have internal predecessors, (1551), 46 states have call successors, (46), 23 states have call predecessors, (46), 46 states have return successors, (92), 29 states have call predecessors, (92), 46 states have call successors, (92) [2023-02-16 03:11:46,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1689 transitions. [2023-02-16 03:11:46,175 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1689 transitions. Word has length 53 [2023-02-16 03:11:46,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:46,175 INFO L495 AbstractCegarLoop]: Abstraction has 1205 states and 1689 transitions. [2023-02-16 03:11:46,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:46,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1689 transitions. [2023-02-16 03:11:46,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-16 03:11:46,176 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:46,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:11:46,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-02-16 03:11:46,177 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:11:46,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:46,177 INFO L85 PathProgramCache]: Analyzing trace with hash 927151265, now seen corresponding path program 1 times [2023-02-16 03:11:46,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:46,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277925888] [2023-02-16 03:11:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:46,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:46,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:11:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:46,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:46,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277925888] [2023-02-16 03:11:46,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277925888] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:46,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:46,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-02-16 03:11:46,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272361956] [2023-02-16 03:11:46,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:46,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 03:11:46,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:46,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 03:11:46,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-02-16 03:11:46,864 INFO L87 Difference]: Start difference. First operand 1205 states and 1689 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:48,910 INFO L93 Difference]: Finished difference Result 2079 states and 2836 transitions. [2023-02-16 03:11:48,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-16 03:11:48,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-02-16 03:11:48,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:48,918 INFO L225 Difference]: With dead ends: 2079 [2023-02-16 03:11:48,918 INFO L226 Difference]: Without dead ends: 2079 [2023-02-16 03:11:48,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=352, Invalid=1130, Unknown=0, NotChecked=0, Total=1482 [2023-02-16 03:11:48,919 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 2153 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2154 SdHoareTripleChecker+Valid, 2128 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:48,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2154 Valid, 2128 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 03:11:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2023-02-16 03:11:48,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 995. [2023-02-16 03:11:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 884 states have (on average 1.4389140271493213) internal successors, (1272), 954 states have internal predecessors, (1272), 34 states have call successors, (34), 17 states have call predecessors, (34), 34 states have return successors, (68), 23 states have call predecessors, (68), 34 states have call successors, (68) [2023-02-16 03:11:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1374 transitions. [2023-02-16 03:11:48,935 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1374 transitions. Word has length 54 [2023-02-16 03:11:48,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:48,935 INFO L495 AbstractCegarLoop]: Abstraction has 995 states and 1374 transitions. [2023-02-16 03:11:48,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1374 transitions. [2023-02-16 03:11:48,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-16 03:11:48,936 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:48,936 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:11:48,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-02-16 03:11:48,937 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:11:48,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:48,937 INFO L85 PathProgramCache]: Analyzing trace with hash -917966778, now seen corresponding path program 1 times [2023-02-16 03:11:48,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:48,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915030358] [2023-02-16 03:11:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:48,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:49,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:11:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:49,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:49,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915030358] [2023-02-16 03:11:49,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915030358] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:49,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:49,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-16 03:11:49,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308065335] [2023-02-16 03:11:49,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:49,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 03:11:49,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:49,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 03:11:49,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:11:49,301 INFO L87 Difference]: Start difference. First operand 995 states and 1374 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:49,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:49,729 INFO L93 Difference]: Finished difference Result 1263 states and 1704 transitions. [2023-02-16 03:11:49,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 03:11:49,729 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-02-16 03:11:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:49,730 INFO L225 Difference]: With dead ends: 1263 [2023-02-16 03:11:49,731 INFO L226 Difference]: Without dead ends: 1263 [2023-02-16 03:11:49,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2023-02-16 03:11:49,731 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 378 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:49,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1219 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:11:49,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2023-02-16 03:11:49,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 884. [2023-02-16 03:11:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 785 states have (on average 1.4267515923566878) internal successors, (1120), 849 states have internal predecessors, (1120), 28 states have call successors, (28), 14 states have call predecessors, (28), 28 states have return successors, (56), 20 states have call predecessors, (56), 28 states have call successors, (56) [2023-02-16 03:11:49,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1204 transitions. [2023-02-16 03:11:49,740 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1204 transitions. Word has length 54 [2023-02-16 03:11:49,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:49,741 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1204 transitions. [2023-02-16 03:11:49,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:49,741 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1204 transitions. [2023-02-16 03:11:49,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-16 03:11:49,741 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:49,741 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:11:49,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2023-02-16 03:11:49,742 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:11:49,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:49,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1309205142, now seen corresponding path program 1 times [2023-02-16 03:11:49,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:49,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419492034] [2023-02-16 03:11:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:49,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:50,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:11:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:50,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:50,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419492034] [2023-02-16 03:11:50,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419492034] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:50,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:50,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-02-16 03:11:50,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017914607] [2023-02-16 03:11:50,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:50,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 03:11:50,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:50,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 03:11:50,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:11:50,575 INFO L87 Difference]: Start difference. First operand 884 states and 1204 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:53,546 INFO L93 Difference]: Finished difference Result 1839 states and 2452 transitions. [2023-02-16 03:11:53,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-16 03:11:53,553 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-02-16 03:11:53,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:53,556 INFO L225 Difference]: With dead ends: 1839 [2023-02-16 03:11:53,556 INFO L226 Difference]: Without dead ends: 1839 [2023-02-16 03:11:53,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2023-02-16 03:11:53,556 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 1969 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1973 SdHoareTripleChecker+Valid, 2047 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:53,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1973 Valid, 2047 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-16 03:11:53,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2023-02-16 03:11:53,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1085. [2023-02-16 03:11:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 971 states have (on average 1.4407826982492276) internal successors, (1399), 1041 states have internal predecessors, (1399), 37 states have call successors, (37), 17 states have call predecessors, (37), 34 states have return successors, (74), 26 states have call predecessors, (74), 37 states have call successors, (74) [2023-02-16 03:11:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 1510 transitions. [2023-02-16 03:11:53,570 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 1510 transitions. Word has length 55 [2023-02-16 