./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0504.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/memsafety/test-0504.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 cddde357ab55a506b6049f3b60959cd723bf2cbfd36f7774fe3606d53024bbf3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 20:38:26,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 20:38:26,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 20:38:26,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 20:38:26,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 20:38:26,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 20:38:26,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 20:38:26,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 20:38:26,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 20:38:26,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 20:38:26,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 20:38:26,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 20:38:26,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 20:38:26,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 20:38:26,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 20:38:26,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 20:38:26,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 20:38:26,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 20:38:26,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 20:38:26,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 20:38:26,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 20:38:26,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 20:38:26,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 20:38:26,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 20:38:26,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 20:38:26,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 20:38:26,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 20:38:26,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 20:38:26,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 20:38:26,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 20:38:26,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 20:38:26,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 20:38:26,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 20:38:26,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 20:38:26,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 20:38:26,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 20:38:26,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 20:38:26,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 20:38:26,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 20:38:26,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 20:38:26,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 20:38:26,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 20:38:26,439 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 20:38:26,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 20:38:26,439 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 20:38:26,439 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 20:38:26,440 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 20:38:26,440 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 20:38:26,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 20:38:26,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 20:38:26,441 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 20:38:26,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 20:38:26,442 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 20:38:26,442 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 20:38:26,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 20:38:26,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 20:38:26,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 20:38:26,442 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 20:38:26,442 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 20:38:26,443 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 20:38:26,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 20:38:26,443 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 20:38:26,443 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 20:38:26,443 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 20:38:26,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 20:38:26,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 20:38:26,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 20:38:26,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 20:38:26,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 20:38:26,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 20:38:26,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 20:38:26,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 20:38:26,445 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 20:38:26,445 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 20:38:26,445 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 20:38:26,445 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 20:38:26,445 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cddde357ab55a506b6049f3b60959cd723bf2cbfd36f7774fe3606d53024bbf3 [2023-02-18 20:38:26,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 20:38:26,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 20:38:26,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 20:38:26,679 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 20:38:26,679 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 20:38:26,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0504.i [2023-02-18 20:38:27,663 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 20:38:27,872 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 20:38:27,872 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0504.i [2023-02-18 20:38:27,880 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2c3d20bd/6550c97395fd44c6b41a37709b5080cb/FLAGd261b8874 [2023-02-18 20:38:27,891 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2c3d20bd/6550c97395fd44c6b41a37709b5080cb [2023-02-18 20:38:27,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 20:38:27,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 20:38:27,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 20:38:27,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 20:38:27,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 20:38:27,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:38:27" (1/1) ... [2023-02-18 20:38:27,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11ad67f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:27, skipping insertion in model container [2023-02-18 20:38:27,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:38:27" (1/1) ... [2023-02-18 20:38:27,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 20:38:27,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 20:38:28,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 20:38:28,086 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 20:38:28,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 20:38:28,127 INFO L208 MainTranslator]: Completed translation [2023-02-18 20:38:28,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:28 WrapperNode [2023-02-18 20:38:28,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 20:38:28,128 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 20:38:28,129 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 20:38:28,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 20:38:28,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:28" (1/1) ... [2023-02-18 20:38:28,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:28" (1/1) ... [2023-02-18 20:38:28,155 INFO L138 Inliner]: procedures = 123, calls = 27, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 86 [2023-02-18 20:38:28,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 20:38:28,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 20:38:28,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 20:38:28,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 20:38:28,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:28" (1/1) ... [2023-02-18 20:38:28,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:28" (1/1) ... [2023-02-18 20:38:28,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:28" (1/1) ... [2023-02-18 20:38:28,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:28" (1/1) ... [2023-02-18 20:38:28,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:28" (1/1) ... [2023-02-18 20:38:28,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:28" (1/1) ... [2023-02-18 20:38:28,171 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:28" (1/1) ... [2023-02-18 20:38:28,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:28" (1/1) ... [2023-02-18 20:38:28,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 20:38:28,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 20:38:28,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 20:38:28,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 20:38:28,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:28" (1/1) ... [2023-02-18 20:38:28,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 20:38:28,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:28,230 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 20:38:28,302 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 20:38:28,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 20:38:28,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 20:38:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 20:38:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 20:38:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 20:38:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 20:38:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 20:38:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 20:38:28,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 20:38:28,411 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 20:38:28,413 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 20:38:28,584 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 20:38:28,589 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 20:38:28,589 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-18 20:38:28,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:38:28 BoogieIcfgContainer [2023-02-18 20:38:28,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 20:38:28,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 20:38:28,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 20:38:28,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 20:38:28,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 08:38:27" (1/3) ... [2023-02-18 20:38:28,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e20da8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:38:28, skipping insertion in model container [2023-02-18 20:38:28,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:28" (2/3) ... [2023-02-18 20:38:28,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e20da8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:38:28, skipping insertion in model container [2023-02-18 20:38:28,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:38:28" (3/3) ... [2023-02-18 20:38:28,596 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0504.i [2023-02-18 20:38:28,607 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 20:38:28,607 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2023-02-18 20:38:28,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 20:38:28,639 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;@13150b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 20:38:28,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-02-18 