./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_13-equ_proc_nr.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_13-equ_proc_nr.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 7aa541197ab3d76d3553dcc8603f5c865e8a029202164eb406db53a61111f080 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 00:08:16,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:08:16,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:08:16,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:08:16,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:08:16,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:08:16,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:08:16,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:08:16,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:08:16,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:08:16,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:08:16,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:08:16,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:08:16,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:08:16,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:08:16,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:08:16,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:08:16,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:08:16,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:08:16,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:08:16,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:08:16,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:08:16,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:08:16,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:08:16,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:08:16,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:08:16,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:08:16,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:08:16,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:08:16,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:08:16,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:08:16,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:08:16,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:08:16,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:08:16,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:08:16,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:08:16,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:08:16,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:08:16,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:08:16,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:08:16,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:08:16,398 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:08:16,417 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:08:16,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:08:16,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:08:16,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:08:16,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:08:16,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:08:16,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:08:16,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:08:16,419 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:08:16,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:08:16,420 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:08:16,420 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:08:16,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:08:16,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:08:16,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:08:16,421 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:08:16,421 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:08:16,421 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:08:16,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:08:16,421 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:08:16,421 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:08:16,422 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:08:16,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:08:16,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:08:16,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:08:16,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:08:16,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:08:16,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:08:16,423 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:08:16,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:08:16,423 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:08:16,423 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:08:16,424 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:08:16,424 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:08:16,424 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7aa541197ab3d76d3553dcc8603f5c865e8a029202164eb406db53a61111f080 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:08:16,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:08:16,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:08:16,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:08:16,756 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:08:16,756 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:08:16,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_13-equ_proc_nr.i [2023-09-01 00:08:17,983 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:08:18,243 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:08:18,243 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_13-equ_proc_nr.i [2023-09-01 00:08:18,259 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a61dc760/07043773d046436887905d504b52d1d7/FLAGe3914d316 [2023-09-01 00:08:18,275 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a61dc760/07043773d046436887905d504b52d1d7 [2023-09-01 00:08:18,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:08:18,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:08:18,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:08:18,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:08:18,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:08:18,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:08:18" (1/1) ... [2023-09-01 00:08:18,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bea0d4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:08:18, skipping insertion in model container [2023-09-01 00:08:18,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:08:18" (1/1) ... [2023-09-01 00:08:18,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:08:18,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:08:18,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:08:18,793 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:08:18,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:08:18,932 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:08:18,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:08:18 WrapperNode [2023-09-01 00:08:18,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:08:18,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:08:18,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:08:18,935 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:08:18,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:08:18" (1/1) ... [2023-09-01 00:08:18,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:08:18" (1/1) ... [2023-09-01 00:08:18,993 INFO L138 Inliner]: procedures = 266, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2023-09-01 00:08:18,993 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:08:18,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:08:18,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:08:18,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:08:19,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:08:18" (1/1) ... [2023-09-01 00:08:19,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:08:18" (1/1) ... [2023-09-01 