03:11:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:53,570 INFO L495 AbstractCegarLoop]: Abstraction has 1085 states and 1510 transitions. [2023-02-16 03:11:53,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:53,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 1510 transitions. [2023-02-16 03:11:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-16 03:11:53,571 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:53,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:11:53,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2023-02-16 03:11:53,571 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:11:53,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:53,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2118551768, now seen corresponding path program 1 times [2023-02-16 03:11:53,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:53,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818396596] [2023-02-16 03:11:53,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:53,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:53,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:11:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:53,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:53,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818396596] [2023-02-16 03:11:53,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818396596] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:53,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:53,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-16 03:11:53,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244578993] [2023-02-16 03:11:53,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:53,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-16 03:11:53,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:53,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-16 03:11:53,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-02-16 03:11:53,870 INFO L87 Difference]: Start difference. First operand 1085 states and 1510 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 10 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:54,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:54,361 INFO L93 Difference]: Finished difference Result 1478 states and 2026 transitions. [2023-02-16 03:11:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 03:11:54,362 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 10 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-02-16 03:11:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:54,374 INFO L225 Difference]: With dead ends: 1478 [2023-02-16 03:11:54,374 INFO L226 Difference]: Without dead ends: 1478 [2023-02-16 03:11:54,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2023-02-16 03:11:54,375 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 911 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:54,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 813 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:11:54,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2023-02-16 03:11:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1233. [2023-02-16 03:11:54,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1103 states have (on average 1.455122393472348) internal successors, (1605), 1181 states have internal predecessors, (1605), 45 states have call successors, (45), 21 states have call predecessors, (45), 42 states have return successors, (90), 30 states have call predecessors, (90), 45 states have call successors, (90) [2023-02-16 03:11:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1740 transitions. [2023-02-16 03:11:54,391 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1740 transitions. Word has length 55 [2023-02-16 03:11:54,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:54,392 INFO L495 AbstractCegarLoop]: Abstraction has 1233 states and 1740 transitions. [2023-02-16 03:11:54,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 10 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:54,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1740 transitions. [2023-02-16 03:11:54,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-16 03:11:54,393 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:54,393 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:11:54,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2023-02-16 03:11:54,393 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:11:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:54,393 INFO L85 PathProgramCache]: Analyzing trace with hash 771798789, now seen corresponding path program 1 times [2023-02-16 03:11:54,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:54,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073811416] [2023-02-16 03:11:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:54,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:54,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:11:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:54,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 03:11:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 03:11:54,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:54,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073811416] [2023-02-16 03:11:54,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073811416] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:54,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:54,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:11:54,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010950737] [2023-02-16 03:11:54,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:54,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:11:54,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:54,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:11:54,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:11:54,492 INFO L87 Difference]: Start difference. First operand 1233 states and 1740 transitions. Second operand has 5 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-16 03:11:54,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:54,557 INFO L93 Difference]: Finished difference Result 1573 states and 2168 transitions. [2023-02-16 03:11:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:11:54,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 56 [2023-02-16 03:11:54,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:54,560 INFO L225 Difference]: With dead ends: 1573 [2023-02-16 03:11:54,560 INFO L226 Difference]: Without dead ends: 1573 [2023-02-16 03:11:54,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:11:54,561 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 260 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:54,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 418 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:11:54,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2023-02-16 03:11:54,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1232. [2023-02-16 03:11:54,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1103 states have (on average 1.4397098821396193) internal successors, (1588), 1180 states have internal predecessors, (1588), 45 states have call successors, (45), 21 states have call predecessors, (45), 42 states have return successors, (90), 30 states have call predecessors, (90), 45 states have call successors, (90) [2023-02-16 03:11:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1723 transitions. [2023-02-16 03:11:54,587 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1723 transitions. Word has length 56 [2023-02-16 03:11:54,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:54,587 INFO L495 AbstractCegarLoop]: Abstraction has 1232 states and 1723 transitions. [2023-02-16 03:11:54,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-16 03:11:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1723 transitions. [2023-02-16 03:11:54,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-16 03:11:54,588 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:54,588 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:11:54,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2023-02-16 03:11:54,589 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:11:54,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:54,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1935592645, now seen corresponding path program 1 times [2023-02-16 03:11:54,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:54,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071013387] [2023-02-16 03:11:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:54,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:55,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:11:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:55,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:55,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071013387] [2023-02-16 03:11:55,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071013387] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:55,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:55,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-02-16 03:11:55,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790718530] [2023-02-16 03:11:55,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:55,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-16 03:11:55,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:55,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-16 03:11:55,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-16 03:11:55,502 INFO L87 Difference]: Start difference. First operand 1232 states and 1723 transitions. Second operand has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:58,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:58,869 INFO L93 Difference]: Finished difference Result 2118 states and 2803 transitions. [2023-02-16 03:11:58,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-16 03:11:58,869 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-02-16 03:11:58,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:58,872 INFO L225 Difference]: With dead ends: 2118 [2023-02-16 03:11:58,872 INFO L226 Difference]: Without dead ends: 2118 [2023-02-16 03:11:58,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=464, Invalid=1792, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 03:11:58,872 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 1875 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1878 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:58,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1878 Valid, 2356 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-16 03:11:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2023-02-16 03:11:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1331. [2023-02-16 03:11:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1190 states have (on average 1.4436974789915966) internal successors, (1718), 1273 states have internal predecessors, (1718), 51 states have call successors, (51), 24 states have call predecessors, (51), 48 states have return successors, (102), 33 states have call predecessors, (102), 51 states have call successors, (102) [2023-02-16 03:11:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1871 transitions. [2023-02-16 03:11:58,893 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1871 transitions. Word has length 56 [2023-02-16 03:11:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:58,893 