20:38:28,642 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 86 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 20:38:28,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-18 20:38:28,646 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:28,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-18 20:38:28,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:28,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:28,650 INFO L85 PathProgramCache]: Analyzing trace with hash 28780379, now seen corresponding path program 1 times [2023-02-18 20:38:28,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:28,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52218222] [2023-02-18 20:38:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:28,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:28,765 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 20:38:28,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:28,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52218222] [2023-02-18 20:38:28,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52218222] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:28,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:28,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:38:28,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443199436] [2023-02-18 20:38:28,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:28,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 20:38:28,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:28,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 20:38:28,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 20:38:28,804 INFO L87 Difference]: Start difference. First operand has 87 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 86 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:28,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:28,831 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2023-02-18 20:38:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 20:38:28,833 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-02-18 20:38:28,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:28,838 INFO L225 Difference]: With dead ends: 87 [2023-02-18 20:38:28,839 INFO L226 Difference]: Without dead ends: 85 [2023-02-18 20:38:28,840 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 20:38:28,842 INFO L413 NwaCegarLoop]: 91 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, 91 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 20:38:28,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:38:28,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-18 20:38:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-02-18 20:38:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 44 states have (on average 2.022727272727273) internal successors, (89), 84 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 20:38:28,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2023-02-18 20:38:28,877 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 5 [2023-02-18 20:38:28,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:28,878 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2023-02-18 20:38:28,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:28,878 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2023-02-18 20:38:28,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 20:38:28,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:28,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 20:38:28,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 20:38:28,879 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:28,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:28,880 INFO L85 PathProgramCache]: Analyzing trace with hash 889572104, now seen corresponding path program 1 times [2023-02-18 20:38:28,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:28,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828932865] [2023-02-18 20:38:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:28,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:28,930 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 20:38:28,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:28,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828932865] [2023-02-18 20:38:28,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828932865] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:28,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:28,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:38:28,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934660343] [2023-02-18 20:38:28,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:28,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 20:38:28,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:28,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 20:38:28,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:38:28,934 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:28,955 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2023-02-18 20:38:28,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:38:28,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-18 20:38:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:28,956 INFO L225 Difference]: With dead ends: 133 [2023-02-18 20:38:28,956 INFO L226 Difference]: Without dead ends: 133 [2023-02-18 20:38:28,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:38:28,958 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 49 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:28,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 165 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:38:28,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-18 20:38:28,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 109. [2023-02-18 20:38:28,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 108 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 20:38:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 139 transitions. [2023-02-18 20:38:28,966 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 139 transitions. Word has length 6 [2023-02-18 20:38:28,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:28,966 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 139 transitions. [2023-02-18 20:38:28,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 139 transitions. [2023-02-18 20:38:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 20:38:28,967 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:28,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 20:38:28,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 20:38:28,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:28,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:28,968 INFO L85 PathProgramCache]: Analyzing trace with hash 889571339, now seen corresponding path program 1 times [2023-02-18 20:38:28,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:28,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618404670] [2023-02-18 20:38:28,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:28,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:29,048 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 20:38:29,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:29,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618404670] [2023-02-18 20:38:29,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618404670] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:29,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:29,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:38:29,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125238820] [2023-02-18 20:38:29,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:29,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 20:38:29,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:29,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 20:38:29,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:38:29,056 INFO L87 Difference]: Start difference. First operand 109 states and 139 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:29,138 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2023-02-18 20:38:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:38:29,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-18 20:38:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:29,141 INFO L225 Difference]: With dead ends: 130 [2023-02-18 20:38:29,142 INFO L226 Difference]: Without dead ends: 130 [2023-02-18 20:38:29,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:38:29,144 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 74 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:29,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 64 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:29,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-18 20:38:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 101. [2023-02-18 20:38:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.8235294117647058) internal successors, (124), 100 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 20:38:29,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2023-02-18 20:38:29,178 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 6 [2023-02-18 20:38:29,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:29,178 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2023-02-18 20:38:29,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:29,178 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2023-02-18 20:38:29,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 20:38:29,178 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:29,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 20:38:29,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 20:38:29,179 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:29,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:29,179 INFO L85 PathProgramCache]: Analyzing trace with hash 889571340, now seen corresponding path program 1 times [2023-02-18 20:38:29,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:29,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429981152] [2023-02-18 20:38:29,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:29,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:29,280 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 20:38:29,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:29,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429981152] [2023-02-18 20:38:29,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429981152] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:29,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:29,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:38:29,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826566794] [2023-02-18 20:38:29,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:29,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 20:38:29,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:29,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 20:38:29,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:38:29,282 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:29,360 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2023-02-18 20:38:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:38:29,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-18 20:38:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:29,362 INFO L225 Difference]: With dead ends: 138 [2023-02-18 20:38:29,362 INFO L226 Difference]: Without dead ends: 138 [2023-02-18 20:38:29,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:38:29,363 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 47 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:29,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 102 