00:08:19,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:08:18" (1/1) ... [2023-09-01 00:08:19,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:08:18" (1/1) ... [2023-09-01 00:08:19,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:08:18" (1/1) ... [2023-09-01 00:08:19,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:08:18" (1/1) ... [2023-09-01 00:08:19,030 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:08:18" (1/1) ... [2023-09-01 00:08:19,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:08:18" (1/1) ... [2023-09-01 00:08:19,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:08:19,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:08:19,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:08:19,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:08:19,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:08:18" (1/1) ... [2023-09-01 00:08:19,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:08:19,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:08:19,082 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) [2023-09-01 00:08:19,116 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 [2023-09-01 00:08:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:08:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:08:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:08:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:08:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:08:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 00:08:19,130 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 00:08:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 00:08:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:08:19,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:08:19,132 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 00:08:19,309 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:08:19,310 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:08:19,514 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:08:19,520 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:08:19,520 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-09-01 00:08:19,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:08:19 BoogieIcfgContainer [2023-09-01 00:08:19,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:08:19,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:08:19,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:08:19,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:08:19,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:08:18" (1/3) ... [2023-09-01 00:08:19,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307374ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:08:19, skipping insertion in model container [2023-09-01 00:08:19,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:08:18" (2/3) ... [2023-09-01 00:08:19,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307374ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:08:19, skipping insertion in model container [2023-09-01 00:08:19,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:08:19" (3/3) ... [2023-09-01 00:08:19,535 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_13-equ_proc_nr.i [2023-09-01 00:08:19,549 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:08:19,549 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-09-01 00:08:19,549 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:08:19,595 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 00:08:19,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 73 transitions, 151 flow [2023-09-01 00:08:19,659 INFO L130 PetriNetUnfolder]: 1/72 cut-off events. [2023-09-01 00:08:19,659 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:08:19,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 72 events. 1/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-09-01 00:08:19,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 73 transitions, 151 flow [2023-09-01 00:08:19,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 72 transitions, 147 flow [2023-09-01 00:08:19,669 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:08:19,676 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 72 transitions, 147 flow [2023-09-01 00:08:19,678 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 72 transitions, 147 flow [2023-09-01 00:08:19,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 72 transitions, 147 flow [2023-09-01 00:08:19,696 INFO L130 PetriNetUnfolder]: 1/72 cut-off events. [2023-09-01 00:08:19,697 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:08:19,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 72 events. 1/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-09-01 00:08:19,705 INFO L119 LiptonReduction]: Number of co-enabled transitions 342 [2023-09-01 00:08:23,769 INFO L134 LiptonReduction]: Checked pairs total: 920 [2023-09-01 00:08:23,770 INFO L136 LiptonReduction]: Total number of compositions: 71 [2023-09-01 00:08:23,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 00:08:23,792 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;@3e3f0f58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:08:23,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-09-01 00:08:23,794 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-09-01 00:08:23,794 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:08:23,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:23,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 00:08:23,795 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-09-01 00:08:23,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:23,800 INFO L85 PathProgramCache]: Analyzing trace with hash 262, now seen corresponding path program 1 times [2023-09-01 00:08:23,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:23,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130819850] [2023-09-01 00:08:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:23,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:08:23,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:23,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130819850] [2023-09-01 00:08:23,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130819850] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:23,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:08:23,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 00:08:23,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37780522] [2023-09-01 00:08:23,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:23,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 00:08:23,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:23,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 00:08:23,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 00:08:23,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2023-09-01 00:08:23,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 35 flow. Second operand has 2 states, 2 states have (on average 72.5) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:23,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:23,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2023-09-01 00:08:23,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:23,972 INFO L130 PetriNetUnfolder]: 35/84 cut-off events. [2023-09-01 00:08:23,974 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:08:23,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 84 events. 