INFO L495 AbstractCegarLoop]: Abstraction has 1331 states and 1871 transitions. [2023-02-16 03:11:58,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:11:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1871 transitions. [2023-02-16 03:11:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-16 03:11:58,895 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:58,895 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:11:58,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2023-02-16 03:11:58,895 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:11:58,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1844041104, now seen corresponding path program 1 times [2023-02-16 03:11:58,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:58,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883107857] [2023-02-16 03:11:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:58,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:59,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:11:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:59,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 03:11:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 03:11:59,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:59,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883107857] [2023-02-16 03:11:59,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883107857] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:59,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:59,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-02-16 03:11:59,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601280677] [2023-02-16 03:11:59,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:59,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 03:11:59,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:59,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 03:11:59,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:11:59,908 INFO L87 Difference]: Start difference. First operand 1331 states and 1871 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:12:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:12:03,309 INFO L93 Difference]: Finished difference Result 3342 states and 4403 transitions. [2023-02-16 03:12:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-16 03:12:03,311 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2023-02-16 03:12:03,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:12:03,325 INFO L225 Difference]: With dead ends: 3342 [2023-02-16 03:12:03,325 INFO L226 Difference]: Without dead ends: 3340 [2023-02-16 03:12:03,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2023-02-16 03:12:03,326 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 3250 mSDsluCounter, 2757 mSDsCounter, 0 mSdLazyCounter, 1603 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3250 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:12:03,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3250 Valid, 2987 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1603 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-16 03:12:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2023-02-16 03:12:03,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 1325. [2023-02-16 03:12:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1184 states have (on average 1.4408783783783783) internal successors, (1706), 1267 states have internal predecessors, (1706), 51 states have call successors, (51), 24 states have call predecessors, (51), 48 states have return successors, (102), 33 states have call predecessors, (102), 51 states have call successors, (102) [2023-02-16 03:12:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1859 transitions. [2023-02-16 03:12:03,361 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1859 transitions. Word has length 57 [2023-02-16 03:12:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:12:03,362 INFO L495 AbstractCegarLoop]: Abstraction has 1325 states and 1859 transitions. [2023-02-16 03:12:03,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:12:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1859 transitions. [2023-02-16 03:12:03,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-16 03:12:03,363 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:12:03,363 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:12:03,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2023-02-16 03:12:03,363 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:12:03,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:12:03,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1845062045, now seen corresponding path program 1 times [2023-02-16 03:12:03,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:12:03,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212758749] [2023-02-16 03:12:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:03,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:12:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:03,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:12:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:03,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 03:12:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:12:03,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:12:03,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212758749] [2023-02-16 03:12:03,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212758749] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:12:03,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869174053] [2023-02-16 03:12:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:03,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:12:03,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:12:03,943 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:12:03,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 03:12:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:04,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-16 03:12:04,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:12:04,113 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:12:04,114 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 11 [2023-02-16 03:12:04,253 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 15 treesize of output 11 [2023-02-16 03:12:04,258 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 15 treesize of output 11 [2023-02-16 03:12:04,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:12:04,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-16 03:12:04,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:12:04,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-16 03:12:04,353 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 18 treesize of output 20 [2023-02-16 03:12:04,359 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 18 treesize of output 20 [2023-02-16 03:12:04,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 [2023-02-16 03:12:04,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 [2023-02-16 03:12:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:12:04,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:12:04,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869174053] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:12:04,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:12:04,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 23 [2023-02-16 03:12:04,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656904322] [2023-02-16 03:12:04,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:12:04,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 03:12:04,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:12:04,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 03:12:04,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2023-02-16 03:12:04,472 INFO L87 Difference]: Start difference. First operand 1325 states and 1859 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:12:05,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:12:05,283 INFO L93 Difference]: Finished difference Result 1869 states and 2541 transitions. [2023-02-16 03:12:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 03:12:05,283 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2023-02-16 03:12:05,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:12:05,286 INFO L225 Difference]: With dead ends: 1869 [2023-02-16 03:12:05,286 INFO L226 Difference]: Without dead ends: 1869 [2023-02-16 03:12:05,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2023-02-16 03:12:05,286 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 902 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:12:05,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 1241 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:12:05,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2023-02-16 03:12:05,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1330. [2023-02-16 03:12:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1189 states have (on average 1.4381833473507148) internal successors, (1710), 1272 states have internal predecessors, (1710), 51 states have call successors, (51), 24 states have call predecessors, (51), 48 states have return successors, (102), 33 states have call predecessors, (102), 51 states have call successors, (102) [2023-02-16 03:12:05,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1863 transitions. [2023-02-16 03:12:05,302 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1863 transitions. Word has length 57 [2023-02-16 03:12:05,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:12:05,302 INFO L495 AbstractCegarLoop]: Abstraction has 1330 states and 1863 transitions. [2023-02-16 03:12:05,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:12:05,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1863 transitions. [2023-02-16 03:12:05,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-16 03:12:05,303 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:12:05,303 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:12:05,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 03:12:05,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:12:05,508 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:12:05,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:12:05,508 INFO L85 PathProgramCache]: Analyzing trace with hash -886974100, now seen corresponding path program 1 times [2023-02-16 03:12:05,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:12:05,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470367927] [2023-02-16 03:12:05,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:05,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:12:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:05,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:12:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:12:05,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:12:05,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470367927] [2023-02-16 03:12:05,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470367927] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:12:05,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582204754] [2023-02-16 03:12:05,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:05,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:12:05,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:12:05,872 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:12:05,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 