./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0232-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0232-2.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 d7d99b84861b7e58e44833cf97c5fb5fa14d1ad6f1b87526d3144a9659451e97 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 02:50:46,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 02:50:46,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 02:50:46,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 02:50:46,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 02:50:46,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 02:50:46,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 02:50:46,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 02:50:46,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 02:50:46,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 02:50:46,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 02:50:46,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 02:50:46,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 02:50:46,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 02:50:46,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 02:50:46,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 02:50:46,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 02:50:46,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 02:50:46,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 02:50:46,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 02:50:46,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 02:50:46,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 02:50:46,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 02:50:46,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 02:50:46,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 02:50:46,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 02:50:46,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 02:50:46,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 02:50:46,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 02:50:46,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 02:50:46,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 02:50:46,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 02:50:46,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 02:50:46,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 02:50:46,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 02:50:46,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 02:50:46,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 02:50:46,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 02:50:46,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 02:50:46,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 02:50:46,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 02:50:46,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 02:50:46,341 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 02:50:46,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 02:50:46,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 02:50:46,342 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 02:50:46,342 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 02:50:46,343 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 02:50:46,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 02:50:46,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 02:50:46,343 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 02:50:46,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 02:50:46,344 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 02:50:46,344 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 02:50:46,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 02:50:46,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 02:50:46,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 02:50:46,345 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 02:50:46,345 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 02:50:46,345 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 02:50:46,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 02:50:46,345 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 02:50:46,346 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 02:50:46,346 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 02:50:46,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 02:50:46,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 02:50:46,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 02:50:46,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:50:46,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 02:50:46,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 02:50:46,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 02:50:46,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 02:50:46,347 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 02:50:46,347 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 02:50:46,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 02:50:46,348 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 02:50:46,348 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7d99b84861b7e58e44833cf97c5fb5fa14d1ad6f1b87526d3144a9659451e97 [2023-02-17 02:50:46,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 02:50:46,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 02:50:46,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 02:50:46,576 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 02:50:46,576 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 02:50:46,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0232-2.i [2023-02-17 02:50:47,703 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 02:50:47,946 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 02:50:47,947 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0232-2.i [2023-02-17 02:50:47,955 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/219bf2c20/6ccaf2ce17e34c82b715bc2c7f28c9be/FLAG96c66e111 [2023-02-17 02:50:47,972 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/219bf2c20/6ccaf2ce17e34c82b715bc2c7f28c9be [2023-02-17 02:50:47,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 02:50:47,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 02:50:47,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 02:50:47,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 02:50:47,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 02:50:47,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:50:47" (1/1) ... [2023-02-17 02:50:47,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e91d011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:50:47, skipping insertion in model container [2023-02-17 02:50:47,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:50:47" (1/1) ... [2023-02-17 02:50:47,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 02:50:48,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 02:50:48,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:50:48,291 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 02:50:48,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:50:48,348 INFO L208 MainTranslator]: Completed translation [2023-02-17 02:50:48,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:50:48 WrapperNode [2023-02-17 02:50:48,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 02:50:48,351 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 02:50:48,351 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 02:50:48,351 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 02:50:48,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:50:48" (1/1) ... [2023-02-17 02:50:48,381 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:50:48" (1/1) ... [2023-02-17 02:50:48,402 INFO L138 Inliner]: procedures = 126, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2023-02-17 02:50:48,402 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 02:50:48,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 02:50:48,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 02:50:48,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 02:50:48,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:50:48" (1/1) ... [2023-02-17 02:50:48,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:50:48" (1/1) ... [2023-02-17 02:50:48,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:50:48" (1/1) ... [2023-02-17 02:50:48,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:50:48" (1/1) ... [2023-02-17 02:50:48,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:50:48" (1/1) ... [2023-02-17 02:50:48,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:50:48" (1/1) ... [2023-02-17 02:50:48,437 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:50:48" (1/1) ... [2023-02-17 02:50:48,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:50:48" (1/1) ... [2023-02-17 02:50:48,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 02:50:48,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 02:50:48,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 02:50:48,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 02:50:48,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:50:48" (1/1) ... [2023-02-17 02:50:48,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:50:48,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:50:48,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 02:50:48,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 02:50:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 02:50:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 02:50:48,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 02:50:48,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 02:50:48,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 02:50:48,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 