35/84 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 271 event pairs, 35 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 164. Up to 85 conditions per place. [2023-09-01 00:08:23,978 INFO L137 encePairwiseOnDemand]: 142/144 looper letters, 14 selfloop transitions, 0 changer transitions 0/14 dead transitions. [2023-09-01 00:08:23,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 14 transitions, 59 flow [2023-09-01 00:08:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 00:08:23,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 00:08:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2023-09-01 00:08:23,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-09-01 00:08:23,993 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2023-09-01 00:08:23,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2023-09-01 00:08:23,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:23,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2023-09-01 00:08:24,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,010 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,012 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 35 flow. Second operand 2 states and 160 transitions. [2023-09-01 00:08:24,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 14 transitions, 59 flow [2023-09-01 00:08:24,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 14 transitions, 58 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 00:08:24,017 INFO L231 Difference]: Finished difference. Result has 18 places, 14 transitions, 30 flow [2023-09-01 00:08:24,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=30, PETRI_PLACES=18, PETRI_TRANSITIONS=14} [2023-09-01 00:08:24,022 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -2 predicate places. [2023-09-01 00:08:24,023 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 14 transitions, 30 flow [2023-09-01 00:08:24,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 72.5) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:24,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 00:08:24,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:08:24,024 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-09-01 00:08:24,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:24,026 INFO L85 PathProgramCache]: Analyzing trace with hash 256017, now seen corresponding path program 1 times [2023-09-01 00:08:24,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:24,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875291897] [2023-09-01 00:08:24,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:24,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:08:24,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:24,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875291897] [2023-09-01 00:08:24,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875291897] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:24,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:08:24,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 00:08:24,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671959856] [2023-09-01 00:08:24,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:24,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:08:24,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:24,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:08:24,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:08:24,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 144 [2023-09-01 00:08:24,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 30 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:24,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 144 [2023-09-01 00:08:24,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:24,385 INFO L130 PetriNetUnfolder]: 28/69 cut-off events. [2023-09-01 00:08:24,386 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:08:24,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 69 events. 28/69 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 205 event pairs, 28 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 140. Up to 69 conditions per place. [2023-09-01 00:08:24,387 INFO L137 encePairwiseOnDemand]: 142/144 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-09-01 00:08:24,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 13 transitions, 54 flow [2023-09-01 00:08:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:08:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:08:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-09-01 00:08:24,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2023-09-01 00:08:24,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-09-01 00:08:24,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-09-01 00:08:24,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:24,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-09-01 00:08:24,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,393 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,393 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 30 flow. Second operand 3 states and 221 transitions. [2023-09-01 00:08:24,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 13 transitions, 54 flow [2023-09-01 00:08:24,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 13 transitions, 54 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:08:24,394 INFO L231 Difference]: Finished difference. Result has 19 places, 13 transitions, 30 flow [2023-09-01 00:08:24,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=30, PETRI_PLACES=19, PETRI_TRANSITIONS=13} [2023-09-01 00:08:24,395 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-09-01 00:08:24,395 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 13 transitions, 30 flow [2023-09-01 00:08:24,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:24,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 00:08:24,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 00:08:24,396 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-09-01 00:08:24,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:24,397 INFO L85 PathProgramCache]: Analyzing trace with hash 256038, now seen corresponding path program 1 times [2023-09-01 00:08:24,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:24,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287574961] [2023-09-01 00:08:24,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:24,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:08:24,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:24,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287574961] [2023-09-01 00:08:24,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287574961] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:24,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:08:24,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 00:08:24,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504224571] [2023-09-01 00:08:24,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:24,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:08:24,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:24,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:08:24,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:08:24,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-09-01 00:08:24,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 13 transitions, 30 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:24,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-09-01 00:08:24,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:24,709 INFO L130 PetriNetUnfolder]: 24/60 cut-off events. [2023-09-01 00:08:24,710 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:08:24,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 60 events. 