03:12:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:05,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-16 03:12:05,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:12:06,335 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 15 treesize of output 11 [2023-02-16 03:12:06,428 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 21 treesize of output 9 [2023-02-16 03:12:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:12:06,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:12:06,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582204754] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:12:06,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:12:06,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2023-02-16 03:12:06,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673598217] [2023-02-16 03:12:06,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:12:06,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 03:12:06,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:12:06,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 03:12:06,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-16 03:12:06,438 INFO L87 Difference]: Start difference. First operand 1330 states and 1863 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:12:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:12:06,937 INFO L93 Difference]: Finished difference Result 1707 states and 2332 transitions. [2023-02-16 03:12:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 03:12:06,949 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-02-16 03:12:06,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:12:06,951 INFO L225 Difference]: With dead ends: 1707 [2023-02-16 03:12:06,952 INFO L226 Difference]: Without dead ends: 1707 [2023-02-16 03:12:06,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2023-02-16 03:12:06,952 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 994 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:12:06,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 747 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:12:06,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2023-02-16 03:12:06,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1145. [2023-02-16 03:12:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1019 states have (on average 1.4268891069676153) internal successors, (1454), 1096 states have internal predecessors, (1454), 42 states have call successors, (42), 21 states have call predecessors, (42), 42 states have return successors, (84), 27 states have call predecessors, (84), 42 states have call successors, (84) [2023-02-16 03:12:06,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1580 transitions. [2023-02-16 03:12:06,964 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1580 transitions. Word has length 56 [2023-02-16 03:12:06,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:12:06,964 INFO L495 AbstractCegarLoop]: Abstraction has 1145 states and 1580 transitions. [2023-02-16 03:12:06,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:12:06,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1580 transitions. [2023-02-16 03:12:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-16 03:12:06,964 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:12:06,965 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:12:06,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 03:12:07,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-02-16 03:12:07,170 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:12:07,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:12:07,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1696320726, now seen corresponding path program 1 times [2023-02-16 03:12:07,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:12:07,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211427108] [2023-02-16 03:12:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:07,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:12:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:07,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:12:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:12:07,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:12:07,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211427108] [2023-02-16 03:12:07,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211427108] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:12:07,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:12:07,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-16 03:12:07,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463386222] [2023-02-16 03:12:07,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:12:07,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 03:12:07,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:12:07,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 03:12:07,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:12:07,686 INFO L87 Difference]: Start difference. First operand 1145 states and 1580 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:12:08,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:12:08,690 INFO L93 Difference]: Finished difference Result 1646 states and 2157 transitions. [2023-02-16 03:12:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 03:12:08,690 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-02-16 03:12:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:12:08,692 INFO L225 Difference]: With dead ends: 1646 [2023-02-16 03:12:08,692 INFO L226 Difference]: Without dead ends: 1646 [2023-02-16 03:12:08,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2023-02-16 03:12:08,693 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 905 mSDsluCounter, 1830 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 2123 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 03:12:08,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 2123 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 03:12:08,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2023-02-16 03:12:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 986. [2023-02-16 03:12:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 876 states have (on average 1.41324200913242) internal successors, (1238), 945 states have internal predecessors, (1238), 34 states have call successors, (34), 17 states have call predecessors, (34), 34 states have return successors, (68), 23 states have call predecessors, (68), 34 states have call successors, (68) [2023-02-16 03:12:08,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1340 transitions. [2023-02-16 03:12:08,703 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1340 transitions. Word has length 56 [2023-02-16 03:12:08,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:12:08,703 INFO L495 AbstractCegarLoop]: Abstraction has 986 states and 1340 transitions. [2023-02-16 03:12:08,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:12:08,703 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1340 transitions. [2023-02-16 03:12:08,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-16 03:12:08,704 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:12:08,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:12:08,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2023-02-16 03:12:08,704 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:12:08,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:12:08,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1949478456, now seen corresponding path program 1 times [2023-02-16 03:12:08,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:12:08,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641754991] [2023-02-16 03:12:08,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:08,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:12:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:09,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:12:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:09,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-16 03:12:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 03:12:09,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:12:09,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641754991] [2023-02-16 03:12:09,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641754991] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:12:09,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213070661] [2023-02-16 03:12:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:09,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:12:09,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:12:09,680 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:12:09,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 03:12:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:09,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-16 03:12:09,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:12:09,860 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 [2023-02-16 03:12:10,141 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 15 treesize of output 11 [2023-02-16 03:12:10,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:12:10,195 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 29 treesize of output 28 [2023-02-16 03:12:10,342 INFO L321 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2023-02-16 03:12:10,343 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 2 case distinctions, treesize of input 23 treesize of output 33 [2023-02-16 03:12:10,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-02-16 03:12:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:12:10,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:12:10,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213070661] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:12:10,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:12:10,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 28 [2023-02-16 03:12:10,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172395856] [2023-02-16 03:12:10,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:12:10,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-16 03:12:10,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:12:10,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-16 03:12:10,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2023-02-16 03:12:10,519 INFO L87 Difference]: Start difference. First operand 986 states and 1340 transitions. Second operand has 29 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 26 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 03:12:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:12:13,204 INFO L93 Difference]: Finished difference Result 1844 states and 2421 transitions. [2023-02-16 03:12:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-16 03:12:13,204 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 26 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 58 [2023-02-16 03:12:13,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:12:13,207 INFO L225 Difference]: With dead ends: 1844 [2023-02-16 03:12:13,207 INFO L226 Difference]: Without dead ends: 1844 [2023-02-16 03:12:13,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=824, Invalid=3466, Unknown=0, NotChecked=0, Total=4290 [2023-02-16 03:12:13,207 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 3909 mSDsluCounter, 1784 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3910 