./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/list-ext_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e 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/list-ext-properties/list-ext_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e978ccdde62c7126e7c77a584896efdc6e7afe04b6752d127d7236cecdea192f --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 20:53:26,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 20:53:26,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 20:53:26,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 20:53:26,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 20:53:26,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 20:53:26,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 20:53:26,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 20:53:26,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 20:53:26,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 20:53:26,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 20:53:26,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 20:53:26,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 20:53:26,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 20:53:26,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 20:53:26,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 20:53:26,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 20:53:26,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 20:53:26,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 20:53:26,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 20:53:26,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 20:53:26,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 20:53:26,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 20:53:26,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 20:53:26,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 20:53:26,284 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 20:53:26,285 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 20:53:26,286 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 20:53:26,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 20:53:26,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 20:53:26,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 20:53:26,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 20:53:26,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 20:53:26,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 20:53:26,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 20:53:26,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 20:53:26,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 20:53:26,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 20:53:26,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 20:53:26,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 20:53:26,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 20:53:26,293 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 20:53:26,315 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 20:53:26,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 20:53:26,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 20:53:26,316 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 20:53:26,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 20:53:26,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 20:53:26,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 20:53:26,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 20:53:26,317 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 20:53:26,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 20:53:26,318 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 20:53:26,318 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 20:53:26,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 20:53:26,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 20:53:26,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 20:53:26,319 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 20:53:26,319 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 20:53:26,319 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 20:53:26,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 20:53:26,319 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 20:53:26,319 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 20:53:26,319 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 20:53:26,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 20:53:26,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 20:53:26,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 20:53:26,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 20:53:26,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 20:53:26,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 20:53:26,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 20:53:26,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 20:53:26,321 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 20:53:26,321 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 20:53:26,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 20:53:26,322 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 20:53:26,322 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e978ccdde62c7126e7c77a584896efdc6e7afe04b6752d127d7236cecdea192f [2023-02-18 20:53:26,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 20:53:26,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 20:53:26,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 20:53:26,558 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 20:53:26,559 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 20:53:26,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/list-ext_1.i [2023-02-18 20:53:27,500 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 20:53:27,716 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 20:53:27,716 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/list-ext_1.i [2023-02-18 20:53:27,724 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/812d9d142/ed6bafa68cbb41a1bfe0603967a92b7c/FLAG5d7d416b2 [2023-02-18 20:53:27,733 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/812d9d142/ed6bafa68cbb41a1bfe0603967a92b7c [2023-02-18 20:53:27,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 20:53:27,736 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 20:53:27,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 20:53:27,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 20:53:27,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 20:53:27,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:53:27" (1/1) ... [2023-02-18 20:53:27,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a964bd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:27, skipping insertion in model container [2023-02-18 20:53:27,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:53:27" (1/1) ... [2023-02-18 20:53:27,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 20:53:27,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 20:53:27,941 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/list-ext_1.i[23553,23566] [2023-02-18 20:53:27,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 20:53:27,960 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 20:53:28,002 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/list-ext_1.i[23553,23566] [2023-02-18 20:53:28,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 20:53:28,020 INFO L208 MainTranslator]: Completed translation [2023-02-18 20:53:28,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:28 WrapperNode [2023-02-18 20:53:28,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 20:53:28,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 20:53:28,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 20:53:28,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 20:53:28,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:28" (1/1) ... [2023-02-18 20:53:28,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:28" (1/1) ... [2023-02-18 20:53:28,059 INFO L138 Inliner]: procedures = 124, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 128 [2023-02-18 20:53:28,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 20:53:28,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 20:53:28,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 20:53:28,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 20:53:28,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:28" (1/1) ... [2023-02-18 20:53:28,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:28" (1/1) ... [2023-02-18 20:53:28,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:28" (1/1) ... [2023-02-18 20:53:28,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:28" (1/1) ... [2023-02-18 20:53:28,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:28" (1/1) ... [2023-02-18 20:53:28,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:28" (1/1) ... [2023-02-18 20:53:28,078 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:28" (1/1) ... [2023-02-18 20:53:28,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:28" (1/1) ... [2023-02-18 20:53:28,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 20:53:28,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 20:53:28,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 20:53:28,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 20:53:28,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:28" (1/1) ... [2023-02-18 20:53:28,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 20:53:28,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:53:28,104 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) [2023-02-18 20:53:28,110 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 [2023-02-18 20:53:28,132 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-02-18 20:53:28,132 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-02-18 20:53:28,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 20:53:28,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 20:53:28,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 20:53:28,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 20:53:28,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 