24/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 165 event pairs, 24 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 123. Up to 60 conditions per place. [2023-09-01 00:08:24,712 INFO L137 encePairwiseOnDemand]: 142/144 looper letters, 11 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2023-09-01 00:08:24,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 12 transitions, 52 flow [2023-09-01 00:08:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:08:24,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:08:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2023-09-01 00:08:24,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023148148148148 [2023-09-01 00:08:24,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 217 transitions. [2023-09-01 00:08:24,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 217 transitions. [2023-09-01 00:08:24,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:24,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 217 transitions. [2023-09-01 00:08:24,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,721 INFO L175 Difference]: Start difference. First operand has 19 places, 13 transitions, 30 flow. Second operand 3 states and 217 transitions. [2023-09-01 00:08:24,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 12 transitions, 52 flow [2023-09-01 00:08:24,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 12 transitions, 51 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 00:08:24,722 INFO L231 Difference]: Finished difference. Result has 19 places, 12 transitions, 29 flow [2023-09-01 00:08:24,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=29, PETRI_PLACES=19, PETRI_TRANSITIONS=12} [2023-09-01 00:08:24,723 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-09-01 00:08:24,726 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 12 transitions, 29 flow [2023-09-01 00:08:24,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:24,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 00:08:24,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 00:08:24,728 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-09-01 00:08:24,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash 256037, now seen corresponding path program 1 times [2023-09-01 00:08:24,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:24,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056304462] [2023-09-01 00:08:24,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:24,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:08:24,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:24,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056304462] [2023-09-01 00:08:24,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056304462] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:24,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:08:24,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 00:08:24,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886472776] [2023-09-01 00:08:24,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:24,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:08:24,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:24,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:08:24,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:08:24,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-09-01 00:08:24,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 12 transitions, 29 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:24,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-09-01 00:08:24,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:24,959 INFO L130 PetriNetUnfolder]: 20/51 cut-off events. [2023-09-01 00:08:24,960 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:08:24,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 51 events. 20/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 127 event pairs, 12 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 106. Up to 33 conditions per place. [2023-09-01 00:08:24,960 INFO L137 encePairwiseOnDemand]: 140/144 looper letters, 12 selfloop transitions, 3 changer transitions 0/15 dead transitions. [2023-09-01 00:08:24,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 15 transitions, 65 flow [2023-09-01 00:08:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:08:24,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:08:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 220 transitions. [2023-09-01 00:08:24,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2023-09-01 00:08:24,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 220 transitions. [2023-09-01 00:08:24,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 220 transitions. [2023-09-01 00:08:24,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:24,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 220 transitions. [2023-09-01 00:08:24,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,965 INFO L175 Difference]: Start difference. First operand has 19 places, 12 transitions, 29 flow. Second operand 3 states and 220 transitions. [2023-09-01 00:08:24,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 15 transitions, 65 flow [2023-09-01 00:08:24,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 15 transitions, 64 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 00:08:24,966 INFO L231 Difference]: Finished difference. Result has 19 places, 11 transitions, 32 flow [2023-09-01 00:08:24,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32, PETRI_PLACES=19, PETRI_TRANSITIONS=11} [2023-09-01 00:08:24,967 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-09-01 00:08:24,967 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 11 transitions, 32 flow [2023-09-01 00:08:24,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:24,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:24,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 00:08:24,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 00:08:24,968 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-09-01 00:08:24,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:24,969 INFO L85 PathProgramCache]: Analyzing trace with hash 7935815, now seen corresponding path program 1 times [2023-09-01 00:08:24,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:24,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128230118] [2023-09-01 00:08:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:24,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:08:25,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:25,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128230118] [2023-09-01 00:08:25,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128230118] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:25,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:08:25,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 00:08:25,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625798539] [2023-09-01 00:08:25,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:25,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:08:25,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:25,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:08:25,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:08:25,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-09-01 00:08:25,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 11 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:25,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:25,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-09-01 00:08:25,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:25,068 INFO L130 PetriNetUnfolder]: 13/44 cut-off events. [2023-09-01 00:08:25,069 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:08:25,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 44 events. 