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:12:13,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3910 Valid, 1941 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-16 03:12:13,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2023-02-16 03:12:13,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1112. [2023-02-16 03:12:13,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 986 states have (on average 1.4036511156186613) internal successors, (1384), 1061 states have internal predecessors, (1384), 42 states have call successors, (42), 21 states have call predecessors, (42), 42 states have return successors, (84), 29 states have call predecessors, (84), 42 states have call successors, (84) [2023-02-16 03:12:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1510 transitions. [2023-02-16 03:12:13,220 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1510 transitions. Word has length 58 [2023-02-16 03:12:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:12:13,220 INFO L495 AbstractCegarLoop]: Abstraction has 1112 states and 1510 transitions. [2023-02-16 03:12:13,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 26 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 03:12:13,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1510 transitions. [2023-02-16 03:12:13,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-16 03:12:13,221 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:12:13,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:12:13,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 03:12:13,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:12:13,427 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:12:13,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:12:13,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1949478457, now seen corresponding path program 1 times [2023-02-16 03:12:13,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:12:13,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255537755] [2023-02-16 03:12:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:13,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:12:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:14,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:12:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:14,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-16 03:12:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 03:12:14,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:12:14,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255537755] [2023-02-16 03:12:14,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255537755] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:12:14,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587184358] [2023-02-16 03:12:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:14,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:12:14,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:12:14,373 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:12:14,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 03:12:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:14,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-16 03:12:14,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:12:14,570 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 [2023-02-16 03:12:14,973 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 15 treesize of output 11 [2023-02-16 03:12:14,987 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 15 treesize of output 11 [2023-02-16 03:12:15,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:12:15,061 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 27 treesize of output 26 [2023-02-16 03:12:15,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:12:15,068 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 42 treesize of output 33 [2023-02-16 03:12:15,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:12:15,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 20 [2023-02-16 03:12:15,301 INFO L321 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2023-02-16 03:12:15,301 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 17 treesize of output 17 [2023-02-16 03:12:15,449 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:12:15,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2023-02-16 03:12:15,466 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:12:15,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-02-16 03:12:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:12:15,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:12:15,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587184358] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:12:15,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:12:15,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 30 [2023-02-16 03:12:15,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072193191] [2023-02-16 03:12:15,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:12:15,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-16 03:12:15,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:12:15,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-16 03:12:15,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2023-02-16 03:12:15,930 INFO L87 Difference]: Start difference. First operand 1112 states and 1510 transitions. Second operand has 31 states, 30 states have (on average 3.5) internal successors, (105), 28 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 03:12:20,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:12:20,331 INFO L93 Difference]: Finished difference Result 2538 states and 3406 transitions. [2023-02-16 03:12:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-16 03:12:20,331 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.5) internal successors, (105), 28 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 58 [2023-02-16 03:12:20,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:12:20,334 INFO L225 Difference]: With dead ends: 2538 [2023-02-16 03:12:20,334 INFO L226 Difference]: Without dead ends: 2538 [2023-02-16 03:12:20,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=978, Invalid=4874, Unknown=0, NotChecked=0, Total=5852 [2023-02-16 03:12:20,335 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 6467 mSDsluCounter, 2262 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6468 SdHoareTripleChecker+Valid, 2408 SdHoareTripleChecker+Invalid, 2666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-16 03:12:20,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6468 Valid, 2408 Invalid, 2666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 2301 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-16 03:12:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2023-02-16 03:12:20,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 1206. [2023-02-16 03:12:20,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1072 states have (on average 1.4188432835820894) internal successors, (1521), 1150 states have internal predecessors, (1521), 46 states have call successors, (46), 23 states have call predecessors, (46), 46 states have return successors, (92), 32 states have call predecessors, (92), 46 states have call successors, (92) [2023-02-16 03:12:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1659 transitions. [2023-02-16 03:12:20,362 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1659 transitions. Word has length 58 [2023-02-16 03:12:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:12:20,362 INFO L495 AbstractCegarLoop]: Abstraction has 1206 states and 1659 transitions. [2023-02-16 03:12:20,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.5) internal successors, (105), 28 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 03:12:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1659 transitions. [2023-02-16 03:12:20,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-16 03:12:20,364 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:12:20,364 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:12:20,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-16 03:12:20,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-02-16 03:12:20,569 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:12:20,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:12:20,570 INFO L85 PathProgramCache]: Analyzing trace with hash 193064434, now seen corresponding path program 1 times [2023-02-16 03:12:20,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:12:20,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182601092] [2023-02-16 03:12:20,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:20,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:12:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:22,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:12:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:22,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-02-16 03:12:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:12:22,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:12:22,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182601092] [2023-02-16 03:12:22,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182601092] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:12:22,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537835038] [2023-02-16 03:12:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:22,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:12:22,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:12:22,621 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:12:22,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 03:12:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:22,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-16 03:12:22,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:12:23,247 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 15 treesize of output 11 [2023-02-16 03:12:23,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:12:23,441 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 30 treesize of output 23 [2023-02-16 03:12:23,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:12:23,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:12:23,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:12:23,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:12:23,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 52 [2023-02-16 03:12:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:12:24,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:12:24,590 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 80 treesize of output 74 [2023-02-16 03:12:24,623 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 104 treesize of output 98 [2023-02-16 03:12:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:12:25,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537835038] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:12:25,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:12:25,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16, 17] total 54 [2023-02-16 03:12:25,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466308400] [2023-02-16 03:12:25,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:12:25,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-16 03:12:25,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:12:25,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-16 03:12:25,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2674, Unknown=0, NotChecked=0, Total=2862 [2023-02-16 03:12:25,280 INFO L87 Difference]: Start difference. First operand 1206 states and 1659 transitions. Second operand has 54 states, 54 states have (on average 2.8518518518518516) internal successors, (154), 51 states have internal predecessors, (154), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:13:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:13:32,183 INFO L93 Difference]: Finished difference Result 10593 states and 13413 transitions. [2023-02-16 03:13:32,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2023-02-16 03:13:32,184 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.8518518518518516) internal successors, (154), 51 states have internal predecessors, (154), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 58 [2023-02-16 03:13:32,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:13:32,196 INFO L225 Difference]: With dead ends: 10593 [2023-02-16 03:13:32,196 INFO L226 Difference]: Without dead ends: 10577 [2023-02-16 03:13:32,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81734 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=22647, Invalid=178505, Unknown=0, NotChecked=0, Total=201152 [2023-02-16 03:13:32,211 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 10285 mSDsluCounter, 19998 mSDsCounter, 0 mSdLazyCounter, 20088 mSolverCounterSat, 1390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10285 SdHoareTripleChecker+Valid, 20617 SdHoareTripleChecker+Invalid, 21478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1390 IncrementalHoareTripleChecker+Valid, 20088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:13:32,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10285 Valid, 20617 Invalid, 21478 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1390 Valid, 20088 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2023-02-16 03:13:32,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10577 states. [2023-02-16 03:13:32,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10577 to 1987. [2023-02-16 03:13:32,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1780 states have (on average 1.400561797752809) internal successors, (2493), 1887 states have internal predecessors, (2493), 83 states have call successors, (83), 41 states have call predecessors, (83), 82 states have return successors, (166), 58 states have call predecessors, (166), 83 states have call successors, (166) [2023-02-16 03:13:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 2742 transitions. [2023-02-16 03:13:32,265 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 2742 transitions. Word has length 58 [2023-02-16 03:13:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:13:32,265 INFO L495 AbstractCegarLoop]: Abstraction has 1987 states and 2742 transitions. [2023-02-16 03:13:32,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.8518518518518516) internal successors, (154), 51 states have internal predecessors, (154), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:13:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 2742 transitions. [2023-02-16 03:13:32,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-16 03:13:32,266 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:13:32,266 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:13:32,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-16 03:13:32,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-02-16 03:13:32,471 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:13:32,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:13:32,472 INFO L85 PathProgramCache]: Analyzing trace with hash -411669398, now seen corresponding path program 1 times [2023-02-16 03:13:32,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:13:32,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525496304] [2023-02-16 03:13:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:13:32,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:13:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:13:32,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:13:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:13:32,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-16 03:13:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:13:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:13:32,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:13:32,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525496304] [2023-02-16 03:13:32,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525496304] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:13:32,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365761536] [2023-02-16 03:13:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:13:32,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:13:32,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:13:32,910 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:13:32,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 03:13:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:13:33,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-16 03:13:33,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:13:33,098 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 [2023-02-16 03:13:33,433 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 15 treesize of output 11 [2023-02-16 03:13:33,653 INFO L321 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2023-02-16 03:13:33,653 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 2 case distinctions, treesize of input 25 treesize of output 37 [2023-02-16 03:13:33,777 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:13:33,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-02-16 03:13:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:13:33,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:13:33,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365761536] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:13:33,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:13:33,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2023-02-16 03:13:33,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251958436] [2023-02-16 03:13:33,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:13:33,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-16 03:13:33,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:13:33,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-16 03:13:33,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-02-16 03:13:33,865 INFO L87 Difference]: Start difference. First operand 1987 states and 2742 transitions. Second operand has 22 states, 21 states have (on average 5.142857142857143) internal successors, (108), 20 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 03:13:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:13:35,670 INFO L93 Difference]: Finished difference Result 2486 states and 3442 transitions. [2023-02-16 03:13:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-16 03:13:35,671 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.142857142857143) internal successors, (108), 20 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2023-02-16 03:13:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:13:35,674 INFO L225 Difference]: With dead ends: 2486 [2023-02-16 03:13:35,674 INFO L226 Difference]: Without dead ends: 2486 [2023-02-16 03:13:35,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=340, Invalid=1300, Unknown=0, NotChecked=0, Total=1640 [2023-02-16 03:13:35,674 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 1923 mSDsluCounter, 1797 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1923 SdHoareTripleChecker+Valid, 1977 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:13:35,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1923 Valid, 1977 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-16 03:13:35,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2023-02-16 03:13:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2009. [2023-02-16 03:13:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1802 states have (on average 1.3995560488346281) internal successors, (2522), 1907 states have internal predecessors, (2522), 83 states have call successors, (83), 41 states have call predecessors, (83), 82 states have return successors, (166), 60 states have call predecessors, (166), 83 states have call successors, (166) [2023-02-16 03:13:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2771 transitions. [2023-02-16 03:13:35,693 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2771 transitions. Word has length 59 [2023-02-16 03:13:35,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:13:35,693 INFO L495 AbstractCegarLoop]: Abstraction has 2009 states and 2771 transitions. [2023-02-16 03:13:35,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.142857142857143) internal successors, (108), 20 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 03:13:35,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2771 transitions. [2023-02-16 03:13:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-16 03:13:35,694 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:13:35,694 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:13:35,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 03:13:35,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-02-16 03:13:35,899 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:13:35,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:13:35,899 INFO L85 PathProgramCache]: Analyzing trace with hash -411669397, now seen corresponding path program 1 times [2023-02-16 03:13:35,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:13:35,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082595347] [2023-02-16 03:13:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:13:35,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:13:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:13:36,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:13:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:13:36,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-16 03:13:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:13:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:13:36,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:13:36,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082595347] [2023-02-16 03:13:36,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082595347] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:13:36,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486240511] [2023-02-16 03:13:36,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:13:36,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:13:36,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:13:36,820 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:13:36,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 03:13:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:13:36,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-16 03:13:36,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:13:37,009 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 [2023-02-16 03:13:37,453 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 15 treesize of output 11 [2023-02-16 03:13:37,457 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 15 treesize of output 11 [2023-02-16 03:13:37,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:13:37,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 20 treesize of output 22 [2023-02-16 03:13:37,723 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-02-16 03:13:37,723 