02:50:48,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 02:50:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 02:50:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 02:50:48,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 02:50:48,647 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 02:50:48,649 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 02:50:48,908 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 02:50:48,919 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 02:50:48,920 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 02:50:48,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:50:48 BoogieIcfgContainer [2023-02-17 02:50:48,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 02:50:48,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 02:50:48,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 02:50:48,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 02:50:48,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 02:50:47" (1/3) ... [2023-02-17 02:50:48,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7237a412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:50:48, skipping insertion in model container [2023-02-17 02:50:48,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:50:48" (2/3) ... [2023-02-17 02:50:48,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7237a412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:50:48, skipping insertion in model container [2023-02-17 02:50:48,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:50:48" (3/3) ... [2023-02-17 02:50:48,928 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0232-2.i [2023-02-17 02:50:48,939 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 02:50:48,940 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2023-02-17 02:50:48,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 02:50:48,984 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;@74a985ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 02:50:48,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-02-17 02:50:48,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 45 states have (on average 2.2) internal successors, (99), 93 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) [2023-02-17 02:50:48,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-17 02:50:48,997 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:50:48,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-17 02:50:48,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 02:50:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:50:49,003 INFO L85 PathProgramCache]: Analyzing trace with hash 925637, now seen corresponding path program 1 times [2023-02-17 02:50:49,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:50:49,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419508708] [2023-02-17 02:50:49,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:49,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:50:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:50:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:50:49,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:50:49,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419508708] [2023-02-17 02:50:49,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419508708] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:50:49,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:50:49,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 02:50:49,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002889899] [2023-02-17 02:50:49,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:50:49,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 02:50:49,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:50:49,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 02:50:49,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 02:50:49,272 INFO L87 Difference]: Start difference. First operand has 94 states, 45 states have (on average 2.2) internal successors, (99), 93 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) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:50:49,420 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2023-02-17 02:50:49,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 02:50:49,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-02-17 02:50:49,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:50:49,435 INFO L225 Difference]: With dead ends: 105 [2023-02-17 02:50:49,436 INFO L226 Difference]: Without dead ends: 103 [2023-02-17 02:50:49,437 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 [2023-02-17 02:50:49,439 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 150 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:50:49,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 65 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:50:49,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-17 02:50:49,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2023-02-17 02:50:49,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 83 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:49,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2023-02-17 02:50:49,462 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 4 [2023-02-17 02:50:49,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:50:49,462 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2023-02-17 02:50:49,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:49,462 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2023-02-17 02:50:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-17 02:50:49,463 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:50:49,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-17 02:50:49,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 02:50:49,463 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 02:50:49,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:50:49,464 INFO L85 PathProgramCache]: Analyzing trace with hash 925638, now seen corresponding path program 1 times [2023-02-17 02:50:49,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:50:49,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895321094] [2023-02-17 02:50:49,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:49,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:50:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:50:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:50:49,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:50:49,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895321094] [2023-02-17 02:50:49,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895321094] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:50:49,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:50:49,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 02:50:49,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305840627] [2023-02-17 02:50:49,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:50:49,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 02:50:49,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:50:49,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 02:50:49,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 02:50:49,572 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:50:49,720 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2023-02-17 02:50:49,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 02:50:49,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-02-17 02:50:49,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:50:49,722 INFO L225 Difference]: With dead ends: 95 [2023-02-17 02:50:49,722 INFO L226 Difference]: Without dead ends: 95 [2023-02-17 02:50:49,723 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 [2023-02-17 02:50:49,724 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 150 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:50:49,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 45 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:50:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-17 02:50:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2023-02-17 02:50:49,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 50 states have (on average 1.82) internal successors, (91), 84 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) [2023-02-17 02:50:49,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2023-02-17 02:50:49,733 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 4 [2023-02-17 02:50:49,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:50:49,734 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2023-02-17 02:50:49,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2023-02-17 02:50:49,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-17 02:50:49,735 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:50:49,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-17 02:50:49,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 02:50:49,735 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 02:50:49,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:50:49,736 INFO L85 PathProgramCache]: Analyzing trace with hash 28694727, now seen corresponding path program 1 times [2023-02-17 02:50:49,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:50:49,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468288446] [2023-02-17 02:50:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:49,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:50:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:50:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:50:49,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:50:49,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468288446] [2023-02-17 