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:29,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-18 20:38:29,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2023-02-18 20:38:29,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 73 states have (on average 1.6849315068493151) internal successors, (123), 100 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2023-02-18 20:38:29,376 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 6 [2023-02-18 20:38:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:29,376 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2023-02-18 20:38:29,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:29,377 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2023-02-18 20:38:29,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 20:38:29,377 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:29,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:29,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 20:38:29,378 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:29,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:29,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1806930847, now seen corresponding path program 1 times [2023-02-18 20:38:29,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:29,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365740077] [2023-02-18 20:38:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:29,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:29,396 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 20:38:29,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:29,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365740077] [2023-02-18 20:38:29,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365740077] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:29,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:29,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:38:29,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965097118] [2023-02-18 20:38:29,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:29,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 20:38:29,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:29,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 20:38:29,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:38:29,399 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:29,497 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2023-02-18 20:38:29,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:38:29,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 20:38:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:29,504 INFO L225 Difference]: With dead ends: 103 [2023-02-18 20:38:29,504 INFO L226 Difference]: Without dead ends: 100 [2023-02-18 20:38:29,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:38:29,507 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:29,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:29,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-18 20:38:29,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-18 20:38:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.6805555555555556) internal successors, (121), 99 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 20:38:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2023-02-18 20:38:29,524 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 7 [2023-02-18 20:38:29,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:29,528 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2023-02-18 20:38:29,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:29,529 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2023-02-18 20:38:29,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 20:38:29,529 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:29,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:29,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 20:38:29,530 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:29,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:29,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1857997403, now seen corresponding path program 1 times [2023-02-18 20:38:29,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:29,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458661481] [2023-02-18 20:38:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:29,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:29,717 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 20:38:29,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:29,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458661481] [2023-02-18 20:38:29,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458661481] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:29,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:29,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:38:29,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817951094] [2023-02-18 20:38:29,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:29,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:38:29,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:29,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:38:29,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:38:29,719 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:29,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:29,821 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2023-02-18 20:38:29,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 20:38:29,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 20:38:29,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:29,822 INFO L225 Difference]: With dead ends: 126 [2023-02-18 20:38:29,822 INFO L226 Difference]: Without dead ends: 126 [2023-02-18 20:38:29,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-18 20:38:29,826 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 144 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:29,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 68 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:29,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-18 20:38:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 92. [2023-02-18 20:38:29,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 67 states have (on average 1.5970149253731343) internal successors, (107), 91 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 20:38:29,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2023-02-18 20:38:29,843 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 15 [2023-02-18 20:38:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:29,843 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2023-02-18 20:38:29,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:29,844 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2023-02-18 20:38:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 20:38:29,844 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:29,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:29,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 20:38:29,845 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:29,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:29,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1763344638, now seen corresponding path program 1 times [2023-02-18 20:38:29,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:29,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531937224] [2023-02-18 20:38:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:29,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:29,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:29,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531937224] [2023-02-18 20:38:29,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531937224] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:29,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:29,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:38:29,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381336795] [2023-02-18 20:38:29,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:29,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 20:38:29,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:29,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 20:38:29,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:38:29,941 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:29,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:29,984 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2023-02-18 20:38:29,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:38:29,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 20:38:29,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:29,985 INFO L225 Difference]: With dead ends: 88 [2023-02-18 20:38:29,985 INFO L226 Difference]: Without dead ends: 88 [2023-02-18 20:38:29,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:38:29,987 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 14 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:29,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 84 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:38:29,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-18 20:38:30,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-02-18 20:38:30,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.4776119402985075) internal successors, (99), 87 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 20:38:30,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2023-02-18 20:38:30,004 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 16 [2023-02-18 20:38:30,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:30,005 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2023-02-18 20:38:30,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2023-02-18 20:38:30,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 20:38:30,006 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:30,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:30,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 20:38:30,007 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:30,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:30,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1763344639, now seen corresponding path program 1 times [2023-02-18 20:38:30,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:30,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644973134] [2023-02-18 20:38:30,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:30,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:30,105 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 20:38:30,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:30,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644973134] [2023-02-18 20:38:30,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644973134] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:30,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:30,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:38:30,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052781884] [2023-02-18 20:38:30,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:30,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 20:38:30,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:30,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 20:38:30,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:38:30,108 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:30,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:30,141 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2023-02-18 20:38:30,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:38:30,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 20:38:30,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:30,142 INFO L225 Difference]: With dead ends: 84 [2023-02-18 20:38:30,142 INFO L226 Difference]: Without dead ends: 84 [2023-02-18 20:38:30,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:38:30,143 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 10 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:30,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 89 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:38:30,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-18 20:38:30,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-02-18 20:38:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.3582089552238805) internal successors, (91), 83 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:30,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2023-02-18 20:38:30,149 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 16 [2023-02-18 20:38:30,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:30,149 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2023-02-18 20:38:30,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:30,150 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2023-02-18 20:38:30,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 20:38:30,155 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:30,155 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:30,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-18 20:38:30,155 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:30,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1967864768, now seen corresponding path program 1 times [2023-02-18 20:38:30,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:30,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030117814] [2023-02-18 20:38:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:30,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:30,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:30,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030117814] [2023-02-18 20:38:30,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030117814] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:30,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:30,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:38:30,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14122421] [2023-02-18 20:38:30,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:30,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:38:30,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:30,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:38:30,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:38:30,203 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:30,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:30,280 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2023-02-18 20:38:30,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 20:38:30,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 20:38:30,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:30,281 INFO L225 Difference]: With dead ends: 114 [2023-02-18 20:38:30,281 INFO L226 Difference]: Without dead ends: 114 [2023-02-18 20:38:30,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:38:30,283 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 83 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:30,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 84 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:30,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-18 20:38:30,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2023-02-18 20:38:30,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 85 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:30,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2023-02-18 20:38:30,285 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 18 [2023-02-18 20:38:30,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:30,285 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2023-02-18 20:38:30,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:30,285 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2023-02-18 20:38:30,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 20:38:30,286 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:30,286 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:30,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-18 20:38:30,286 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:30,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:30,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1967864767, now seen corresponding path program 1 times [2023-02-18 20:38:30,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:30,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353497229] [2023-02-18 20:38:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:30,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:30,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:30,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353497229] [2023-02-18 20:38:30,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353497229] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:30,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:30,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:38:30,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125747166] [2023-02-18 20:38:30,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:30,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:38:30,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:30,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:38:30,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:38:30,394 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:30,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:30,470 INFO L93 Difference]: Finished difference Result 153 states and 172 transitions. [2023-02-18 20:38:30,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:38:30,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 20:38:30,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:30,471 INFO L225 Difference]: With dead ends: 153 [2023-02-18 20:38:30,471 INFO L226 Difference]: Without dead ends: 153 [2023-02-18 20:38:30,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:38:30,472 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 72 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:30,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 118 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:30,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-18 20:38:30,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 109. [2023-02-18 20:38:30,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 92 states have (on average 1.3804347826086956) internal successors, (127), 108 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 20:38:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 20:38:30,476 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 18 [2023-02-18 20:38:30,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:30,476 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 20:38:30,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:30,476 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 20:38:30,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 20:38:30,477 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:30,477 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:30,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-18 20:38:30,477 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:30,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:30,478 INFO L85 PathProgramCache]: Analyzing trace with hash -874266265, now seen corresponding path program 1 times [2023-02-18 20:38:30,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:30,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902840299] [2023-02-18 20:38:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:30,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:30,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:30,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902840299] [2023-02-18 20:38:30,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902840299] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:30,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:30,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 20:38:30,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834110858] [2023-02-18 20:38:30,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:30,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:38:30,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:30,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:38:30,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:38:30,533 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:30,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:30,571 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2023-02-18 20:38:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:38:30,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 20:38:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:30,574 INFO L225 Difference]: With dead ends: 113 [2023-02-18 20:38:30,574 INFO L226 Difference]: Without dead ends: 113 [2023-02-18 20:38:30,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:38:30,575 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 89 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:30,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 108 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:38:30,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-18 20:38:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2023-02-18 20:38:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 105 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:30,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2023-02-18 20:38:30,580 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 19 [2023-02-18 20:38:30,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:30,581 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2023-02-18 20:38:30,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:30,581 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2023-02-18 20:38:30,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 20:38:30,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:30,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:30,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-18 20:38:30,583 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:30,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:30,583 INFO L85 PathProgramCache]: Analyzing trace with hash 55140128, now seen corresponding path program 1 times [2023-02-18 20:38:30,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:30,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246585711] [2023-02-18 20:38:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:30,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:30,750 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 20:38:30,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:30,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246585711] [2023-02-18 20:38:30,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246585711] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:30,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:30,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:38:30,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008444749] [2023-02-18 20:38:30,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:30,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:38:30,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:30,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:38:30,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:38:30,752 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:30,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:30,841 