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 19 treesize of output 19 [2023-02-16 03:13:37,928 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:13:37,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-16 03:13:37,935 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:13:37,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-02-16 03:13:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:13:37,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:13:42,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486240511] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:13:42,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:13:42,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 27 [2023-02-16 03:13:42,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234053434] [2023-02-16 03:13:42,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:13:42,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-16 03:13:42,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:13:42,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-16 03:13:42,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 03:13:42,265 INFO L87 Difference]: Start difference. First operand 2009 states and 2771 transitions. Second operand has 28 states, 27 states have (on average 4.037037037037037) internal successors, (109), 26 states have internal predecessors, (109), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 03:13:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:13:45,293 INFO L93 Difference]: Finished difference Result 2541 states and 3486 transitions. [2023-02-16 03:13:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 03:13:45,293 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.037037037037037) internal successors, (109), 26 states have internal predecessors, (109), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2023-02-16 03:13:45,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:13:45,296 INFO L225 Difference]: With dead ends: 2541 [2023-02-16 03:13:45,296 INFO L226 Difference]: Without dead ends: 2541 [2023-02-16 03:13:45,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=446, Invalid=2104, Unknown=0, NotChecked=0, Total=2550 [2023-02-16 03:13:45,296 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 2595 mSDsluCounter, 2098 mSDsCounter, 0 mSdLazyCounter, 2432 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2595 SdHoareTripleChecker+Valid, 2258 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-16 03:13:45,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2595 Valid, 2258 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2432 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-16 03:13:45,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2023-02-16 03:13:45,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2009. [2023-02-16 03:13:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1802 states have (on average 1.3984461709211986) internal successors, (2520), 1907 states have internal predecessors, (2520), 83 states have call successors, (83), 41 states have call predecessors, (83), 82 states have return successors, (166), 60 states have call predecessors, (166), 83 states have call successors, (166) [2023-02-16 03:13:45,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2769 transitions. [2023-02-16 03:13:45,312 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2769 transitions. Word has length 59 [2023-02-16 03:13:45,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:13:45,312 INFO L495 AbstractCegarLoop]: Abstraction has 2009 states and 2769 transitions. [2023-02-16 03:13:45,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.037037037037037) internal successors, (109), 26 states have internal predecessors, (109), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 03:13:45,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2769 transitions. [2023-02-16 03:13:45,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-16 03:13:45,313 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:13:45,313 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:13:45,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 03:13:45,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-02-16 03:13:45,519 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:13:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:13:45,519 INFO L85 PathProgramCache]: Analyzing trace with hash -627848605, now seen corresponding path program 1 times [2023-02-16 03:13:45,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:13:45,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080423076] [2023-02-16 03:13:45,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:13:45,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:13:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:13:46,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:13:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:13:46,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-16 03:13:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:13:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:13:46,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:13:46,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080423076] [2023-02-16 03:13:46,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080423076] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:13:46,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152573469] [2023-02-16 03:13:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:13:46,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:13:46,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:13:46,207 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:13:46,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 03:13:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:13:46,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-16 03:13:46,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:13:46,685 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 15 treesize of output 11 [2023-02-16 03:13:46,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:13:46,834 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 29 treesize of output 28 [2023-02-16 03:13:47,074 INFO L321 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2023-02-16 03:13:47,074 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 2 case distinctions, treesize of input 25 treesize of output 37 [2023-02-16 03:13:47,174 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:13:47,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2023-02-16 03:13:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:13:47,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:13:47,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152573469] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:13:47,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:13:47,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2023-02-16 03:13:47,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288019432] [2023-02-16 03:13:47,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:13:47,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-16 03:13:47,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:13:47,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-16 03:13:47,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2023-02-16 03:13:47,288 INFO L87 Difference]: Start difference. First operand 2009 states and 2769 transitions. Second operand has 27 states, 26 states have (on average 4.153846153846154) internal successors, (108), 23 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 03:13:49,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:13:49,904 INFO L93 Difference]: Finished difference Result 2783 states and 3724 transitions. [2023-02-16 03:13:49,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-16 03:13:49,905 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.153846153846154) internal successors, (108), 23 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2023-02-16 03:13:49,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:13:49,908 INFO L225 Difference]: With dead ends: 2783 [2023-02-16 03:13:49,908 INFO L226 Difference]: Without dead ends: 2783 [2023-02-16 03:13:49,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=426, Invalid=1830, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 03:13:49,908 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 2009 mSDsluCounter, 4159 mSDsCounter, 0 mSdLazyCounter, 2724 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2011 SdHoareTripleChecker+Valid, 4466 SdHoareTripleChecker+Invalid, 2780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-16 03:13:49,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2011 Valid, 4466 Invalid, 2780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2724 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-16 03:13:49,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2023-02-16 03:13:49,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2077. [2023-02-16 03:13:49,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 1866 states have (on average 1.3960342979635585) internal successors, (2605), 1969 states have internal predecessors, (2605), 85 states have call successors, (85), 42 states have call predecessors, (85), 84 states have return successors, (170), 65 states have call predecessors, (170), 85 states have call successors, (170) [2023-02-16 03:13:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 2860 transitions. [2023-02-16 03:13:49,926 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 2860 transitions. Word has length 59 [2023-02-16 03:13:49,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:13:49,927 INFO L495 AbstractCegarLoop]: Abstraction has 2077 states and 2860 transitions. [2023-02-16 03:13:49,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.153846153846154) internal successors, (108), 23 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 03:13:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 2860 transitions. [2023-02-16 03:13:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-16 03:13:49,927 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:13:49,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:13:49,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-16 03:13:50,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:13:50,133 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:13:50,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:13:50,134 INFO L85 PathProgramCache]: Analyzing trace with hash -627848604, now seen corresponding path program 1 times [2023-02-16 03:13:50,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:13:50,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175992074] [2023-02-16 03:13:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:13:50,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:13:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:13:52,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:13:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:13:52,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-16 03:13:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:13:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 03:13:52,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:13:52,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175992074] [2023-02-16 03:13:52,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175992074] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:13:52,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67074862] [2023-02-16 