02:50:49,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468288446] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:50:49,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:50:49,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:50:49,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725151924] [2023-02-17 02:50:49,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:50:49,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:50:49,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:50:49,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:50:49,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:50:49,777 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:50:49,852 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2023-02-17 02:50:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:50:49,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-02-17 02:50:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:50:49,853 INFO L225 Difference]: With dead ends: 91 [2023-02-17 02:50:49,855 INFO L226 Difference]: Without dead ends: 91 [2023-02-17 02:50:49,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:50:49,856 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 51 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:50:49,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 66 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:50:49,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-17 02:50:49,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2023-02-17 02:50:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 50 states have (on average 1.74) internal successors, (87), 80 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2023-02-17 02:50:49,866 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 5 [2023-02-17 02:50:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:50:49,866 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2023-02-17 02:50:49,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2023-02-17 02:50:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-17 02:50:49,867 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:50:49,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-17 02:50:49,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 02:50:49,867 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 02:50:49,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:50:49,868 INFO L85 PathProgramCache]: Analyzing trace with hash 28694728, now seen corresponding path program 1 times [2023-02-17 02:50:49,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:50:49,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144103761] [2023-02-17 02:50:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:49,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:50:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:50:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:50:49,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:50:49,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144103761] [2023-02-17 02:50:49,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144103761] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:50:49,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:50:49,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:50:49,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112720993] [2023-02-17 02:50:49,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:50:49,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:50:49,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:50:49,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:50:49,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:50:49,941 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:49,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:50:49,982 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2023-02-17 02:50:49,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:50:49,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-02-17 02:50:49,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:50:49,983 INFO L225 Difference]: With dead ends: 78 [2023-02-17 02:50:49,983 INFO L226 Difference]: Without dead ends: 78 [2023-02-17 02:50:49,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:50:49,984 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:50:49,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 44 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:50:49,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-17 02:50:49,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2023-02-17 02:50:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.66) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:49,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2023-02-17 02:50:49,988 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 5 [2023-02-17 02:50:49,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:50:49,989 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2023-02-17 02:50:49,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:49,989 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2023-02-17 02:50:49,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 02:50:49,989 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:50:49,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:50:49,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 02:50:49,990 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 02:50:49,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:50:49,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1328641136, now seen corresponding path program 1 times [2023-02-17 02:50:49,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:50:49,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942913032] [2023-02-17 02:50:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:49,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:50:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:50:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:50:50,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:50:50,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942913032] [2023-02-17 02:50:50,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942913032] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:50:50,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:50:50,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 02:50:50,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936401522] [2023-02-17 02:50:50,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:50:50,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 02:50:50,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:50:50,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 02:50:50,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 02:50:50,144 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:50:50,244 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2023-02-17 02:50:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 02:50:50,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 02:50:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:50:50,245 INFO L225 Difference]: With dead ends: 88 [2023-02-17 02:50:50,245 INFO L226 Difference]: Without dead ends: 88 [2023-02-17 02:50:50,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-02-17 02:50:50,250 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 16 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 348 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 [2023-02-17 02:50:50,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 348 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:50:50,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-17 02:50:50,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2023-02-17 02:50:50,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 82 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) [2023-02-17 02:50:50,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2023-02-17 02:50:50,278 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 10 [2023-02-17 02:50:50,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:50:50,278 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2023-02-17 02:50:50,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:50,278 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2023-02-17 02:50:50,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 02:50:50,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:50:50,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:50:50,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 02:50:50,279 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 02:50:50,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:50:50,279 INFO L85 PathProgramCache]: Analyzing trace with hash 2075015976, now seen corresponding path program 1 times [2023-02-17 02:50:50,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:50:50,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34192137] [2023-02-17 02:50:50,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:50,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:50:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:50:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:50:50,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:50:50,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34192137] [2023-02-17 02:50:50,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34192137] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:50:50,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:50:50,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:50:50,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805339647] [2023-02-17 02:50:50,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:50:50,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 02:50:50,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:50:50,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 02:50:50,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:50:50,430 