13/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 104 event pairs, 9 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 101. Up to 30 conditions per place. [2023-09-01 00:08:25,069 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 10 selfloop transitions, 4 changer transitions 0/14 dead transitions. [2023-09-01 00:08:25,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 14 transitions, 66 flow [2023-09-01 00:08:25,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:08:25,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:08:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-09-01 00:08:25,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2023-09-01 00:08:25,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-09-01 00:08:25,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-09-01 00:08:25,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:25,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-09-01 00:08:25,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:25,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:25,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:25,074 INFO L175 Difference]: Start difference. First operand has 19 places, 11 transitions, 32 flow. Second operand 3 states and 219 transitions. [2023-09-01 00:08:25,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 14 transitions, 66 flow [2023-09-01 00:08:25,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 14 transitions, 60 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 00:08:25,075 INFO L231 Difference]: Finished difference. Result has 21 places, 12 transitions, 48 flow [2023-09-01 00:08:25,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=21, PETRI_TRANSITIONS=12} [2023-09-01 00:08:25,076 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2023-09-01 00:08:25,076 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 12 transitions, 48 flow [2023-09-01 00:08:25,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:25,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:25,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 00:08:25,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 00:08:25,077 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-09-01 00:08:25,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:25,078 INFO L85 PathProgramCache]: Analyzing trace with hash -962560630, now seen corresponding path program 1 times [2023-09-01 00:08:25,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:25,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497532091] [2023-09-01 00:08:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:25,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:08:25,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:25,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497532091] [2023-09-01 00:08:25,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497532091] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:25,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:08:25,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 00:08:25,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816498759] [2023-09-01 00:08:25,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:25,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:08:25,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:25,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:08:25,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:08:25,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-09-01 00:08:25,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 12 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:25,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:25,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-09-01 00:08:25,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:25,188 INFO L130 PetriNetUnfolder]: 11/35 cut-off events. [2023-09-01 00:08:25,188 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 00:08:25,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 35 events. 11/35 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 64 event pairs, 9 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 91. Up to 26 conditions per place. [2023-09-01 00:08:25,189 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 7 selfloop transitions, 2 changer transitions 4/13 dead transitions. [2023-09-01 00:08:25,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 13 transitions, 72 flow [2023-09-01 00:08:25,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:08:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:08:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2023-09-01 00:08:25,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2023-09-01 00:08:25,192 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 218 transitions. [2023-09-01 00:08:25,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 218 transitions. [2023-09-01 00:08:25,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:25,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 218 transitions. [2023-09-01 00:08:25,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:25,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:25,194 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:25,194 INFO L175 Difference]: Start difference. First operand has 21 places, 12 transitions, 48 flow. Second operand 3 states and 218 transitions. [2023-09-01 00:08:25,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 13 transitions, 72 flow [2023-09-01 00:08:25,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 66 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 00:08:25,196 INFO L231 Difference]: Finished difference. Result has 20 places, 8 transitions, 30 flow [2023-09-01 00:08:25,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=30, PETRI_PLACES=20, PETRI_TRANSITIONS=8} [2023-09-01 00:08:25,196 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-09-01 00:08:25,197 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 8 transitions, 30 flow [2023-09-01 00:08:25,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:25,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:25,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:08:25,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 00:08:25,198 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-09-01 00:08:25,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:25,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1705738851, now seen corresponding path program 1 times [2023-09-01 00:08:25,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:25,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304987343] [2023-09-01 00:08:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:25,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:08:25,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:25,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304987343] [2023-09-01 00:08:25,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304987343] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:25,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:08:25,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:08:25,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009635896] [2023-09-01 00:08:25,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:25,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 00:08:25,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:25,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 00:08:25,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 00:08:25,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 144 [2023-09-01 00:08:25,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 8 transitions, 30 flow. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:25,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:25,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 144 [2023-09-01 00:08:25,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:25,310 INFO L130 PetriNetUnfolder]: 4/15 cut-off events. [2023-09-01 00:08:25,310 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 00:08:25,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 15 events. 