03:13:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:13:52,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:13:52,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:13:52,373 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:13:52,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-16 03:13:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:13:52,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-16 03:13:52,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:13:52,681 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 [2023-02-16 03:13:52,689 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 [2023-02-16 03:13:53,090 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 15 treesize of output 11 [2023-02-16 03:13:53,097 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 15 treesize of output 11 [2023-02-16 03:13:53,196 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-02-16 03:13:53,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2023-02-16 03:13:53,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:13:53,202 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 42 treesize of output 33 [2023-02-16 03:13:53,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:13:53,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:13:53,425 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-16 03:13:53,426 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 15 treesize of output 15 [2023-02-16 03:13:53,557 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 [2023-02-16 03:13:53,560 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 17 treesize of output 9 [2023-02-16 03:13:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:13:53,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:13:57,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67074862] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:13:57,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:13:57,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 33 [2023-02-16 03:13:57,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289494513] [2023-02-16 03:13:57,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:13:57,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-16 03:13:57,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:13:57,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-16 03:13:57,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1349, Unknown=0, NotChecked=0, Total=1482 [2023-02-16 03:13:57,987 INFO L87 Difference]: Start difference. First operand 2077 states and 2860 transitions. Second operand has 34 states, 33 states have (on average 3.242424242424242) internal successors, (107), 30 states have internal predecessors, (107), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 03:14:06,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:14:06,893 INFO L93 Difference]: Finished difference Result 3168 states and 4176 transitions. [2023-02-16 03:14:06,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-02-16 03:14:06,897 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.242424242424242) internal successors, (107), 30 states have internal predecessors, (107), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2023-02-16 03:14:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:14:06,901 INFO L225 Difference]: With dead ends: 3168 [2023-02-16 03:14:06,901 INFO L226 Difference]: Without dead ends: 3168 [2023-02-16 03:14:06,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2633 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1278, Invalid=8034, Unknown=0, NotChecked=0, Total=9312 [2023-02-16 03:14:06,902 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 2533 mSDsluCounter, 4371 mSDsCounter, 0 mSdLazyCounter, 4795 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2533 SdHoareTripleChecker+Valid, 4646 SdHoareTripleChecker+Invalid, 4928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 4795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:14:06,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2533 Valid, 4646 Invalid, 4928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 4795 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-02-16 03:14:06,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2023-02-16 03:14:06,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2178. [2023-02-16 03:14:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 1955 states have (on average 1.3933503836317136) internal successors, (2724), 2064 states have internal predecessors, (2724), 91 states have call successors, (91), 45 states have call predecessors, (91), 90 states have return successors, (182), 68 states have call predecessors, (182), 91 states have call successors, (182) [2023-02-16 03:14:06,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 2997 transitions. [2023-02-16 03:14:06,922 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 2997 transitions. Word has length 59 [2023-02-16 03:14:06,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:14:06,923 INFO L495 AbstractCegarLoop]: Abstraction has 2178 states and 2997 transitions. [2023-02-16 03:14:06,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.242424242424242) internal successors, (107), 30 states have internal predecessors, (107), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 03:14:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 2997 transitions. [2023-02-16 03:14:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-16 03:14:06,923 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:14:06,924 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:14:06,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-16 03:14:07,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:14:07,129 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-16 03:14:07,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:14:07,129 INFO L85 PathProgramCache]: Analyzing trace with hash -990115430, now seen corresponding path program 1 times [2023-02-16 03:14:07,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:14:07,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615293745] [2023-02-16 03:14:07,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:14:07,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:14:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:14:09,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 03:14:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:14:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:14:09,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:14:09,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615293745] [2023-02-16 03:14:09,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615293745] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:14:09,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814119616] [2023-02-16 03:14:09,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:14:09,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:14:09,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:14:09,400 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:14:09,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-16 03:14:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:14:09,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 87 conjunts are in the unsatisfiable core [2023-02-16 03:14:09,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:14:09,622 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:14:09,622 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 11 [2023-02-16 03:14:09,899 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 15 treesize of output 11 [2023-02-16 03:14:09,907 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 15 treesize of output 11 [2023-02-16 03:14:10,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:14:10,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-16 03:14:10,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:14:10,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-16 03:14:10,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:14:10,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-02-16 03:14:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:14:10,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-02-16 03:14:10,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:14:10,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:14:10,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:14:10,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:14:10,508 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 25 treesize of output 24 [2023-02-16 03:14:10,517 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 24 treesize of output 26 [2023-02-16 03:14:10,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:14:10,609 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:14:10,619 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-02-16 03:14:10,619 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 52 treesize of output 49 [2023-02-16 03:14:10,629 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 20 treesize of output 22 [2023-02-16 03:14:10,966 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:14:10,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:14:10,976 INFO L321 Elim1Store]: treesize reduction 45, result has 15.1 percent of original size [2023-02-16 03:14:10,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 45 [2023-02-16 03:14:10,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:14:10,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2023-02-16 03:14:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:14:11,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:14:11,416 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|)) (.cse3 (+ |c_ULTIMATE.start_append_one_~list#1.offset| (* ~unnamed1~0~LIST_END 4))) (.cse1 (+ (* ~unnamed1~0~LIST_BEG 4) |c_~#list~0.offset|))) (and (forall ((v_ArrVal_1995 Int)) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse2 .cse3 v_ArrVal_1995)))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) .cse1))) 4) 0)) (forall ((v_ArrVal_1993 (Array Int Int)) (v_ArrVal_1995 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1993) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse2 .cse3 v_ArrVal_1995)) |c_~#list~0.base|) .cse1)) 4) 0)))) is different from false [2023-02-16 03:14:16,031 INFO L321 Elim1Store]: treesize reduction 62, result has 47.9 percent of original size [2023-02-16 03:14:16,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 127 [2023-02-16 03:14:16,086 INFO L321 Elim1Store]: treesize reduction 62, result has 47.9 percent of original size [2023-02-16 03:14:16,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 103 [2023-02-16 03:14:16,123 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:14:16,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 332 treesize of output 344 [2023-02-16 03:14:16,349 INFO L321 Elim1Store]: treesize reduction 138, result has 68.7 percent of original size [2023-02-16 03:14:16,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 2460 treesize of output 2494 [2023-02-16 03:14:16,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2162 treesize of output 2134 [2023-02-16 03:14:16,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2134 treesize of output 2078 [2023-02-16 03:14:16,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6386 treesize of output 5816 [2023-02-16 03:14:16,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4