INFO L93 Difference]: Finished difference Result 170 states and 187 transitions. [2023-02-18 20:38:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 20:38:30,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 20:38:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:30,843 INFO L225 Difference]: With dead ends: 170 [2023-02-18 20:38:30,843 INFO L226 Difference]: Without dead ends: 170 [2023-02-18 20:38:30,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-18 20:38:30,843 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 45 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:30,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 183 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-18 20:38:30,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 120. [2023-02-18 20:38:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 119 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:38:30,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2023-02-18 20:38:30,846 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 19 [2023-02-18 20:38:30,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:30,846 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2023-02-18 20:38:30,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:30,847 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2023-02-18 20:38:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 20:38:30,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:30,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:30,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-18 20:38:30,850 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:30,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:30,850 INFO L85 PathProgramCache]: Analyzing trace with hash 55140129, now seen corresponding path program 1 times [2023-02-18 20:38:30,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:30,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658426124] [2023-02-18 20:38:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:30,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:31,157 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 20:38:31,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:31,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658426124] [2023-02-18 20:38:31,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658426124] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:31,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:31,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 20:38:31,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093615528] [2023-02-18 20:38:31,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:31,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 20:38:31,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:31,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 20:38:31,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-02-18 20:38:31,159 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:31,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:31,344 INFO L93 Difference]: Finished difference Result 184 states and 199 transitions. [2023-02-18 20:38:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 20:38:31,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 20:38:31,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:31,345 INFO L225 Difference]: With dead ends: 184 [2023-02-18 20:38:31,345 INFO L226 Difference]: Without dead ends: 184 [2023-02-18 20:38:31,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2023-02-18 20:38:31,346 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 177 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:31,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 199 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:38:31,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-02-18 20:38:31,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 120. [2023-02-18 20:38:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 103 states have (on average 1.2912621359223302) internal successors, (133), 119 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 133 transitions. [2023-02-18 20:38:31,348 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 133 transitions. Word has length 19 [2023-02-18 20:38:31,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:31,348 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 133 transitions. [2023-02-18 20:38:31,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 133 transitions. [2023-02-18 20:38:31,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 20:38:31,349 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:31,349 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:31,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-18 20:38:31,350 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:31,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:31,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1332429407, now seen corresponding path program 1 times [2023-02-18 20:38:31,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:31,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953071412] [2023-02-18 20:38:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:31,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 20:38:31,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:31,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953071412] [2023-02-18 20:38:31,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953071412] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:31,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:31,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:38:31,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748958309] [2023-02-18 20:38:31,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:31,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:38:31,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:31,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:38:31,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:38:31,378 INFO L87 Difference]: Start difference. First operand 120 states and 133 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:31,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:31,431 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2023-02-18 20:38:31,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 20:38:31,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 20:38:31,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:31,432 INFO L225 Difference]: With dead ends: 135 [2023-02-18 20:38:31,433 INFO L226 Difference]: Without dead ends: 135 [2023-02-18 20:38:31,433 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 20:38:31,433 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:31,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 98 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:38:31,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-18 20:38:31,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2023-02-18 20:38:31,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 107 states have (on average 1.2990654205607477) internal successors, (139), 122 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 20:38:31,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2023-02-18 20:38:31,435 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 20 [2023-02-18 20:38:31,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:31,436 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2023-02-18 20:38:31,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:31,436 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2023-02-18 20:38:31,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 20:38:31,436 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:31,436 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:31,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-18 20:38:31,437 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:31,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:31,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1332429406, now seen corresponding path program 1 times [2023-02-18 20:38:31,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:31,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480241549] [2023-02-18 20:38:31,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:31,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:31,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:31,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480241549] [2023-02-18 20:38:31,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480241549] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:31,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:31,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 20:38:31,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17368437] [2023-02-18 20:38:31,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:31,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 20:38:31,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:31,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 20:38:31,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:38:31,501 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:31,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:31,601 INFO L93 Difference]: Finished difference Result 194 states and 217 transitions. [2023-02-18 20:38:31,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 20:38:31,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 20:38:31,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:31,602 INFO L225 Difference]: With dead ends: 194 [2023-02-18 20:38:31,602 INFO L226 Difference]: Without dead ends: 194 [2023-02-18 20:38:31,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:38:31,603 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 111 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:31,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 132 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:31,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-02-18 20:38:31,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 135. [2023-02-18 20:38:31,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 119 states have (on average 1.3277310924369747) internal successors, (158), 134 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:31,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 158 transitions. [2023-02-18 20:38:31,606 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 158 transitions. Word has length 20 [2023-02-18 20:38:31,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:31,606 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 158 transitions. [2023-02-18 20:38:31,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:31,606 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 158 transitions. [2023-02-18 20:38:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 20:38:31,607 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:31,607 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:31,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-18 20:38:31,607 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:31,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:31,607 INFO L85 PathProgramCache]: Analyzing trace with hash -316635569, now seen corresponding path program 1 times [2023-02-18 20:38:31,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:31,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477262558] [2023-02-18 20:38:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:31,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:31,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:31,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477262558] [2023-02-18 