4/15 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 4 based on Foata normal form. 1/16 useless extension candidates. Maximal degree in co-relation 40. Up to 15 conditions per place. [2023-09-01 00:08:25,311 INFO L137 encePairwiseOnDemand]: 142/144 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-09-01 00:08:25,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 7 transitions, 40 flow [2023-09-01 00:08:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:08:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:08:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2023-09-01 00:08:25,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4699074074074074 [2023-09-01 00:08:25,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 203 transitions. [2023-09-01 00:08:25,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 203 transitions. [2023-09-01 00:08:25,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:25,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 203 transitions. [2023-09-01 00:08:25,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:25,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:25,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:25,315 INFO L175 Difference]: Start difference. First operand has 20 places, 8 transitions, 30 flow. Second operand 3 states and 203 transitions. [2023-09-01 00:08:25,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 7 transitions, 40 flow [2023-09-01 00:08:25,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 7 transitions, 32 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 00:08:25,316 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-09-01 00:08:25,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2023-09-01 00:08:25,317 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -5 predicate places. [2023-09-01 00:08:25,317 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-09-01 00:08:25,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:08:25,319 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-09-01 00:08:25,320 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-09-01 00:08:25,320 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-09-01 00:08:25,320 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-09-01 00:08:25,321 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2023-09-01 00:08:25,321 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 10 remaining) [2023-09-01 00:08:25,321 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 10 remaining) [2023-09-01 00:08:25,321 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2023-09-01 00:08:25,321 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2023-09-01 00:08:25,322 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 10 remaining) [2023-09-01 00:08:25,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 00:08:25,322 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:08:25,326 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 00:08:25,326 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 00:08:25,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 12:08:25 BasicIcfg [2023-09-01 00:08:25,330 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 00:08:25,330 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 00:08:25,330 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 00:08:25,331 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 00:08:25,331 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:08:19" (3/4) ... [2023-09-01 00:08:25,333 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-09-01 00:08:25,338 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-09-01 00:08:25,342 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-09-01 00:08:25,342 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-09-01 00:08:25,342 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-09-01 00:08:25,369 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 00:08:25,369 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 00:08:25,370 INFO L158 Benchmark]: Toolchain (without parser) took 7091.54ms. Allocated memory was 58.7MB in the beginning and 109.1MB in the end (delta: 50.3MB). Free memory was 35.0MB in the beginning and 50.9MB in the end (delta: -16.0MB). Peak memory consumption was 35.6MB. Max. memory is 16.1GB. [2023-09-01 00:08:25,370 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 48.2MB. Free memory was 26.5MB in the beginning and 26.5MB in the end (delta: 54.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 00:08:25,371 INFO L158 Benchmark]: CACSL2BoogieTranslator took 654.49ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 34.8MB in the beginning and 45.7MB in the end (delta: -10.9MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. [2023-09-01 00:08:25,371 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.63ms. Allocated memory is still 71.3MB. Free memory was 45.7MB in the beginning and 43.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 00:08:25,371 INFO L158 Benchmark]: Boogie Preprocessor took 49.06ms. Allocated memory is still 71.3MB. Free memory was 43.3MB in the beginning and 42.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 00:08:25,372 INFO L158 Benchmark]: RCFGBuilder took 482.96ms. Allocated memory is still 71.3MB. Free memory was 41.8MB in the beginning and 45.1MB in the end (delta: -3.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-09-01 00:08:25,372 INFO L158 Benchmark]: TraceAbstraction took 5801.54ms. Allocated memory was 71.3MB in the beginning and 109.1MB in the end (delta: 37.7MB). Free memory was 44.5MB in the beginning and 53.0MB in the end (delta: -8.5MB). Peak memory consumption was 29.9MB. Max. memory is 16.1GB. [2023-09-01 00:08:25,372 INFO L158 Benchmark]: Witness Printer took 39.31ms. Allocated memory is still 109.1MB. Free memory was 53.0MB in the beginning and 50.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 00:08:25,374 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 48.2MB. Free memory was 26.5MB in the beginning and 26.5MB in the end (delta: 54.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 654.49ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 34.8MB in the beginning and 45.7MB in the end (delta: -10.9MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.63ms. Allocated memory is still 71.3MB. Free memory was 45.7MB in the beginning and 43.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.06ms. Allocated memory is still 71.3MB. Free memory was 43.3MB in the beginning and 42.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 482.96ms. Allocated memory is still 71.3MB. Free memory was 41.8MB in the beginning and 45.1MB in the end (delta: -3.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 5801.54ms. Allocated memory was 71.3MB in the beginning and 109.1MB in the end (delta: 37.7MB). Free memory was 44.5MB in the beginning and 53.0MB in the end (delta: -8.5MB). Peak memory consumption was 29.9MB. Max. memory is 16.1GB. * Witness Printer took 39.31ms. Allocated memory is still 109.1MB. Free memory was 53.0MB in the beginning and 50.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.1s, 75 PlacesBefore, 20 PlacesAfterwards, 72 TransitionsBefore, 16 TransitionsAfterwards, 342 CoEnabledTransitionPairs, 7 FixpointIterations, 45 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 71 TotalNumberOfCompositions, 920 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 489, independent: 389, independent conditional: 0, independent unconditional: 389, dependent: 100, dependent conditional: 0, dependent unconditional: 100, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 199, independent: 180, independent conditional: 0, independent unconditional: 180, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 489, independent: 209, independent conditional: 0, independent unconditional: 209, dependent: 81, dependent conditional: 0, dependent unconditional: 81, unknown: 199, unknown conditional: 0, unknown unconditional: 199] , Statistics on independence cache: Total cache size (in pairs): 17, Positive cache size: 9, Positive conditional cache size: 0, Positive unconditional cache size: 9, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1001]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 84 locations, 10 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.7s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 383 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 166 mSDsluCounter, 28 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 331 IncrementalHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 19 mSDtfsCounter, 331 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=5, InterpolantAutomatonStates: 20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 194 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-09-01 00:08:25,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE