./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_02-funloop_norace.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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_02-funloop_norace.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 ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 21:16:36,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:16:36,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:16:36,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:16:36,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:16:36,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:16:36,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:16:36,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:16:36,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:16:36,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:16:36,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:16:36,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:16:36,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:16:36,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:16:36,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:16:36,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:16:36,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:16:36,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:16:36,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:16:36,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:16:36,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:16:36,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:16:36,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:16:36,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:16:36,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:16:36,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:16:36,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:16:36,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:16:36,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:16:36,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:16:36,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:16:36,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:16:36,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:16:36,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:16:36,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:16:36,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:16:36,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:16:36,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:16:36,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:16:36,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:16:36,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:16:36,316 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:16:36,348 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:16:36,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:16:36,349 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:16:36,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:16:36,350 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:16:36,351 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:16:36,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:16:36,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:16:36,351 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:16:36,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:16:36,352 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:16:36,353 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:16:36,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:16:36,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:16:36,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:16:36,353 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:16:36,354 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:16:36,354 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:16:36,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:16:36,354 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:16:36,354 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:16:36,354 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:16:36,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:16:36,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:16:36,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:16:36,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:16:36,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:16:36,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:16:36,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:16:36,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:16:36,356 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:16:36,356 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:16:36,357 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:16:36,357 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:16:36,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:16:36,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:16:36,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:16:36,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:16:36,672 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:16:36,672 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:16:36,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_02-funloop_norace.i [2023-08-29 21:16:37,817 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:16:38,099 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:16:38,099 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_02-funloop_norace.i [2023-08-29 21:16:38,114 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3fc21062/aa6ff49344694f0d821719a90d9a8c97/FLAG3f7a41b44 [2023-08-29 21:16:38,125 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3fc21062/aa6ff49344694f0d821719a90d9a8c97 [2023-08-29 21:16:38,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:16:38,129 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:16:38,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:16:38,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:16:38,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:16:38,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:16:38" (1/1) ... [2023-08-29 21:16:38,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@475b1dc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:16:38, skipping insertion in model container [2023-08-29 21:16:38,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:16:38" (1/1) ... [2023-08-29 21:16:38,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:16:38,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:16:38,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:16:38,538 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:16:38,599 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:16:38,659 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:16:38,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:16:38 WrapperNode [2023-08-29 21:16:38,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:16:38,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:16:38,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:16:38,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:16:38,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:16:38" (1/1) ... [2023-08-29 21:16:38,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:16:38" (1/1) ... [2023-08-29 21:16:38,722 INFO L138 Inliner]: procedures = 262, calls = 13, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2023-08-29 21:16:38,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:16:38,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:16:38,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:16:38,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:16:38,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:16:38" (1/1) ... [2023-08-29 21:16:38,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:16:38" (1/1) ... [2023-08-29 21:16:38,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:16:38" (1/1) ... [2023-08-29 21:16:38,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:16:38" (1/1) ... [2023-08-29 21:16:38,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:16:38" (1/1) ... [2023-08-29 21:16:38,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:16:38" (1/1) ... [2023-08-29 21:16:38,764 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:16:38" (1/1) ... [2023-08-29 21:16:38,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:16:38" (1/1) ... [2023-08-29 21:16:38,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:16:38,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:16:38,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:16:38,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:16:38,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:16:38" (1/1) ... [2023-08-29 21:16:38,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:16:38,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:16:38,808 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) [2023-08-29 21:16:38,835 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 [2023-08-29 21:16:38,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:16:38,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:16:38,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:16:38,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:16:38,853 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:16:38,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:16:38,853 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:16:38,853 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:16:38,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:16:38,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:16:38,855 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 21:16:39,004 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:16:39,005 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:16:39,225 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:16:39,231 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:16:39,232 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-29 21:16:39,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:16:39 BoogieIcfgContainer [2023-08-29 21:16:39,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:16:39,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:16:39,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:16:39,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:16:39,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:16:38" (1/3) ... [2023-08-29 21:16:39,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f43f46e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:16:39, skipping insertion in model container [2023-08-29 21:16:39,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:16:38" (2/3) ... [2023-08-29 21:16:39,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f43f46e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:16:39, skipping insertion in model container [2023-08-29 21:16:39,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:16:39" (3/3) ... [2023-08-29 21:16:39,240 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_02-funloop_norace.i [2023-08-29 21:16:39,253 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:16:39,253 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-29 21:16:39,253 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:16:39,303 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 21:16:39,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 86 transitions, 177 flow [2023-08-29 21:16:39,371 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-08-29 21:16:39,372 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:16:39,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 154 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2023-08-29 21:16:39,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 86 transitions, 177 flow [2023-08-29 21:16:39,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 85 transitions, 173 flow [2023-08-29 21:16:39,383 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:16:39,391 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 85 transitions, 173 flow [2023-08-29 21:16:39,393 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 85 transitions, 173 flow [2023-08-29 21:16:39,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 173 flow [2023-08-29 21:16:39,411 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-08-29 21:16:39,412 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:16:39,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 156 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2023-08-29 21:16:39,414 INFO L119 LiptonReduction]: Number of co-enabled transitions 1782 [2023-08-29 