20:53:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 20:53:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 20:53:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 20:53:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 20:53:28,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 20:53:28,204 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 20:53:28,205 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 20:53:28,235 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-02-18 20:53:28,390 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 20:53:28,395 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 20:53:28,395 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-18 20:53:28,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:53:28 BoogieIcfgContainer [2023-02-18 20:53:28,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 20:53:28,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 20:53:28,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 20:53:28,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 20:53:28,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 08:53:27" (1/3) ... [2023-02-18 20:53:28,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c333d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:53:28, skipping insertion in model container [2023-02-18 20:53:28,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:28" (2/3) ... [2023-02-18 20:53:28,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c333d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:53:28, skipping insertion in model container [2023-02-18 20:53:28,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:53:28" (3/3) ... [2023-02-18 20:53:28,402 INFO L112 eAbstractionObserver]: Analyzing ICFG list-ext_1.i [2023-02-18 20:53:28,412 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 20:53:28,412 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-02-18 20:53:28,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 20:53:28,444 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;@52d5244b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 20:53:28,456 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-02-18 20:53:28,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 91 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:28,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 20:53:28,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:53:28,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:53:28,476 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-18 20:53:28,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:53:28,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2098269937, now seen corresponding path program 1 times [2023-02-18 20:53:28,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:53:28,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911222557] [2023-02-18 20:53:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:53:28,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:53:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:53:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:53:28,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:53:28,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911222557] [2023-02-18 20:53:28,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911222557] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:53:28,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:53:28,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:53:28,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604641959] [2023-02-18 20:53:28,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:53:28,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 20:53:28,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:53:28,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 20:53:28,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 20:53:28,607 INFO L87 Difference]: Start difference. First operand has 93 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 91 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 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) [2023-02-18 20:53:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:53:28,621 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2023-02-18 20:53:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 20:53:28,623 INFO L78 Accepts]: Start accepts. Automaton has has 2 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 [2023-02-18 20:53:28,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:53:28,628 INFO L225 Difference]: With dead ends: 93 [2023-02-18 20:53:28,628 INFO L226 Difference]: Without dead ends: 86 [2023-02-18 20:53:28,629 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 [2023-02-18 20:53:28,631 INFO L413 NwaCegarLoop]: 102 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, 102 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 [2023-02-18 20:53:28,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:53:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-18 20:53:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-02-18 20:53:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 85 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2023-02-18 20:53:28,655 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 7 [2023-02-18 20:53:28,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:53:28,655 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2023-02-18 20:53:28,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 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) [2023-02-18 20:53:28,655 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2023-02-18 20:53:28,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 20:53:28,656 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:53:28,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:53:28,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 20:53:28,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-18 20:53:28,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:53:28,657 INFO L85 PathProgramCache]: Analyzing trace with hash 620871786, now seen corresponding path program 1 times [2023-02-18 20:53:28,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:53:28,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979948491] [2023-02-18 20:53:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:53:28,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:53:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:53:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:53:28,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:53:28,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979948491] [2023-02-18 20:53:28,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979948491] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:53:28,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:53:28,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:53:28,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791062574] [2023-02-18 20:53:28,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:53:28,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:53:28,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:53:28,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:53:28,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:53:28,752 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:28,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:53:28,914 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2023-02-18 20:53:28,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 20:53:28,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 20:53:28,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:53:28,916 INFO L225 Difference]: With dead ends: 107 [2023-02-18 20:53:28,917 INFO L226 Difference]: Without dead ends: 107 [2023-02-18 20:53:28,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:53:28,919 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 162 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:53:28,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 52 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:53:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-18 20:53:28,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2023-02-18 20:53:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 86 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2023-02-18 20:53:28,933 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 8 [2023-02-18 20:53:28,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:53:28,933 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2023-02-18 20:53:28,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:28,934 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2023-02-18 20:53:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 20:53:28,934 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:53:28,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:53:28,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 20:53:28,936 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-18 20:53:28,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:53:28,940 INFO L85 PathProgramCache]: Analyzing trace with hash 620871787, now seen corresponding path program 1 times [2023-02-18 20:53:28,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:53:28,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046740801] [2023-02-18 20:53:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:53:28,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:53:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:53:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:53:29,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:53:29,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046740801] [2023-02-18 20:53:29,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046740801] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:53:29,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:53:29,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:53:29,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434541882] [2023-02-18 20:53:29,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:53:29,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:53:29,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:53:29,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:53:29,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:53:29,124 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:29,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:53:29,255 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2023-02-18 20:53:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:53:29,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 20:53:29,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:53:29,260 INFO L225 Difference]: With dead ends: 124 [2023-02-18 20:53:29,261 INFO L226 Difference]: Without dead ends: 124 [2023-02-18 20:53:29,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:53:29,267 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 170 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:53:29,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 60 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:53:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-18 20:53:29,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2023-02-18 20:53:29,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 80 states have (on average 1.5125) internal successors, (121), 106 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:29,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2023-02-18 20:53:29,283 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 8 [2023-02-18 20:53:29,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:53:29,284 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2023-02-18 20:53:29,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:29,284 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2023-02-18 20:53:29,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 20:53:29,285 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:53:29,285 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:53:29,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 20:53:29,286 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-18 20:53:29,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:53:29,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1332204644, now seen corresponding path program 1 times [2023-02-18 20:53:29,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:53:29,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139708325] [2023-02-18 20:53:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:53:29,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:53:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:53:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:53:29,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:53:29,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139708325] [2023-02-18 20:53:29,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139708325] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:53:29,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:53:29,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:53:29,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084828732] [2023-02-18 20:53:29,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:53:29,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:53:29,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:53:29,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:53:29,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:53:29,442 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:53:29,588 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2023-02-18 20:53:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 20:53:29,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-18 20:53:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:53:29,589 INFO L225 Difference]: With dead ends: 152 [2023-02-18 20:53:29,589 INFO L226 Difference]: Without dead ends: 152 [2023-02-18 20:53:29,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 20:53:29,590 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 116 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:53:29,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 240 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:53:29,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-18 20:53:29,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 111. [2023-02-18 20:53:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 85 states have (on average 1.5176470588235293) internal successors, (129), 110 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:29,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2023-02-18 20:53:29,596 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 17 [2023-02-18 20:53:29,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:53:29,596 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2023-02-18 20:53:29,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:29,596 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2023-02-18 20:53:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 20:53:29,597 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:53:29,597 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:53:29,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 20:53:29,597 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-18 20:53:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:53:29,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1332204645, now seen corresponding path program 1 times [2023-02-18 20:53:29,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:53:29,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766064879] [2023-02-18 20:53:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:53:29,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:53:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:53:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:53:29,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:53:29,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766064879] [2023-02-18 20:53:29,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766064879] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:53:29,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:53:29,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:53:29,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271744667] [2023-02-18 20:53:29,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:53:29,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:53:29,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:53:29,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:53:29,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:53:29,749 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:29,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:53:29,911 INFO L93 Difference]: Finished difference Result 155 states and 176 transitions. [2023-02-18 20:53:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 20:53:29,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-18 20:53:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:53:29,913 INFO L225 Difference]: With dead ends: 155 [2023-02-18 20:53:29,913 INFO L226 Difference]: Without dead ends: 155 [2023-02-18 20:53:29,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-18 20:53:29,914 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 80 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:53:29,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 307 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:53:29,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-02-18 20:53:29,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 95. [2023-02-18 20:53:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 72 states have (on average 1.4861111111111112) internal successors, (107), 94 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2023-02-18 20:53:29,918 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 17 [2023-02-18 20:53:29,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:53:29,918 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2023-02-18 20:53:29,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:29,918 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2023-02-18 20:53:29,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 20:53:29,919 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:53:29,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:53:29,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 20:53:29,919 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-18 20:53:29,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:53:29,919 INFO L85 PathProgramCache]: Analyzing trace with hash -808483032, now seen corresponding path program 1 times [2023-02-18 20:53:29,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:53:29,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904542063] [2023-02-18 20:53:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:53:29,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:53:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:53:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:53:30,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:53:30,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904542063] [2023-02-18 20:53:30,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904542063] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:53:30,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:53:30,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 20:53:30,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213082457] [2023-02-18 20:53:30,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:53:30,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 20:53:30,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:53:30,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 20:53:30,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-18 20:53:30,046 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:30,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:53:30,171 INFO L93 Difference]: Finished difference Result 202 states and 221 transitions. [2023-02-18 20:53:30,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 20:53:30,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 20:53:30,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:53:30,173 INFO L225 Difference]: With dead ends: 202 [2023-02-18 20:53:30,173 INFO L226 Difference]: Without dead ends: 202 [2023-02-18 20:53:30,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 20:53:30,175 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 147 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:53:30,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 236 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:53:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-02-18 20:53:30,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 106. [2023-02-18 20:53:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 83 states have (on average 1.4698795180722892) internal successors, (122), 105 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2023-02-18 20:53:30,193 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 18 [2023-02-18 20:53:30,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:53:30,193 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2023-02-18 20:53:30,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:30,194 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2023-02-18 20:53:30,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 20:53:30,194 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:53:30,194 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] [2023-02-18 20:53:30,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 20:53:30,195 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-18 20:53:30,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:53:30,195 INFO L85 PathProgramCache]: Analyzing trace with hash 389256394, now seen corresponding path program 1 times [2023-02-18 20:53:30,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:53:30,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952222147] [2023-02-18 20:53:30,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:53:30,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:53:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:53:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:53:30,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:53:30,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952222147] [2023-02-18 20:53:30,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952222147] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:53:30,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:53:30,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 20:53:30,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451865312] [2023-02-18 20:53:30,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:53:30,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 20:53:30,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:53:30,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 20:53:30,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 20:53:30,276 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:53:30,405 INFO L93 Difference]: Finished difference Result 199 states and 216 transitions. [2023-02-18 20:53:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 20:53:30,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 20:53:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:53:30,407 INFO L225 Difference]: With dead ends: 199 [2023-02-18 20:53:30,407 INFO L226 Difference]: Without dead ends: 199 [2023-02-18 20:53:30,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 20:53:30,407 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 195 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:53:30,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 190 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:53:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-02-18 20:53:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 110. [2023-02-18 20:53:30,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 87 states have (on average 1.4597701149425288) internal successors, (127), 109 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 127 transitions. [2023-02-18 20:53:30,410 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 127 transitions. Word has length 20 [2023-02-18 20:53:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:53:30,411 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 127 transitions. [2023-02-18 20:53:30,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:30,411 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 127 transitions. [2023-02-18 20:53:30,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 20:53:30,411 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:53:30,412 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] [2023-02-18 20:53:30,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 20:53:30,412 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-18 20:53:30,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:53:30,412 INFO L85 PathProgramCache]: Analyzing trace with hash 389308949, now seen corresponding path program 1 times [2023-02-18 20:53:30,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:53:30,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674666630] [2023-02-18 20:53:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:53:30,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:53:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:53:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:53:30,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:53:30,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674666630] [2023-02-18 20:53:30,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674666630] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:53:30,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:53:30,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 20:53:30,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235864124] [2023-02-18 20:53:30,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:53:30,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 20:53:30,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:53:30,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 20:53:30,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-18 20:53:30,496 INFO L87 Difference]: Start difference. First operand 110 states and 127 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:30,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:53:30,615 INFO L93 Difference]: Finished difference Result 183 states and 202 transitions. [2023-02-18 20:53:30,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 20:53:30,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 20:53:30,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:53:30,618 INFO L225 Difference]: With dead ends: 183 [2023-02-18 20:53:30,618 INFO L226 Difference]: Without dead ends: 183 [2023-02-18 20:53:30,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 20:53:30,620 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 144 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:53:30,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 234 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:53:30,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-02-18 20:53:30,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 110. [2023-02-18 20:53:30,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 87 states have (on average 1.4482758620689655) internal successors, (126), 109 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2023-02-18 20:53:30,629 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 20 [2023-02-18 20:53:30,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:53:30,629 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2023-02-18 20:53:30,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:30,630 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2023-02-18 20:53:30,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 20:53:30,630 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:53:30,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:53:30,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-18 20:53:30,631 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-18 20:53:30,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:53:30,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1064403471, now seen corresponding path program 1 times [2023-02-18 20:53:30,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:53:30,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880751020] [2023-02-18 20:53:30,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:53:30,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:53:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:53:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:53:30,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:53:30,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880751020] [2023-02-18 20:53:30,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880751020] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:53:30,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:53:30,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:53:30,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583830872] [2023-02-18 20:53:30,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:53:30,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:53:30,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:53:30,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:53:30,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:53:30,710 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:30,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:53:30,822 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2023-02-18 20:53:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 20:53:30,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 20:53:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:53:30,823 INFO L225 Difference]: With dead ends: 122 [2023-02-18 20:53:30,823 INFO L226 Difference]: Without dead ends: 122 [2023-02-18 20:53:30,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 