20:38:31,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477262558] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:31,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:31,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 20:38:31,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359693852] [2023-02-18 20:38:31,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:31,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 20:38:31,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:31,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 20:38:31,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:38:31,720 INFO L87 Difference]: Start difference. First operand 135 states and 158 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 20:38:31,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:31,855 INFO L93 Difference]: Finished difference Result 200 states and 231 transitions. [2023-02-18 20:38:31,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 20:38:31,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2023-02-18 20:38:31,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:31,856 INFO L225 Difference]: With dead ends: 200 [2023-02-18 20:38:31,856 INFO L226 Difference]: Without dead ends: 200 [2023-02-18 20:38:31,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-02-18 20:38:31,856 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 87 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:31,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 225 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-18 20:38:31,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2023-02-18 20:38:31,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 128 states have (on average 1.328125) internal successors, (170), 143 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 20:38:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2023-02-18 20:38:31,859 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 23 [2023-02-18 20:38:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:31,859 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2023-02-18 20:38:31,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 20:38:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2023-02-18 20:38:31,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 20:38:31,860 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:31,860 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:31,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-18 20:38:31,860 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:31,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:31,861 INFO L85 PathProgramCache]: Analyzing trace with hash -316635568, now seen corresponding path program 1 times [2023-02-18 20:38:31,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:31,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512090920] [2023-02-18 20:38:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:31,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:31,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:31,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512090920] [2023-02-18 20:38:31,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512090920] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:31,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:31,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 20:38:31,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889129823] [2023-02-18 20:38:31,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:31,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 20:38:31,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:31,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 20:38:31,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 20:38:31,994 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 20:38:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:32,102 INFO L93 Difference]: Finished difference Result 195 states and 225 transitions. [2023-02-18 20:38:32,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 20:38:32,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2023-02-18 20:38:32,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:32,103 INFO L225 Difference]: With dead ends: 195 [2023-02-18 20:38:32,103 INFO L226 Difference]: Without dead ends: 195 [2023-02-18 20:38:32,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-02-18 20:38:32,104 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 95 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:32,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 236 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-02-18 20:38:32,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2023-02-18 20:38:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 127 states have (on average 1.31496062992126) internal successors, (167), 142 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 20:38:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 167 transitions. [2023-02-18 20:38:32,106 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 167 transitions. Word has length 23 [2023-02-18 20:38:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:32,106 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 167 transitions. [2023-02-18 20:38:32,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 20:38:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 167 transitions. [2023-02-18 20:38:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 20:38:32,107 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:32,107 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:32,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-18 20:38:32,107 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:32,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1225769432, now seen corresponding path program 1 times [2023-02-18 20:38:32,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:32,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593490159] [2023-02-18 20:38:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:32,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:32,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:32,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593490159] [2023-02-18 20:38:32,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593490159] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:32,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:32,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 20:38:32,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538617362] [2023-02-18 20:38:32,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:32,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 20:38:32,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:32,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 20:38:32,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:38:32,162 INFO L87 Difference]: Start difference. First operand 143 states and 167 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:32,230 INFO L93 Difference]: Finished difference Result 167 states and 191 transitions. [2023-02-18 20:38:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 20:38:32,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-18 20:38:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:32,231 INFO L225 Difference]: With dead ends: 167 [2023-02-18 20:38:32,231 INFO L226 Difference]: Without dead ends: 167 [2023-02-18 20:38:32,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:38:32,231 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 113 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:32,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 148 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:32,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-18 20:38:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 157. [2023-02-18 20:38:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 141 states have (on average 1.3546099290780143) internal successors, (191), 156 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 20:38:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 191 transitions. [2023-02-18 20:38:32,234 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 191 transitions. Word has length 24 [2023-02-18 20:38:32,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:32,234 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 191 transitions. [2023-02-18 20:38:32,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:32,234 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 191 transitions. [2023-02-18 20:38:32,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 20:38:32,235 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:32,235 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 20:38:32,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-18 20:38:32,235 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:32,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:32,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1085033438, now seen corresponding path program 1 times [2023-02-18 20:38:32,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:32,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939190164] [2023-02-18 20:38:32,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:32,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:32,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:32,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939190164] [2023-02-18 20:38:32,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939190164] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:38:32,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396131903] [2023-02-18 20:38:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:32,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:32,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:32,422 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 20:38:32,444 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 20:38:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:32,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-18 20:38:32,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:32,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-18 20:38:32,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-18 20:38:32,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-18 20:38:32,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-18 20:38:32,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:38:32,611 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 20:38:32,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:38:32,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:38:32,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2023-02-18 20:38:32,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:32,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2023-02-18 20:38:32,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-18 20:38:32,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-18 20:38:32,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2023-02-18 20:38:32,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2023-02-18 20:38:32,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:32,664 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 19 treesize of output 10 [2023-02-18 20:38:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:32,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:38:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:32,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396131903] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:38:32,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:38:32,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 11 [2023-02-18 20:38:32,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587849790] [2023-02-18 20:38:32,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:38:32,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 20:38:32,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:32,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 20:38:32,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-18 20:38:32,693 INFO L87 Difference]: Start difference. First operand 157 states and 191 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 20:38:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:32,850 INFO L93 Difference]: Finished difference Result 186 states and 218 transitions. [2023-02-18 20:38:32,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 20:38:32,851 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 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 20:38:32,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:32,851 INFO L225 Difference]: With dead ends: 186 [2023-02-18 20:38:32,851 INFO L226 Difference]: Without dead ends: 186 [2023-02-18 20:38:32,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2023-02-18 20:38:32,852 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 163 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:32,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 349 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:32,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-02-18 20:38:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2023-02-18 20:38:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 145 states have (on average 1.3448275862068966) internal successors, (195), 160 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 20:38:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 195 transitions. [2023-02-18 20:38:32,855 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 195 transitions. Word has length 27 [2023-02-18 20:38:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:32,855 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 195 transitions. [2023-02-18 20:38:32,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 20:38:32,855 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 195 transitions. [2023-02-18 20:38:32,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 20:38:32,856 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:32,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-18 20:38:32,861 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 20:38:33,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:33,057 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:33,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:33,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2078846143, now seen corresponding path program 1 times [2023-02-18 20:38:33,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:33,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149684509] [2023-02-18 20:38:33,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:33,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:33,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:33,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149684509] [2023-02-18 20:38:33,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149684509] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:38:33,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551616084] [2023-02-18 20:38:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:33,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:33,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:33,124 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 20:38:33,127 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 20:38:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:33,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 20:38:33,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:33,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:38:33,240 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:33,240 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 20:38:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:33,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:38:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:33,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551616084] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:38:33,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:38:33,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2023-02-18 20:38:33,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994916545] [2023-02-18 20:38:33,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:38:33,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 20:38:33,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:33,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 20:38:33,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-18 20:38:33,292 INFO L87 Difference]: Start difference. First operand 161 states and 195 transitions. Second operand has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 20:38:33,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:33,372 INFO L93 Difference]: Finished difference Result 181 states and 214 transitions. [2023-02-18 20:38:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:38:33,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 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 20:38:33,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:33,373 INFO L225 Difference]: With dead ends: 181 [2023-02-18 20:38:33,374 INFO L226 Difference]: Without dead ends: 181 [2023-02-18 20:38:33,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:38:33,374 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 118 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:33,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 141 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:33,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-18 20:38:33,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 160. [2023-02-18 20:38:33,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 145 states have (on average 1.3310344827586207) internal successors, (193), 159 states have internal predecessors, (193), 0 states have call successors, (0), 0 states 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 20:38:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 193 transitions. [2023-02-18 20:38:33,377 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 193 transitions. Word has length 27 [2023-02-18 20:38:33,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:33,377 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 193 transitions. [2023-02-18 20:38:33,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 20:38:33,378 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 193 transitions. [2023-02-18 20:38:33,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 20:38:33,378 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:33,378 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-18 20:38:33,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 20:38:33,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-02-18 20:38:33,600 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:33,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2078846144, now seen corresponding path program 1 times [2023-02-18 20:38:33,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:33,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320627077] [2023-02-18 20:38:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:33,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:33,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:33,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320627077] [2023-02-18 20:38:33,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320627077] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:38:33,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263818415] [2023-02-18 20:38:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:33,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:33,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:33,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:38:33,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 20:38:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:33,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 20:38:33,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:33,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:38:33,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:38:33,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:38:33,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 20:38:33,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:33,880 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 20:38:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:33,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:38:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:33,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263818415] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:38:33,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:38:33,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-18 20:38:33,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774708354] [2023-02-18 20:38:33,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:38:33,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 20:38:33,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:33,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 20:38:33,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-02-18 20:38:33,943 INFO L87 Difference]: Start difference. First operand 160 states and 193 transitions. Second operand has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 20:38:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:34,055 INFO L93 Difference]: Finished difference Result 180 states and 212 transitions. [2023-02-18 20:38:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 20:38:34,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 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 20:38:34,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:34,056 INFO L225 Difference]: With dead ends: 180 [2023-02-18 20:38:34,056 INFO L226 Difference]: Without dead ends: 180 [2023-02-18 20:38:34,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-02-18 20:38:34,057 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 305 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:34,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 131 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-02-18 20:38:34,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 159. [2023-02-18 20:38:34,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 145 states have (on average 1.3172413793103448) internal successors, (191), 158 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 20:38:34,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 191 transitions. [2023-02-18 20:38:34,059 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 191 transitions. Word has length 27 [2023-02-18 20:38:34,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:34,059 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 191 transitions. [2023-02-18 20:38:34,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 20:38:34,059 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 191 transitions. [2023-02-18 20:38:34,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 20:38:34,059 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:34,060 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:34,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 20:38:34,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:34,266 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:34,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:34,266 INFO L85 PathProgramCache]: Analyzing trace with hash 723701189, now seen corresponding path program 1 times [2023-02-18 20:38:34,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:34,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457007563] [2023-02-18 20:38:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:34,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:34,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:34,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457007563] [2023-02-18 20:38:34,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457007563] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:38:34,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305609859] [2023-02-18 20:38:34,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:34,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:34,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:34,326 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:38:34,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 20:38:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:34,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 20:38:34,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:34,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2023-02-18 20:38:34,435 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~x~1#1.base| Int)) (let ((.cse0 (select |c_#valid| |ULTIMATE.start_main_~x~1#1.base|))) (and (= 0 (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~x~1#1.base|)) (= .cse0 0) (= (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~x~1#1.base| .cse0) |c_#valid|)))) is different from true [2023-02-18 20:38:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-02-18 20:38:34,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:38:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:34,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305609859] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:38:34,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:38:34,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2023-02-18 20:38:34,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859361130] [2023-02-18 20:38:34,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:38:34,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 20:38:34,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:34,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 20:38:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=31, Unknown=1, NotChecked=10, Total=56 [2023-02-18 20:38:34,468 INFO L87 Difference]: Start difference. First operand 159 states and 191 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:34,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:34,575 INFO L93 Difference]: Finished difference Result 161 states and 192 transitions. [2023-02-18 20:38:34,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 20:38:34,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-18 20:38:34,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:34,576 INFO L225 Difference]: With dead ends: 161 [2023-02-18 20:38:34,576 INFO L226 Difference]: Without dead ends: 149 [2023-02-18 20:38:34,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=77, Unknown=1, NotChecked=18, Total=132 [2023-02-18 20:38:34,577 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 17 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:34,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 156 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2023-02-18 20:38:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-18 20:38:34,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-02-18 20:38:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 135 states have (on average 1.3333333333333333) internal successors, (180), 148 states have internal predecessors, (180), 0 states have call successors, (0), 0 states 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 20:38:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 180 transitions. [2023-02-18 20:38:34,579 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 180 transitions. Word has length 28 [2023-02-18 20:38:34,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:34,579 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 180 transitions. [2023-02-18 20:38:34,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:34,579 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 180 transitions. [2023-02-18 20:38:34,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 20:38:34,579 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:34,579 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:34,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 20:38:34,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:34,785 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:34,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:34,785 INFO L85 PathProgramCache]: Analyzing trace with hash -28804244, now seen corresponding path program 1 times [2023-02-18 20:38:34,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:34,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024441102] [2023-02-18 20:38:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:34,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:35,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:35,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024441102] [2023-02-18 20:38:35,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024441102] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:38:35,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243695356] [2023-02-18 20:38:35,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:35,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:35,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:35,012 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:38:35,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 20:38:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:35,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 20:38:35,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:35,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:38:35,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:38:35,156 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 20:38:35,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:38:35,173 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 20:38:35,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:38:35,178 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 20:38:35,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:35,182 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 20:38:35,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-18 20:38:35,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-02-18 20:38:35,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-18 20:38:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:35,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:38:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:35,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243695356] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:38:35,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:38:35,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 4] total 18 [2023-02-18 20:38:35,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691911817] [2023-02-18 20:38:35,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:38:35,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 20:38:35,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:35,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 20:38:35,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-02-18 20:38:35,284 INFO L87 Difference]: Start difference. First operand 149 states and 180 transitions. Second operand has 19 states, 18 states have (on average 4.166666666666667) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:35,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:35,656 INFO L93 Difference]: Finished difference Result 269 states and 318 transitions. [2023-02-18 20:38:35,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 20:38:35,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.166666666666667) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 20:38:35,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:35,657 INFO L225 Difference]: With dead ends: 269 [2023-02-18 20:38:35,657 INFO L226 Difference]: Without dead ends: 269 [2023-02-18 20:38:35,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2023-02-18 20:38:35,658 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 346 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:35,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 482 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 20:38:35,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-02-18 20:38:35,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2023-02-18 20:38:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 152 states have (on average 1.3092105263157894) internal successors, (199), 165 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 20:38:35,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 199 transitions. [2023-02-18 20:38:35,660 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 199 transitions. Word has length 31 [2023-02-18 20:38:35,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:35,661 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 199 transitions. [2023-02-18 20:38:35,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.166666666666667) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:38:35,661 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 199 transitions. [2023-02-18 20:38:35,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 20:38:35,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:35,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:35,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 20:38:35,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-18 20:38:35,867 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-18 20:38:35,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:35,868 INFO L85 PathProgramCache]: Analyzing trace with hash 36474197, now seen corresponding path program 1 times [2023-02-18 20:38:35,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:35,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701475986] [2023-02-18 20:38:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:35,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:36,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:36,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701475986] [2023-02-18 20:38:36,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701475986] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:38:36,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41810172] [2023-02-18 20:38:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:36,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:36,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:36,002 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:38:36,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 20:38:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:36,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 20:38:36,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:36,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:38:36,135 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 20:38:36,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:36,138 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 21 treesize of output 59 [2023-02-18 20:38:36,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:36,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 193 [2023-02-18 20:42:37,126 INFO L217 Elim1Store]: Index analysis took 550 ms