21:16:41,360 INFO L134 LiptonReduction]: Checked pairs total: 2347 [2023-08-29 21:16:41,361 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-08-29 21:16:41,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:16:41,378 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;@19a11d54, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:16:41,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-29 21:16:41,380 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 21:16:41,380 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:16:41,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:16:41,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:16:41,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-29 21:16:41,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:16:41,385 INFO L85 PathProgramCache]: Analyzing trace with hash 10885, now seen corresponding path program 1 times [2023-08-29 21:16:41,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:16:41,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862891127] [2023-08-29 21:16:41,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:41,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:16:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:16:41,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:16:41,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862891127] [2023-08-29 21:16:41,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862891127] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:16:41,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:16:41,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:16:41,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327650994] [2023-08-29 21:16:41,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:16:41,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 21:16:41,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:16:41,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 21:16:41,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 21:16:41,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 172 [2023-08-29 21:16:41,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 57 flow. Second operand has 2 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 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) [2023-08-29 21:16:41,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:16:41,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 172 [2023-08-29 21:16:41,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:16:41,675 INFO L130 PetriNetUnfolder]: 74/155 cut-off events. [2023-08-29 21:16:41,676 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:16:41,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 155 events. 74/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 597 event pairs, 56 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 295. Up to 149 conditions per place. [2023-08-29 21:16:41,680 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 21 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2023-08-29 21:16:41,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 89 flow [2023-08-29 21:16:41,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 21:16:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 21:16:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 190 transitions. [2023-08-29 21:16:41,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523255813953488 [2023-08-29 21:16:41,694 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 190 transitions. [2023-08-29 21:16:41,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 190 transitions. [2023-08-29 21:16:41,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:16:41,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 190 transitions. [2023-08-29 21:16:41,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 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) [2023-08-29 21:16:41,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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) [2023-08-29 21:16:41,709 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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) [2023-08-29 21:16:41,711 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 57 flow. Second operand 2 states and 190 transitions. [2023-08-29 21:16:41,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 89 flow [2023-08-29 21:16:41,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 22 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:16:41,714 INFO L231 Difference]: Finished difference. Result has 23 places, 22 transitions, 46 flow [2023-08-29 21:16:41,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2023-08-29 21:16:41,719 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-29 21:16:41,719 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 46 flow [2023-08-29 21:16:41,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 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) [2023-08-29 21:16:41,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:16:41,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:16:41,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:16:41,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-29 21:16:41,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:16:41,721 INFO L85 PathProgramCache]: Analyzing trace with hash 324474418, now seen corresponding path program 1 times [2023-08-29 21:16:41,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:16:41,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560889378] [2023-08-29 21:16:41,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:41,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:16:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:16:41,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:16:41,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560889378] [2023-08-29 21:16:41,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560889378] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:16:41,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:16:41,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:16:41,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249320393] [2023-08-29 21:16:41,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:16:41,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:16:41,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:16:41,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:16:41,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:16:41,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 172 [2023-08-29 21:16:41,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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) [2023-08-29 21:16:41,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:16:41,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 172 [2023-08-29 21:16:41,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:16:41,883 INFO L130 PetriNetUnfolder]: 74/156 cut-off events. [2023-08-29 21:16:41,883 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:16:41,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 156 events. 74/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 597 event pairs, 56 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 307. Up to 149 conditions per place. [2023-08-29 21:16:41,885 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-08-29 21:16:41,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 92 flow [2023-08-29 21:16:41,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:16:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:16:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-08-29 21:16:41,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49806201550387597 [2023-08-29 21:16:41,891 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-08-29 21:16:41,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-08-29 21:16:41,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:16:41,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-08-29 21:16:41,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2023-08-29 21:16:41,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2023-08-29 21:16:41,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2023-08-29 21:16:41,896 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 46 flow. Second operand 3 states and 257 transitions. [2023-08-29 21:16:41,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 92 flow [2023-08-29 21:16:41,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 92 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:16:41,898 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 58 flow [2023-08-29 21:16:41,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2023-08-29 21:16:41,899 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -2 predicate places. [2023-08-29 21:16:41,899 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 58 flow [2023-08-29 21:16:41,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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) [2023-08-29 21:16:41,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:16:41,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:16:41,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:16:41,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-29 21:16:41,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:16:41,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1461062998, now seen corresponding path program 1 times [2023-08-29 21:16:41,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:16:41,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531368635] [2023-08-29 21:16:41,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:41,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:16:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:16:42,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:16:42,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531368635] [2023-08-29 21:16:42,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531368635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:16:42,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323439730] [2023-08-29 21:16:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:42,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:16:42,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:16:42,066 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:16:42,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 21:16:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:42,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 21:16:42,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:16:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:16:42,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:16:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:16:42,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323439730] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:16:42,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:16:42,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 21:16:42,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173268190] [2023-08-29 21:16:42,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:16:42,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:16:42,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:16:42,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:16:42,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:16:42,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 172 [2023-08-29 21:16:42,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 78.57142857142857) internal successors, (550), 7 states have internal predecessors, (550), 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) [2023-08-29 21:16:42,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:16:42,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 172 [2023-08-29 21:16:42,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:16:42,302 INFO L130 PetriNetUnfolder]: 74/159 cut-off events. [2023-08-29 21:16:42,303 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:16:42,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 159 events. 