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:50,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:50:50,518 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2023-02-17 02:50:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:50:50,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-17 02:50:50,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:50:50,521 INFO L225 Difference]: With dead ends: 91 [2023-02-17 02:50:50,521 INFO L226 Difference]: Without dead ends: 91 [2023-02-17 02:50:50,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:50:50,525 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 153 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:50:50,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 94 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:50:50,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-17 02:50:50,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2023-02-17 02:50:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.5714285714285714) internal successors, (88), 81 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:50,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2023-02-17 02:50:50,534 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 18 [2023-02-17 02:50:50,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:50:50,534 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2023-02-17 02:50:50,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:50,535 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2023-02-17 02:50:50,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 02:50:50,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:50:50,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:50:50,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 02:50:50,536 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 02:50:50,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:50:50,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2075015977, now seen corresponding path program 1 times [2023-02-17 02:50:50,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:50:50,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159040687] [2023-02-17 02:50:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:50,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:50:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:50:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:50:50,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:50:50,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159040687] [2023-02-17 02:50:50,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159040687] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:50:50,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:50:50,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:50:50,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119302269] [2023-02-17 02:50:50,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:50:50,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 02:50:50,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:50:50,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 02:50:50,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:50:50,690 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:50:50,766 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2023-02-17 02:50:50,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 02:50:50,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-17 02:50:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:50:50,767 INFO L225 Difference]: With dead ends: 93 [2023-02-17 02:50:50,767 INFO L226 Difference]: Without dead ends: 93 [2023-02-17 02:50:50,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:50:50,770 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 205 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:50:50,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 92 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:50:50,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-17 02:50:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2023-02-17 02:50:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 80 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2023-02-17 02:50:50,780 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 18 [2023-02-17 02:50:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:50:50,781 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2023-02-17 02:50:50,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:50,781 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2023-02-17 02:50:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-17 02:50:50,782 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:50:50,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:50:50,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 02:50:50,782 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 02:50:50,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:50:50,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1257146476, now seen corresponding path program 1 times [2023-02-17 02:50:50,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:50:50,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103509303] [2023-02-17 02:50:50,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:50,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:50:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:50:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:50:50,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:50:50,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103509303] [2023-02-17 02:50:50,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103509303] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:50:50,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:50:50,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:50:50,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277460729] [2023-02-17 02:50:50,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:50:50,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:50:50,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:50:50,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:50:50,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:50:50,861 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:50,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:50:50,910 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2023-02-17 02:50:50,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 02:50:50,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-17 02:50:50,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:50:50,912 INFO L225 Difference]: With dead ends: 75 [2023-02-17 02:50:50,912 INFO L226 Difference]: Without dead ends: 75 [2023-02-17 02:50:50,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 02:50:50,913 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 88 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:50:50,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 107 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:50:50,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-17 02:50:50,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-02-17 02:50:50,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.54) internal successors, (77), 74 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2023-02-17 02:50:50,918 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 20 [2023-02-17 02:50:50,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:50:50,918 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2023-02-17 02:50:50,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2023-02-17 02:50:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 02:50:50,923 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:50:50,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:50:50,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 02:50:50,924 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 02:50:50,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:50:50,925 INFO L85 PathProgramCache]: Analyzing trace with hash -663319494, now seen corresponding path program 1 times [2023-02-17 02:50:50,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:50:50,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348080506] [2023-02-17 02:50:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:50,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:50:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:50:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:50:50,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:50:50,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348080506] [2023-02-17 02:50:50,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348080506] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:50:50,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:50:50,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 02:50:50,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306947837] [2023-02-17 02:50:50,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:50:50,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:50:50,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:50:50,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:50:50,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:50:50,975 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:51,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:50:51,036 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2023-02-17 02:50:51,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:50:51,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2023-02-17 02:50:51,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:50:51,037 INFO L225 Difference]: With dead ends: 74 [2023-02-17 02:50:51,037 INFO L226 Difference]: Without dead ends: 74 [2023-02-17 02:50:51,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-17 02:50:51,039 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 16 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:50:51,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 150 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:50:51,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-17 02:50:51,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-02-17 02:50:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.52) internal successors, (76), 73 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:51,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2023-02-17 02:50:51,041 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 21 [2023-02-17 02:50:51,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:50:51,041 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2023-02-17 02:50:51,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:51,041 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2023-02-17 02:50:51,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 02:50:51,042 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:50:51,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:50:51,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 02:50:51,042 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 02:50:51,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:50:51,043 INFO L85 PathProgramCache]: Analyzing trace with hash -663319493, now seen corresponding path program 1 times [2023-02-17 02:50:51,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:50:51,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870749915] [2023-02-17 02:50:51,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:51,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:50:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:50:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:50:51,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:50:51,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870749915] [2023-02-17 02:50:51,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870749915] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:50:51,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:50:51,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 02:50:51,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177103317] [2023-02-17 02:50:51,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:50:51,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 02:50:51,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:50:51,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 02:50:51,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:50:51,256 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:51,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:50:51,344 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2023-02-17 02:50:51,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:50:51,344 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2023-02-17 02:50:51,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:50:51,345 INFO L225 Difference]: With dead ends: 73 [2023-02-17 02:50:51,345 INFO L226 Difference]: Without dead ends: 73 [2023-02-17 02:50:51,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-02-17 02:50:51,346 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 91 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:50:51,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 117 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:50:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-17 02:50:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-02-17 02:50:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.5) internal successors, (75), 72 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) [2023-02-17 02:50:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2023-02-17 02:50:51,349 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 21 [2023-02-17 02:50:51,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:50:51,349 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2023-02-17 02:50:51,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2023-02-17 02:50:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 02:50:51,350 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:50:51,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:50:51,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 02:50:51,351 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 02:50:51,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:50:51,352 INFO L85 PathProgramCache]: Analyzing trace with hash 911932203, now seen corresponding path program 1 times [2023-02-17 02:50:51,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:50:51,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827108555] [2023-02-17 02:50:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:51,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:50:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:50:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:50:51,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:50:51,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827108555] [2023-02-17 02:50:51,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827108555] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:50:51,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:50:51,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-17 02:50:51,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506093700] [2023-02-17 02:50:51,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:50:51,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 02:50:51,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:50:51,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 02:50:51,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-17 02:50:51,587 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:51,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:50:51,832 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2023-02-17 02:50:51,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 02:50:51,833 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-17 02:50:51,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:50:51,833 INFO L225 Difference]: With dead ends: 139 [2023-02-17 02:50:51,833 INFO L226 Difference]: Without dead ends: 139 [2023-02-17 02:50:51,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2023-02-17 02:50:51,834 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 306 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:50:51,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 204 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:50:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-02-17 02:50:51,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 87. [2023-02-17 02:50:51,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.40625) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:51,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2023-02-17 02:50:51,837 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 22 [2023-02-17 02:50:51,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:50:51,837 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2023-02-17 02:50:51,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:50:51,838 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2023-02-17 02:50:51,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 02:50:51,838 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:50:51,838 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:50:51,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 02:50:51,839 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 02:50:51,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:50:51,839 INFO L85 PathProgramCache]: Analyzing trace with hash -428723026, now seen corresponding path program 1 times [2023-02-17 02:50:51,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:50:51,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806478202] [2023-02-17 02:50:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:51,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:50:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:50:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:50:52,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:50:52,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806478202] [2023-02-17 02:50:52,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806478202] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:50:52,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640107512] [2023-02-17 02:50:52,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:52,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:50:52,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:50:52,018 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:50:52,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 02:50:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:50:52,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-17 02:50:52,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:50:52,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 02:50:52,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:50:52,304 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 [2023-02-17 02:50:52,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:50:52,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 112 [2023-02-17 02:50:53,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:50:53,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 68 select indices, 68 select index equivalence classes, 0 disjoint index pairs (out of 2278 index pairs), introduced 68 new quantified variables, introduced 2278 case distinctions, treesize of input 2018 treesize of output 19490