20:53:30,827 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 109 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:53:30,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 196 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:53:30,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-18 20:53:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 108. [2023-02-18 20:53:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 87 states have (on average 1.4252873563218391) internal successors, (124), 107 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:30,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2023-02-18 20:53:30,830 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 20 [2023-02-18 20:53:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:53:30,831 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2023-02-18 20:53:30,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2023-02-18 20:53:30,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 20:53:30,834 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:53:30,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:53:30,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-18 20:53:30,835 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-18 20:53:30,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:53:30,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1064403472, now seen corresponding path program 1 times [2023-02-18 20:53:30,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:53:30,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150334754] [2023-02-18 20:53:30,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:53:30,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:53:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:53:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:53:30,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:53:30,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150334754] [2023-02-18 20:53:30,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150334754] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:53:30,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:53:30,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:53:30,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812940250] [2023-02-18 20:53:30,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:53:30,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:53:30,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:53:30,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:53:30,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:53:30,937 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:53:31,061 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2023-02-18 20:53:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 20:53:31,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 20:53:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:53:31,061 INFO L225 Difference]: With dead ends: 120 [2023-02-18 20:53:31,061 INFO L226 Difference]: Without dead ends: 120 [2023-02-18 20:53:31,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-18 20:53:31,062 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 72 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:53:31,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 250 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:53:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-18 20:53:31,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2023-02-18 20:53:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 77 states have (on average 1.3896103896103895) internal successors, (107), 92 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2023-02-18 20:53:31,064 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 20 [2023-02-18 20:53:31,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:53:31,064 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2023-02-18 20:53:31,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2023-02-18 20:53:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 20:53:31,065 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:53:31,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:53:31,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-18 20:53:31,065 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-18 20:53:31,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:53:31,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2138921840, now seen corresponding path program 1 times [2023-02-18 20:53:31,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:53:31,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688686764] [2023-02-18 20:53:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:53:31,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:53:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:53:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:53:31,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:53:31,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688686764] [2023-02-18 20:53:31,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688686764] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:53:31,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:53:31,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:53:31,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128526984] [2023-02-18 20:53:31,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:53:31,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:53:31,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:53:31,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:53:31,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:53:31,096 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:53:31,153 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2023-02-18 20:53:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:53:31,153 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-18 20:53:31,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:53:31,154 INFO L225 Difference]: With dead ends: 113 [2023-02-18 20:53:31,154 INFO L226 Difference]: Without dead ends: 113 [2023-02-18 20:53:31,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:53:31,155 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 127 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:53:31,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 69 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:53:31,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-18 20:53:31,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2023-02-18 20:53:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 79 states have (on average 1.379746835443038) internal successors, (109), 94 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2023-02-18 20:53:31,158 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 24 [2023-02-18 20:53:31,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:53:31,159 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2023-02-18 20:53:31,159 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:31,159 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2023-02-18 20:53:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 20:53:31,160 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:53:31,160 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] [2023-02-18 20:53:31,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-18 20:53:31,161 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-18 20:53:31,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:53:31,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1785439949, now seen corresponding path program 1 times [2023-02-18 20:53:31,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:53:31,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56309052] [2023-02-18 20:53:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:53:31,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:53:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:53:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:53:31,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:53:31,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56309052] [2023-02-18 20:53:31,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56309052] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:53:31,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:53:31,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 20:53:31,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361700349] [2023-02-18 20:53:31,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:53:31,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 20:53:31,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:53:31,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 20:53:31,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:53:31,223 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:31,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:53:31,334 INFO L93 Difference]: Finished difference Result 128 states and 143 transitions. [2023-02-18 20:53:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 20:53:31,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-18 20:53:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:53:31,335 INFO L225 Difference]: With dead ends: 128 [2023-02-18 20:53:31,335 INFO L226 Difference]: Without dead ends: 124 [2023-02-18 20:53:31,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:53:31,336 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 73 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:53:31,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 163 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:53:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-18 20:53:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2023-02-18 20:53:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 82 states have (on average 1.3658536585365855) internal successors, (112), 97 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2023-02-18 20:53:31,337 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 26 [2023-02-18 20:53:31,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:53:31,338 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2023-02-18 20:53:31,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:31,338 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2023-02-18 20:53:31,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 20:53:31,338 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:53:31,338 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] [2023-02-18 20:53:31,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-18 20:53:31,338 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-18 20:53:31,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:53:31,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1628820970, now seen corresponding path program 1 times [2023-02-18 20:53:31,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:53:31,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300919191] [2023-02-18 20:53:31,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:53:31,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:53:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:53:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:53:31,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:53:31,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300919191] [2023-02-18 20:53:31,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300919191] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:53:31,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743645627] [2023-02-18 20:53:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:53:31,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:53:31,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:53:31,528 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) [2023-02-18 20:53:31,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 20:53:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:53:31,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-18 20:53:31,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:53:31,705 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 [2023-02-18 20:53:31,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:53:31,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-18 20:53:31,774 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 13 treesize of output 9 [2023-02-18 20:53:31,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:53:31,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-18 20:53:31,798 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 20 treesize of output 8 [2023-02-18 20:53:31,824 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 [2023-02-18 20:53:31,831 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 [2023-02-18 20:53:31,855 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 [2023-02-18 20:53:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:53:31,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:53:31,905 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_205 (Array Int Int))) (not (= 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_205) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2023-02-18 20:53:31,924 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_205 (Array Int Int))) (not (= 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~mem13#1.base| v_ArrVal_205) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2023-02-18 20:53:31,927 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_205 (Array Int Int))) (not (= 1 (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~p~0#1.offset|)) v_ArrVal_205) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2023-02-18 20:53:32,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:53:32,012 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 30 [2023-02-18 20:53:32,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:53:32,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2023-02-18 20:53:32,021 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:53:32,021 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 13 treesize of output 17 [2023-02-18 20:53:32,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-02-18 20:53:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-02-18 20:53:32,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743645627] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:53:32,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:53:32,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 29 [2023-02-18 20:53:32,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352713858] [2023-02-18 20:53:32,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:53:32,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 20:53:32,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:53:32,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 20:53:32,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=518, Unknown=8, NotChecked=150, Total=812 [2023-02-18 20:53:32,053 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:53:32,704 INFO L93 Difference]: Finished difference Result 221 states and 240 transitions. [2023-02-18 20:53:32,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 20:53:32,705 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 20:53:32,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:53:32,706 INFO L225 Difference]: With dead ends: 221 [2023-02-18 20:53:32,706 INFO L226 Difference]: Without dead ends: 221 [2023-02-18 20:53:32,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1328, Unknown=9, NotChecked=246, Total=1980 [2023-02-18 20:53:32,707 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 378 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 52 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 20:53:32,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 623 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 794 Invalid, 5 Unknown, 337 Unchecked, 0.5s Time] [2023-02-18 20:53:32,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-02-18 20:53:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 112. [2023-02-18 20:53:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 96 states have (on average 1.3333333333333333) internal successors, (128), 111 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2023-02-18 20:53:32,709 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 27 [2023-02-18 20:53:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:53:32,709 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2023-02-18 20:53:32,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:53:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2023-02-18 20:53:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 20:53:32,709 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:53:32,710 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] [2023-02-18 20:53:32,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 20:53:32,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 20:53:32,915 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-18 20:53:32,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:53:32,915 INFO L85 PathProgramCache]: Analyzing trace with hash 324037282, now seen corresponding path program 1 times [2023-02-18 20:53:32,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:53:32,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695134987] [2023-02-18 20:53:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:53:32,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:53:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:53:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:53:33,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:53:33,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695134987] [2023-02-18 20:53:33,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695134987] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:53:33,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473510898] [2023-02-18 20:53:33,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:53:33,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:53:33,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:53:33,161 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) [2023-02-18 20:53:33,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 20:53:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:53:33,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 20:53:33,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:53:33,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:53:33,241 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 39 [2023-02-18 20:53:33,257 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 13 treesize of output 9 [2023-02-18 20:53:33,305 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:53:33,305 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 68 treesize of output 76 [2023-02-18 20:53:33,308 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 52 treesize of output 32 [2023-02-18 20:53:33,326 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:53:33,327 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 76 [2023-02-18 20:53:33,329 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 72 treesize of output 44 [2023-02-18 20:53:33,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:53:33,371 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 79 [2023-02-18 20:53:33,376 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 20:53:33,376 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 32 [2023-02-18 20:53:33,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:53:33,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:53:33,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:53:33,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-02-18 20:53:33,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:53:33,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-02-18 20:53:33,544 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 13 treesize of output 9 [2023-02-18 20:53:33,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:53:33,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 21 select indices, 21 select index equivalence classes, 0 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 210 case distinctions, treesize of input 287 treesize of output 1919