74/159 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 602 event pairs, 56 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 321. Up to 149 conditions per place. [2023-08-29 21:16:42,304 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 20 selfloop transitions, 5 changer transitions 0/26 dead transitions. [2023-08-29 21:16:42,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 120 flow [2023-08-29 21:16:42,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:16:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:16:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 490 transitions. [2023-08-29 21:16:42,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748062015503876 [2023-08-29 21:16:42,306 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 490 transitions. [2023-08-29 21:16:42,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 490 transitions. [2023-08-29 21:16:42,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:16:42,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 490 transitions. [2023-08-29 21:16:42,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 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) [2023-08-29 21:16:42,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 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) [2023-08-29 21:16:42,311 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 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) [2023-08-29 21:16:42,311 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 58 flow. Second operand 6 states and 490 transitions. [2023-08-29 21:16:42,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 120 flow [2023-08-29 21:16:42,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 116 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 21:16:42,312 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 90 flow [2023-08-29 21:16:42,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2023-08-29 21:16:42,313 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2023-08-29 21:16:42,313 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 90 flow [2023-08-29 21:16:42,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.57142857142857) internal successors, (550), 7 states have internal predecessors, (550), 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) [2023-08-29 21:16:42,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:16:42,314 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-29 21:16:42,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-29 21:16:42,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:16:42,519 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-29 21:16:42,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:16:42,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2031239374, now seen corresponding path program 2 times [2023-08-29 21:16:42,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:16:42,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485649431] [2023-08-29 21:16:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:42,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:16:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:16:42,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:16:42,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485649431] [2023-08-29 21:16:42,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485649431] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:16:42,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782465686] [2023-08-29 21:16:42,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:16:42,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:16:42,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:16:42,643 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:16:42,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 21:16:42,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 21:16:42,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:16:42,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 21:16:42,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:16:42,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:16:42,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:16:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 21:16:42,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:16:42,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782465686] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:16:42,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:16:42,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-08-29 21:16:42,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084840391] [2023-08-29 21:16:42,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:16:42,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:16:42,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:16:42,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:16:42,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-29 21:16:42,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 172 [2023-08-29 21:16:42,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 77.2) internal successors, (386), 5 states have internal predecessors, (386), 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) [2023-08-29 21:16:42,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:16:42,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 172 [2023-08-29 21:16:42,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:16:43,083 INFO L130 PetriNetUnfolder]: 119/260 cut-off events. [2023-08-29 21:16:43,083 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:16:43,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 260 events. 119/260 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1071 event pairs, 56 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 522. Up to 152 conditions per place. [2023-08-29 21:16:43,085 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 36 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2023-08-29 21:16:43,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 196 flow [2023-08-29 21:16:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:16:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:16:43,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 341 transitions. [2023-08-29 21:16:43,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956395348837209 [2023-08-29 21:16:43,088 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 341 transitions. [2023-08-29 21:16:43,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 341 transitions. [2023-08-29 21:16:43,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:16:43,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 341 transitions. [2023-08-29 21:16:43,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 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) [2023-08-29 21:16:43,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 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) [2023-08-29 21:16:43,091 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 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) [2023-08-29 21:16:43,091 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 90 flow. Second operand 4 states and 341 transitions. [2023-08-29 21:16:43,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 196 flow [2023-08-29 21:16:43,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 182 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 21:16:43,093 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 92 flow [2023-08-29 21:16:43,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-08-29 21:16:43,094 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2023-08-29 21:16:43,095 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 92 flow [2023-08-29 21:16:43,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.2) internal successors, (386), 5 states have internal predecessors, (386), 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) [2023-08-29 21:16:43,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:16:43,095 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-29 21:16:43,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-29 21:16:43,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-29 21:16:43,300 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-29 21:16:43,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:16:43,301 INFO L85 PathProgramCache]: Analyzing trace with hash -2031239495, now seen corresponding path program 1 times [2023-08-29 21:16:43,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:16:43,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327161792] [2023-08-29 21:16:43,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:43,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:16:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:16:43,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:16:43,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327161792] [2023-08-29 21:16:43,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327161792] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:16:43,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915494033] [2023-08-29 21:16:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:43,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:16:43,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:16:43,409 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:16:43,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 21:16:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:43,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:16:43,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:16:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:16:43,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:16:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:16:43,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915494033] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:16:43,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:16:43,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-29 21:16:43,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066598472] [2023-08-29 21:16:43,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:16:43,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 21:16:43,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:16:43,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 21:16:43,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-29 21:16:43,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 172 [2023-08-29 21:16:43,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 92 flow. Second operand has 12 states, 12 states have (on average 78.25) internal successors, (939), 12 states have internal predecessors, (939), 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) [2023-08-29 21:16:43,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:16:43,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 172 [2023-08-29 21:16:43,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:16:43,733 INFO L130 PetriNetUnfolder]: 119/264 cut-off events. [2023-08-29 21:16:43,734 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-29 21:16:43,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 264 events. 119/264 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1014 event pairs, 96 based on Foata normal form. 6/191 useless extension candidates. Maximal degree in co-relation 592. Up to 239 conditions per place. [2023-08-29 21:16:43,735 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 21 selfloop transitions, 11 changer transitions 0/33 dead transitions. [2023-08-29 21:16:43,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 33 transitions, 192 flow [2023-08-29 21:16:43,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 21:16:43,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 21:16:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 961 transitions. [2023-08-29 21:16:43,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46560077519379844 [2023-08-29 21:16:43,747 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 961 transitions. [2023-08-29 21:16:43,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 961 transitions. [2023-08-29 21:16:43,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:16:43,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 961 transitions. [2023-08-29 21:16:43,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 80.08333333333333) internal successors, (961), 12 states have internal predecessors, (961), 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) [2023-08-29 21:16:43,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 172.0) internal successors, (2236), 13 states have internal predecessors, (2236), 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) [2023-08-29 21:16:43,753 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 172.0) internal successors, (2236), 13 states have internal predecessors, (2236), 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) [2023-08-29 21:16:43,753 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 92 flow. Second operand 12 states and 961 transitions. [2023-08-29 21:16:43,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 33 transitions, 192 flow [2023-08-29 21:16:43,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 33 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:16:43,755 INFO L231 Difference]: Finished difference. Result has 51 places, 33 transitions, 172 flow [2023-08-29 21:16:43,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=172, PETRI_PLACES=51, PETRI_TRANSITIONS=33} [2023-08-29 21:16:43,756 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2023-08-29 21:16:43,756 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 33 transitions, 172 flow [2023-08-29 21:16:43,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 78.25) internal successors, (939), 12 states have internal predecessors, (939), 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) [2023-08-29 21:16:43,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:16:43,757 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-08-29 21:16:43,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-29 21:16:43,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:16:43,958 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-29 21:16:43,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:16:43,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1543130169, now seen corresponding path program 2 times [2023-08-29 21:16:43,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:16:43,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826961480] [2023-08-29 21:16:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:43,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:16:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:16:44,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:16:44,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826961480] [2023-08-29 21:16:44,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826961480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:16:44,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:16:44,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:16:44,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487419639] [2023-08-29 21:16:44,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:16:44,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:16:44,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:16:44,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:16:44,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:16:44,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 172 [2023-08-29 21:16:44,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 33 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 76.2) internal successors, (381), 5 states have internal predecessors, (381), 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) [2023-08-29 21:16:44,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:16:44,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 172 [2023-08-29 21:16:44,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:16:44,322 INFO L130 PetriNetUnfolder]: 184/382 cut-off events. [2023-08-29 21:16:44,322 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2023-08-29 21:16:44,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 382 events. 184/382 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1584 event pairs, 96 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 879. Up to 248 conditions per place. [2023-08-29 21:16:44,325 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 43 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-08-29 21:16:44,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 302 flow [2023-08-29 21:16:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:16:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:16:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2023-08-29 21:16:44,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4898255813953488 [2023-08-29 21:16:44,327 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 337 transitions. [2023-08-29 21:16:44,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 337 transitions. [2023-08-29 21:16:44,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:16:44,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 337 transitions. [2023-08-29 21:16:44,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 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) [2023-08-29 21:16:44,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 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) [2023-08-29 21:16:44,330 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 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) [2023-08-29 21:16:44,330 INFO L175 Difference]: Start difference. First operand has 51 places, 33 transitions, 172 flow. Second operand 4 states and 337 transitions. [2023-08-29 21:16:44,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 302 flow [2023-08-29 21:16:44,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 254 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-29 21:16:44,334 INFO L231 Difference]: Finished difference. Result has 50 places, 34 transitions, 142 flow [2023-08-29 21:16:44,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=50, PETRI_TRANSITIONS=34} [2023-08-29 21:16:44,335 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2023-08-29 21:16:44,335 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 34 transitions, 142 flow [2023-08-29 21:16:44,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.2) internal successors, (381), 5 states have internal predecessors, (381), 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) [2023-08-29 21:16:44,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:16:44,335 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-08-29 21:16:44,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:16:44,336 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-29 21:16:44,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:16:44,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1543130168, now seen corresponding path program 1 times [2023-08-29 21:16:44,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:16:44,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050814747] [2023-08-29 21:16:44,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:44,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:16:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:16:44,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:16:44,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050814747] [2023-08-29 21:16:44,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050814747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:16:44,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:16:44,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:16:44,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610863145] [2023-08-29 21:16:44,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:16:44,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:16:44,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:16:44,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:16:44,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:16:44,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 172 [2023-08-29 21:16:44,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 34 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 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) [2023-08-29 21:16:44,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:16:44,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 172 [2023-08-29 21:16:44,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:16:44,551 INFO L130 PetriNetUnfolder]: 158/334 cut-off events. [2023-08-29 21:16:44,551 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2023-08-29 21:16:44,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 334 events. 158/334 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1274 event pairs, 108 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 837. Up to 274 conditions per place. [2023-08-29 21:16:44,553 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 38 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2023-08-29 21:16:44,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 250 flow [2023-08-29 21:16:44,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:16:44,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:16:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-08-29 21:16:44,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213178294573644 [2023-08-29 21:16:44,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-08-29 21:16:44,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-08-29 21:16:44,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:16:44,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-08-29 21:16:44,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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) [2023-08-29 21:16:44,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2023-08-29 21:16:44,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2023-08-29 21:16:44,557 INFO L175 Difference]: Start difference. First operand has 50 places, 34 transitions, 142 flow. Second operand 3 states and 269 transitions. [2023-08-29 21:16:44,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 250 flow [2023-08-29 21:16:44,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:16:44,560 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 142 flow [2023-08-29 21:16:44,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2023-08-29 21:16:44,560 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 21 predicate places. [2023-08-29 21:16:44,561 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 142 flow [2023-08-29 21:16:44,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 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) [2023-08-29 21:16:44,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:16:44,561 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-29 21:16:44,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 21:16:44,562 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-29 21:16:44,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:16:44,562 INFO L85 PathProgramCache]: Analyzing trace with hash 592398959, now seen corresponding path program 1 times [2023-08-29 21:16:44,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:16:44,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772111490] [2023-08-29 21:16:44,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:44,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:16:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:16:44,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:16:44,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772111490] [2023-08-29 21:16:44,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772111490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:16:44,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:16:44,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:16:44,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050009229] [2023-08-29 21:16:44,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:16:44,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:16:44,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:16:44,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:16:44,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:16:44,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 172 [2023-08-29 21:16:44,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 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) [2023-08-29 21:16:44,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:16:44,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 172 [2023-08-29 21:16:44,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:16:44,878 INFO L130 PetriNetUnfolder]: 136/300 cut-off events. [2023-08-29 21:16:44,878 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2023-08-29 21:16:44,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 300 events. 136/300 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1181 event pairs, 9 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 782. Up to 190 conditions per place. [2023-08-29 21:16:44,880 INFO L137 encePairwiseOnDemand]: 163/172 looper letters, 47 selfloop transitions, 10 changer transitions 0/57 dead transitions. [2023-08-29 21:16:44,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 338 flow [2023-08-29 21:16:44,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:16:44,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:16:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 415 transitions. [2023-08-29 21:16:44,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2023-08-29 21:16:44,882 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 415 transitions. [2023-08-29 21:16:44,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 415 transitions. [2023-08-29 21:16:44,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:16:44,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 415 transitions. [2023-08-29 21:16:44,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 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) [2023-08-29 21:16:44,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 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) [2023-08-29 21:16:44,884 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 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) [2023-08-29 21:16:44,885 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 142 flow. Second operand 5 states and 415 transitions. [2023-08-29 21:16:44,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 338 flow [2023-08-29 21:16:44,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:16:44,887 INFO L231 Difference]: Finished difference. Result has 55 places, 40 transitions, 212 flow [2023-08-29 21:16:44,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=55, PETRI_TRANSITIONS=40} [2023-08-29 21:16:44,888 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2023-08-29 21:16:44,888 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 40 transitions, 212 flow [2023-08-29 21:16:44,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 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) [2023-08-29 21:16:44,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:16:44,888 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:16:44,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:16:44,888 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-29 21:16:44,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:16:44,889 INFO L85 PathProgramCache]: Analyzing trace with hash 137532136, now seen corresponding path program 1 times [2023-08-29 21:16:44,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:16:44,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094903395] [2023-08-29 21:16:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:44,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:16:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:16:45,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:16:45,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094903395] [2023-08-29 21:16:45,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094903395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:16:45,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169177530] [2023-08-29 21:16:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:45,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:16:45,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:16:45,122 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:16:45,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 21:16:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:45,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 21:16:45,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:16:45,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:16:45,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:16:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:16:45,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:16:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:16:45,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169177530] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:16:45,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:16:45,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-29 21:16:45,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556931266] [2023-08-29 21:16:45,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:16:45,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 21:16:45,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:16:45,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 21:16:45,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-08-29 21:16:46,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 172 [2023-08-29 21:16:46,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 40 transitions, 212 flow. Second operand has 15 states, 15 states have (on average 74.0) internal successors, (1110), 15 states have internal predecessors, (1110), 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) [2023-08-29 21:16:46,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:16:46,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 172 [2023-08-29 21:16:46,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:16:46,515 INFO L130 PetriNetUnfolder]: 280/618 cut-off events. [2023-08-29 21:16:46,515 INFO L131 PetriNetUnfolder]: For 399/399 co-relation queries the response was YES. [2023-08-29 21:16:46,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 618 events. 280/618 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2536 event pairs, 54 based on Foata normal form. 84/679 useless extension candidates. Maximal degree in co-relation 1925. Up to 196 conditions per place. [2023-08-29 21:16:46,519 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 106 selfloop transitions, 8 changer transitions 0/115 dead transitions. [2023-08-29 21:16:46,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 115 transitions, 780 flow [2023-08-29 21:16:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 21:16:46,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 21:16:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 662 transitions. [2023-08-29 21:16:46,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811046511627907 [2023-08-29 21:16:46,522 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 662 transitions. [2023-08-29 21:16:46,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 662 transitions. [2023-08-29 21:16:46,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:16:46,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 662 transitions. [2023-08-29 21:16:46,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 82.75) internal successors, (662), 8 states have internal predecessors, (662), 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) [2023-08-29 21:16:46,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 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) [2023-08-29 21:16:46,526 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 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) [2023-08-29 21:16:46,526 INFO L175 Difference]: Start difference. First operand has 55 places, 40 transitions, 212 flow. Second operand 8 states and 662 transitions. [2023-08-29 21:16:46,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 115 transitions, 780 flow [2023-08-29 21:16:46,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 115 transitions, 780 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:16:46,530 INFO L231 Difference]: Finished difference. Result has 66 places, 44 transitions, 277 flow [2023-08-29 21:16:46,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=277, PETRI_PLACES=66, PETRI_TRANSITIONS=44} [2023-08-29 21:16:46,531 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 38 predicate places. [2023-08-29 21:16:46,531 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 44 transitions, 277 flow [2023-08-29 21:16:46,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 74.0) internal successors, (1110), 15 states have internal predecessors, (1110), 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) [2023-08-29 21:16:46,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:16:46,532 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:16:46,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 21:16:46,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:16:46,737 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-29 21:16:46,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:16:46,737 INFO L85 PathProgramCache]: Analyzing trace with hash 28456066, now seen corresponding path program 1 times [2023-08-29 21:16:46,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:16:46,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028379156] [2023-08-29 21:16:46,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:46,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:16:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:16:46,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:16:46,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028379156] [2023-08-29 21:16:46,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028379156] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:16:46,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392511668] [2023-08-29 21:16:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:46,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:16:46,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:16:47,001 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:16:47,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 21:16:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 21:16:47,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:16:47,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:16:47,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:16:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:16:47,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:16:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:16:47,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392511668] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:16:47,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:16:47,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-29 21:16:47,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823901095] [2023-08-29 21:16:47,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:16:47,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 21:16:47,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:16:47,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 21:16:47,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-08-29 21:16:47,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 172 [2023-08-29 21:16:47,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 44 transitions, 277 flow. Second operand has 15 states, 15 states have (on average 73.0) internal successors, (1095), 15 states have internal predecessors, (1095), 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) [2023-08-29 21:16:47,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:16:47,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 172 [2023-08-29 21:16:47,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:16:48,284 INFO L130 PetriNetUnfolder]: 556/1170 cut-off events. [2023-08-29 21:16:48,284 INFO L131 PetriNetUnfolder]: For 2461/2461 co-relation queries the response was YES. [2023-08-29 21:16:48,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4004 conditions, 1170 events. 556/1170 cut-off events. For 2461/2461 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 5342 event pairs, 132 based on Foata normal form. 138/1285 useless extension candidates. Maximal degree in co-relation 3979. Up to 424 conditions per place. [2023-08-29 21:16:48,291 INFO L137 encePairwiseOnDemand]: 165/172 looper letters, 111 selfloop transitions, 7 changer transitions 0/119 dead transitions. [2023-08-29 21:16:48,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 119 transitions, 999 flow [2023-08-29 21:16:48,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 21:16:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 21:16:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 648 transitions. [2023-08-29 21:16:48,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2023-08-29 21:16:48,294 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 648 transitions. [2023-08-29 21:16:48,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 648 transitions. [2023-08-29 21:16:48,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:16:48,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 648 transitions. [2023-08-29 21:16:48,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 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) [2023-08-29 21:16:48,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 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) [2023-08-29 21:16:48,298 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 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) [2023-08-29 21:16:48,298 INFO L175 Difference]: Start difference. First operand has 66 places, 44 transitions, 277 flow. Second operand 8 states and 648 transitions. [2023-08-29 21:16:48,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 119 transitions, 999 flow [2023-08-29 21:16:48,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 119 transitions, 948 flow, removed 19 selfloop flow, removed 2 redundant places. [2023-08-29 21:16:48,303 INFO L231 Difference]: Finished difference. Result has 75 places, 48 transitions, 336 flow [2023-08-29 21:16:48,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=75, PETRI_TRANSITIONS=48} [2023-08-29 21:16:48,304 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 47 predicate places. [2023-08-29 21:16:48,304 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 48 transitions, 336 flow [2023-08-29 21:16:48,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 73.0) internal successors, (1095), 15 states have internal predecessors, (1095), 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) [2023-08-29 21:16:48,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:16:48,305 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-08-29 21:16:48,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 21:16:48,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-29 21:16:48,510 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-29 21:16:48,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:16:48,510 INFO L85 PathProgramCache]: Analyzing trace with hash -495639670, now seen corresponding path program 2 times [2023-08-29 21:16:48,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:16:48,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538222697] [2023-08-29 21:16:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:48,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:16:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:16:48,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:16:48,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538222697] [2023-08-29 21:16:48,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538222697] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:16:48,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246483632] [2023-08-29 21:16:48,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:16:48,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:16:48,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:16:48,886 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:16:48,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 21:16:48,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:16:48,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:16:48,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 21:16:48,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:16:49,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:16:49,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:16:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:16:49,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:16:49,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246483632] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:16:49,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:16:49,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-08-29 21:16:49,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555714596] [2023-08-29 21:16:49,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:16:49,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:16:49,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:16:49,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:16:49,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-08-29 21:16:49,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 172 [2023-08-29 21:16:49,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 48 transitions, 336 flow. Second operand has 9 states, 9 states have (on average 78.44444444444444) internal successors, (706), 9 states have internal predecessors, (706), 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) [2023-08-29 21:16:49,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:16:49,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 172 [2023-08-29 21:16:49,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:16:49,781 INFO L130 PetriNetUnfolder]: 530/1120 cut-off events. [2023-08-29 21:16:49,781 INFO L131 PetriNetUnfolder]: For 2232/2232 co-relation queries the response was YES. [2023-08-29 21:16:49,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4188 conditions, 1120 events. 530/1120 cut-off events. For 2232/2232 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 5045 event pairs, 0 based on Foata normal form. 26/1124 useless extension candidates. Maximal degree in co-relation 4159. Up to 276 conditions per place. [2023-08-29 21:16:49,789 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 130 selfloop transitions, 6 changer transitions 0/137 dead transitions. [2023-08-29 21:16:49,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 137 transitions, 1190 flow [2023-08-29 21:16:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 21:16:49,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 21:16:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 688 transitions. [2023-08-29 21:16:49,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-29 21:16:49,791 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 688 transitions. [2023-08-29 21:16:49,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 688 transitions. [2023-08-29 21:16:49,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:16:49,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 688 transitions. [2023-08-29 21:16:49,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 86.0) internal successors, (688), 8 states have internal predecessors, (688), 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) [2023-08-29 21:16:49,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 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) [2023-08-29 21:16:49,796 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 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) [2023-08-29 21:16:49,796 INFO L175 Difference]: Start difference. First operand has 75 places, 48 transitions, 336 flow. Second operand 8 states and 688 transitions. [2023-08-29 21:16:49,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 137 transitions, 1190 flow [2023-08-29 21:16:49,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 137 transitions, 1141 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-29 21:16:49,803 INFO L231 Difference]: Finished difference. Result has 79 places, 46 transitions, 313 flow [2023-08-29 21:16:49,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=313, PETRI_PLACES=79, PETRI_TRANSITIONS=46} [2023-08-29 21:16:49,804 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 51 predicate places. [2023-08-29 21:16:49,804 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 46 transitions, 313 flow [2023-08-29 21:16:49,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.44444444444444) internal successors, (706), 9 states have internal predecessors, (706), 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) [2023-08-29 21:16:49,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:16:49,805 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-08-29 21:16:49,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 21:16:50,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:16:50,010 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-29 21:16:50,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:16:50,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1803083171, now seen corresponding path program 2 times [2023-08-29 21:16:50,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:16:50,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842950591] [2023-08-29 21:16:50,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:50,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:16:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:16:50,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:16:50,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842950591] [2023-08-29 21:16:50,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842950591] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:16:50,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634848291] [2023-08-29 21:16:50,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:16:50,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:16:50,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:16:50,421 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:16:50,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 21:16:50,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:16:50,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:16:50,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-29 21:16:50,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:16:50,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:16:50,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:16:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:16:50,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:16:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:16:53,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634848291] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:16:53,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:16:53,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-08-29 21:16:53,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539444381] [2023-08-29 21:16:53,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:16:53,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 21:16:53,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:16:53,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 21:16:53,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2023-08-29 21:16:54,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 172 [2023-08-29 21:16:54,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 46 transitions, 313 flow. Second operand has 25 states, 25 states have (on average 73.64) internal successors, (1841), 25 states have internal predecessors, (1841), 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) [2023-08-29 21:16:54,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:16:54,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 172 [2023-08-29 21:16:54,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:16:55,526 INFO L130 PetriNetUnfolder]: 1058/2176 cut-off events. [2023-08-29 21:16:55,526 INFO L131 PetriNetUnfolder]: For 6686/6686 co-relation queries the response was YES. [2023-08-29 21:16:55,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7841 conditions, 2176 events. 1058/2176 cut-off events. For 6686/6686 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 9848 event pairs, 125 based on Foata normal form. 264/2418 useless extension candidates. Maximal degree in co-relation 7812. Up to 491 conditions per place. [2023-08-29 21:16:55,541 INFO L137 encePairwiseOnDemand]: 165/172 looper letters, 188 selfloop transitions, 13 changer transitions 0/202 dead transitions. [2023-08-29 21:16:55,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 202 transitions, 1707 flow [2023-08-29 21:16:55,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 21:16:55,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 21:16:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1137 transitions. [2023-08-29 21:16:55,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47217607973421927 [2023-08-29 21:16:55,546 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1137 transitions. [2023-08-29 21:16:55,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1137 transitions. [2023-08-29 21:16:55,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:16:55,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1137 transitions. [2023-08-29 21:16:55,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 81.21428571428571) internal successors, (1137), 14 states have internal predecessors, (1137), 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) [2023-08-29 21:16:55,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 172.0) internal successors, (2580), 15 states have internal predecessors, (2580), 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) [2023-08-29 21:16:55,554 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 172.0) internal successors, (2580), 15 states have internal predecessors, (2580), 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) [2023-08-29 21:16:55,554 INFO L175 Difference]: Start difference. First operand has 79 places, 46 transitions, 313 flow. Second operand 14 states and 1137 transitions. [2023-08-29 21:16:55,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 202 transitions, 1707 flow [2023-08-29 21:16:55,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 202 transitions, 1597 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 21:16:55,566 INFO L231 Difference]: Finished difference. Result has 92 places, 52 transitions, 438 flow [2023-08-29 21:16:55,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=438, PETRI_PLACES=92, PETRI_TRANSITIONS=52} [2023-08-29 21:16:55,568 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 64 predicate places. [2023-08-29 21:16:55,568 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 52 transitions, 438 flow [2023-08-29 21:16:55,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 73.64) internal successors, (1841), 25 states have internal predecessors, (1841), 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) [2023-08-29 21:16:55,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:16:55,569 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-08-29 21:16:55,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 21:16:55,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:16:55,774 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-29 21:16:55,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:16:55,775 INFO L85 PathProgramCache]: Analyzing trace with hash 65465491, now seen corresponding path program 3 times [2023-08-29 21:16:55,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:16:55,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151230287] [2023-08-29 21:16:55,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:55,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:16:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 153 proven. 37 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:16:56,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:16:56,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151230287] [2023-08-29 21:16:56,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151230287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:16:56,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141510722] [2023-08-29 21:16:56,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 21:16:56,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:16:56,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:16:56,093 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:16:56,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 21:16:56,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 21:16:56,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:16:56,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 21:16:56,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:16:56,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:16:56,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:16:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-08-29 21:16:56,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:16:56,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141510722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:16:56,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:16:56,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2023-08-29 21:16:56,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421456687] [2023-08-29 21:16:56,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:16:56,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:16:56,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:16:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:16:56,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-29 21:16:56,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 172 [2023-08-29 21:16:56,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 52 transitions, 438 flow. Second operand has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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) [2023-08-29 21:16:56,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:16:56,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 172 [2023-08-29 21:16:56,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:16:57,137 INFO L130 PetriNetUnfolder]: 1036/2132 cut-off events. [2023-08-29 21:16:57,137 INFO L131 PetriNetUnfolder]: For 6165/6165 co-relation queries the response was YES. [2023-08-29 21:16:57,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8113 conditions, 2132 events. 1036/2132 cut-off events. For 6165/6165 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 9683 event pairs, 21 based on Foata normal form. 22/2132 useless extension candidates. Maximal degree in co-relation 8078. Up to 1910 conditions per place. [2023-08-29 21:16:57,161 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 81 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-29 21:16:57,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 86 transitions, 803 flow [2023-08-29 21:16:57,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:16:57,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:16:57,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 473 transitions. [2023-08-29 21:16:57,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-08-29 21:16:57,163 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 473 transitions. [2023-08-29 21:16:57,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 473 transitions. [2023-08-29 21:16:57,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:16:57,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 473 transitions. [2023-08-29 21:16:57,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 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) [2023-08-29 21:16:57,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 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) [2023-08-29 21:16:57,167 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 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) [2023-08-29 21:16:57,167 INFO L175 Difference]: Start difference. First operand has 92 places, 52 transitions, 438 flow. Second operand 6 states and 473 transitions. [2023-08-29 21:16:57,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 86 transitions, 803 flow [2023-08-29 21:16:57,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 86 transitions, 763 flow, removed 13 selfloop flow, removed 7 redundant places. [2023-08-29 21:16:57,181 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 390 flow [2023-08-29 21:16:57,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=390, PETRI_PLACES=90, PETRI_TRANSITIONS=52} [2023-08-29 21:16:57,184 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 62 predicate places. [2023-08-29 21:16:57,184 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 390 flow [2023-08-29 21:16:57,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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) [2023-08-29 21:16:57,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:16:57,185 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-08-29 21:16:57,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 21:16:57,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-29 21:16:57,390 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-29 21:16:57,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:16:57,390 INFO L85 PathProgramCache]: Analyzing trace with hash 65465486, now seen corresponding path program 1 times [2023-08-29 21:16:57,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:16:57,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263787411] [2023-08-29 21:16:57,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:57,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:16:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-08-29 21:16:57,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:16:57,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263787411] [2023-08-29 21:16:57,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263787411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:16:57,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:16:57,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:16:57,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94797554] [2023-08-29 21:16:57,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:16:57,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:16:57,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:16:57,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:16:57,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:16:57,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 172 [2023-08-29 21:16:57,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 52 transitions, 390 flow. Second operand has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 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) [2023-08-29 21:16:57,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:16:57,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 172 [2023-08-29 21:16:57,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:16:57,976 INFO L130 PetriNetUnfolder]: 1014/2063 cut-off events. [2023-08-29 21:16:57,976 INFO L131 PetriNetUnfolder]: For 4639/4639 co-relation queries the response was YES. [2023-08-29 21:16:57,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7513 conditions, 2063 events. 1014/2063 cut-off events. For 4639/4639 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 9408 event pairs, 924 based on Foata normal form. 0/2063 useless extension candidates. Maximal degree in co-relation 7477. Up to 1982 conditions per place. [2023-08-29 21:16:57,994 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 52 selfloop transitions, 4 changer transitions 2/59 dead transitions. [2023-08-29 21:16:57,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 59 transitions, 512 flow [2023-08-29 21:16:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:16:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:16:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 320 transitions. [2023-08-29 21:16:57,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2023-08-29 21:16:57,996 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 320 transitions. [2023-08-29 21:16:57,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 320 transitions. [2023-08-29 21:16:57,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:16:57,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 320 transitions. [2023-08-29 21:16:57,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 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) [2023-08-29 21:16:57,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 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) [2023-08-29 21:16:57,999 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 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) [2023-08-29 21:16:57,999 INFO L175 Difference]: Start difference. First operand has 90 places, 52 transitions, 390 flow. Second operand 4 states and 320 transitions. [2023-08-29 21:16:57,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 59 transitions, 512 flow [2023-08-29 21:16:58,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 59 transitions, 507 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:16:58,045 INFO L231 Difference]: Finished difference. Result has 89 places, 49 transitions, 331 flow [2023-08-29 21:16:58,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=331, PETRI_PLACES=89, PETRI_TRANSITIONS=49} [2023-08-29 21:16:58,047 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 61 predicate places. [2023-08-29 21:16:58,052 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 49 transitions, 331 flow [2023-08-29 21:16:58,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 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) [2023-08-29 21:16:58,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:16:58,052 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:16:58,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 21:16:58,053 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-08-29 21:16:58,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:16:58,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1803452644, now seen corresponding path program 1 times [2023-08-29 21:16:58,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:16:58,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526289565] [2023-08-29 21:16:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:58,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:16:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-08-29 21:16:58,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:16:58,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526289565] [2023-08-29 21:16:58,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526289565] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:16:58,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972903117] [2023-08-29 21:16:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:16:58,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:16:58,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:16:58,273 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:16:58,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 21:16:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:16:58,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 21:16:58,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:16:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-08-29 21:16:58,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:16:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-08-29 21:16:58,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972903117] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:16:58,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:16:58,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-08-29 21:16:58,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585942549] [2023-08-29 21:16:58,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:16:58,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:16:58,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:16:58,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:16:58,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:16:58,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 172 [2023-08-29 21:16:58,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 49 transitions, 331 flow. Second operand has 9 states, 9 states have (on average 71.44444444444444) internal successors, (643), 9 states have internal predecessors, (643), 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) [2023-08-29 21:16:58,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:16:58,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 172 [2023-08-29 21:16:58,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:16:59,205 INFO L130 PetriNetUnfolder]: 968/1960 cut-off events. [2023-08-29 21:16:59,205 INFO L131 PetriNetUnfolder]: For 4279/4279 co-relation queries the response was YES. [2023-08-29 21:16:59,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7049 conditions, 1960 events. 968/1960 cut-off events. For 4279/4279 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 9067 event pairs, 44 based on Foata normal form. 10/1970 useless extension candidates. Maximal degree in co-relation 7013. Up to 1665 conditions per place. [2023-08-29 21:16:59,214 INFO L137 encePairwiseOnDemand]: 165/172 looper letters, 0 selfloop transitions, 0 changer transitions 91/91 dead transitions. [2023-08-29 21:16:59,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 91 transitions, 769 flow [2023-08-29 21:16:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:16:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:16:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 513 transitions. [2023-08-29 21:16:59,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4260797342192691 [2023-08-29 21:16:59,216 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 513 transitions. [2023-08-29 21:16:59,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 513 transitions. [2023-08-29 21:16:59,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:16:59,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 513 transitions. [2023-08-29 21:16:59,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 73.28571428571429) internal successors, (513), 7 states have internal predecessors, (513), 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) [2023-08-29 21:16:59,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 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) [2023-08-29 21:16:59,220 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 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) [2023-08-29 21:16:59,220 INFO L175 Difference]: Start difference. First operand has 89 places, 49 transitions, 331 flow. Second operand 7 states and 513 transitions. [2023-08-29 21:16:59,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 91 transitions, 769 flow [2023-08-29 21:16:59,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 91 transitions, 736 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-08-29 21:16:59,232 INFO L231 Difference]: Finished difference. Result has 84 places, 0 transitions, 0 flow [2023-08-29 21:16:59,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=84, PETRI_TRANSITIONS=0} [2023-08-29 21:16:59,233 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2023-08-29 21:16:59,233 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 0 transitions, 0 flow [2023-08-29 21:16:59,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 71.44444444444444) internal successors, (643), 9 states have internal predecessors, (643), 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) [2023-08-29 21:16:59,236 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2023-08-29 21:16:59,236 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-08-29 21:16:59,236 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (13 of 16 remaining) [2023-08-29 21:16:59,236 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-08-29 21:16:59,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-08-29 21:16:59,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-08-29 21:16:59,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2023-08-29 21:16:59,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 16 remaining) [2023-08-29 21:16:59,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-08-29 21:16:59,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-08-29 21:16:59,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-08-29 21:16:59,238 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-08-29 21:16:59,238 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2023-08-29 21:16:59,238 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2023-08-29 21:16:59,238 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2023-08-29 21:16:59,238 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2023-08-29 21:16:59,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 21:16:59,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-29 21:16:59,446 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:16:59,451 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-29 21:16:59,451 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-29 21:16:59,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 09:16:59 BasicIcfg [2023-08-29 21:16:59,455 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-29 21:16:59,455 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-29 21:16:59,455 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-29 21:16:59,455 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-29 21:16:59,456 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:16:39" (3/4) ... [2023-08-29 21:16:59,458 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-29 21:16:59,463 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-08-29 21:16:59,468 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-08-29 21:16:59,468 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-29 21:16:59,468 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-29 21:16:59,500 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-29 21:16:59,501 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-29 21:16:59,501 INFO L158 Benchmark]: Toolchain (without parser) took 21372.55ms. Allocated memory was 86.0MB in the beginning and 274.7MB in the end (delta: 188.7MB). Free memory was 59.2MB in the beginning and 166.4MB in the end (delta: -107.1MB). Peak memory consumption was 82.2MB. Max. memory is 16.1GB. [2023-08-29 21:16:59,501 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory is still 38.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 21:16:59,502 INFO L158 Benchmark]: CACSL2BoogieTranslator took 530.93ms. Allocated memory is still 86.0MB. Free memory was 59.0MB in the beginning and 52.0MB in the end (delta: 7.0MB). Peak memory consumption was 19.4MB. Max. memory is 16.1GB. [2023-08-29 21:16:59,502 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.31ms. Allocated memory is still 86.0MB. Free memory was 52.0MB in the beginning and 49.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 21:16:59,502 INFO L158 Benchmark]: Boogie Preprocessor took 50.74ms. Allocated memory is still 86.0MB. Free memory was 49.8MB in the beginning and 48.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 21:16:59,502 INFO L158 Benchmark]: RCFGBuilder took 458.56ms. Allocated memory is still 86.0MB. Free memory was 47.9MB in the beginning and 62.5MB in the end (delta: -14.6MB). Peak memory consumption was 17.2MB. Max. memory is 16.1GB. [2023-08-29 21:16:59,503 INFO L158 Benchmark]: TraceAbstraction took 20219.92ms. Allocated memory was 86.0MB in the beginning and 274.7MB in the end (delta: 188.7MB). Free memory was 61.5MB in the beginning and 169.1MB in the end (delta: -107.6MB). Peak memory consumption was 190.5MB. Max. memory is 16.1GB. [2023-08-29 21:16:59,503 INFO L158 Benchmark]: Witness Printer took 45.53ms. Allocated memory is still 274.7MB. Free memory was 169.1MB in the beginning and 166.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 21:16:59,506 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory is still 38.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 530.93ms. Allocated memory is still 86.0MB. Free memory was 59.0MB in the beginning and 52.0MB in the end (delta: 7.0MB). Peak memory consumption was 19.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.31ms. Allocated memory is still 86.0MB. Free memory was 52.0MB in the beginning and 49.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.74ms. Allocated memory is still 86.0MB. Free memory was 49.8MB in the beginning and 48.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 458.56ms. Allocated memory is still 86.0MB. Free memory was 47.9MB in the beginning and 62.5MB in the end (delta: -14.6MB). Peak memory consumption was 17.2MB. Max. memory is 16.1GB. * TraceAbstraction took 20219.92ms. Allocated memory was 86.0MB in the beginning and 274.7MB in the end (delta: 188.7MB). Free memory was 61.5MB in the beginning and 169.1MB in the end (delta: -107.6MB). Peak memory consumption was 190.5MB. Max. memory is 16.1GB. * Witness Printer took 45.53ms. Allocated memory is still 274.7MB. Free memory was 169.1MB in the beginning and 166.4MB in the end (delta: 2.8MB). 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: 2.0s, 83 PlacesBefore, 28 PlacesAfterwards, 85 TransitionsBefore, 27 TransitionsAfterwards, 1782 CoEnabledTransitionPairs, 4 FixpointIterations, 19 TrivialSequentialCompositions, 58 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 86 TotalNumberOfCompositions, 2347 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1609, independent: 1539, independent conditional: 0, independent unconditional: 1539, dependent: 70, dependent conditional: 0, dependent unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 978, independent: 947, independent conditional: 0, independent unconditional: 947, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1609, independent: 592, independent conditional: 0, independent unconditional: 592, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 978, unknown conditional: 0, unknown unconditional: 978] , Statistics on independence cache: Total cache size (in pairs): 34, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, 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: 932]: 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 - 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: -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, 108 locations, 16 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: 20.1s, OverallIterations: 15, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3211 SdHoareTripleChecker+Valid, 4.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2693 mSDsluCounter, 1422 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1344 mSDsCounter, 142 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7625 IncrementalHoareTripleChecker+Invalid, 7767 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 142 mSolverCounterUnsat, 78 mSDtfsCounter, 7625 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 471 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=438occurred in iteration=12, InterpolantAutomatonStates: 94, 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: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 582 NumberOfCodeBlocks, 540 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 694 ConstructedInterpolants, 33 QuantifiedInterpolants, 7409 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1925 ConjunctsInSsa, 168 ConjunctsInUnsatCore, 30 InterpolantComputations, 9 PerfectInterpolantSequences, 2211/2439 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 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-29 21:16:59,536 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