./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.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/28-race_reach_07-cond_racing2.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 45d1947e02656e790dafd6ca03f6eadb14d0b370e2217b75740af9998d975bef --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 21:37:54,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:37:54,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:37:55,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:37:55,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:37:55,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:37:55,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:37:55,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:37:55,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:37:55,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:37:55,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:37:55,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:37:55,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:37:55,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:37:55,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:37:55,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:37:55,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:37:55,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:37:55,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:37:55,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:37:55,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:37:55,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:37:55,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:37:55,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:37:55,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:37:55,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:37:55,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:37:55,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:37:55,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:37:55,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:37:55,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:37:55,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:37:55,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:37:55,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:37:55,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:37:55,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:37:55,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:37:55,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:37:55,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:37:55,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:37:55,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:37:55,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:37:55,111 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:37:55,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:37:55,112 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:37:55,112 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:37:55,113 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:37:55,113 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:37:55,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:37:55,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:37:55,115 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:37:55,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:37:55,116 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:37:55,116 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:37:55,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:37:55,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:37:55,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:37:55,117 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:37:55,117 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:37:55,117 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:37:55,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:37:55,118 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:37:55,118 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:37:55,118 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:37:55,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:37:55,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:37:55,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:37:55,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:37:55,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:37:55,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:37:55,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:37:55,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:37:55,120 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:37:55,120 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:37:55,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:37:55,121 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:37:55,121 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45d1947e02656e790dafd6ca03f6eadb14d0b370e2217b75740af9998d975bef Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:37:55,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:37:55,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:37:55,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:37:55,446 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:37:55,448 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:37:55,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-08-29 21:37:56,670 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:37:56,960 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:37:56,961 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-08-29 21:37:56,972 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de98e7588/e26984f6072b43729942baec8d9f10a1/FLAGf366397d3 [2023-08-29 21:37:56,986 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de98e7588/e26984f6072b43729942baec8d9f10a1 [2023-08-29 21:37:56,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:37:56,989 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:37:56,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:37:56,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:37:56,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:37:56,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:37:56" (1/1) ... [2023-08-29 21:37:56,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66cfac8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:37:56, skipping insertion in model container [2023-08-29 21:37:56,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:37:56" (1/1) ... [2023-08-29 21:37:57,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:37:57,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:37:57,338 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i[41322,41335] [2023-08-29 21:37:57,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:37:57,363 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:37:57,401 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i[41322,41335] [2023-08-29 21:37:57,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:37:57,477 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:37:57,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:37:57 WrapperNode [2023-08-29 21:37:57,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:37:57,478 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:37:57,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:37:57,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:37:57,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:37:57" (1/1) ... [2023-08-29 21:37:57,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:37:57" (1/1) ... [2023-08-29 21:37:57,545 INFO L138 Inliner]: procedures = 270, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2023-08-29 21:37:57,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:37:57,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:37:57,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:37:57,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:37:57,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:37:57" (1/1) ... [2023-08-29 21:37:57,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:37:57" (1/1) ... [2023-08-29 21:37:57,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:37:57" (1/1) ... [2023-08-29 21:37:57,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:37:57" (1/1) ... [2023-08-29 21:37:57,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:37:57" (1/1) ... [2023-08-29 21:37:57,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:37:57" (1/1) ... [2023-08-29 21:37:57,593 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:37:57" (1/1) ... [2023-08-29 21:37:57,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:37:57" (1/1) ... [2023-08-29 21:37:57,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:37:57,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:37:57,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:37:57,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:37:57,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:37:57" (1/1) ... [2023-08-29 21:37:57,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:37:57,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:37:57,639 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 21:37:57,643 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 21:37:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:37:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:37:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:37:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:37:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:37:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:37:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:37:57,664 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:37:57,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:37:57,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:37:57,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:37:57,666 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 21:37:57,792 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:37:57,794 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:37:58,069 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:37:58,075 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:37:58,080 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-29 21:37:58,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:37:58 BoogieIcfgContainer [2023-08-29 21:37:58,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:37:58,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:37:58,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:37:58,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:37:58,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:37:56" (1/3) ... [2023-08-29 21:37:58,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0d46d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:37:58, skipping insertion in model container [2023-08-29 21:37:58,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:37:57" (2/3) ... [2023-08-29 21:37:58,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0d46d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:37:58, skipping insertion in model container [2023-08-29 21:37:58,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:37:58" (3/3) ... [2023-08-29 21:37:58,093 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_07-cond_racing2.i [2023-08-29 21:37:58,107 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:37:58,107 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-29 21:37:58,107 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:37:58,190 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 21:37:58,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 129 transitions, 266 flow [2023-08-29 21:37:58,309 INFO L130 PetriNetUnfolder]: 23/178 cut-off events. [2023-08-29 21:37:58,309 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:37:58,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 178 events. 23/178 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 438 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2023-08-29 21:37:58,315 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 129 transitions, 266 flow [2023-08-29 21:37:58,324 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 129 transitions, 266 flow [2023-08-29 21:37:58,327 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:37:58,345 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 129 transitions, 266 flow [2023-08-29 21:37:58,352 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 129 transitions, 266 flow [2023-08-29 21:37:58,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 129 transitions, 266 flow [2023-08-29 21:37:58,397 INFO L130 PetriNetUnfolder]: 23/178 cut-off events. [2023-08-29 21:37:58,397 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:37:58,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 178 events. 23/178 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 438 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2023-08-29 21:37:58,401 INFO L119 LiptonReduction]: Number of co-enabled transitions 3080 [2023-08-29 21:38:01,822 INFO L134 LiptonReduction]: Checked pairs total: 5768 [2023-08-29 21:38:01,823 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-29 21:38:01,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:38:01,839 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;@1cb1d67c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:38:01,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:38:01,843 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:38:01,843 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:38:01,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:01,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:38:01,844 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:01,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash 15832, now seen corresponding path program 1 times [2023-08-29 21:38:01,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:01,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283106808] [2023-08-29 21:38:01,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:01,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:02,060 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 21:38:02,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:02,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283106808] [2023-08-29 21:38:02,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283106808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:38:02,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:38:02,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:38:02,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001577707] [2023-08-29 21:38:02,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:38:02,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:38:02,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:02,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:38:02,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:38:02,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 243 [2023-08-29 21:38:02,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:38:02,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:02,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 243 [2023-08-29 21:38:02,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:02,233 INFO L130 PetriNetUnfolder]: 131/295 cut-off events. [2023-08-29 21:38:02,234 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:38:02,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 295 events. 131/295 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1243 event pairs, 104 based on Foata normal form. 26/240 useless extension candidates. Maximal degree in co-relation 545. Up to 255 conditions per place. [2023-08-29 21:38:02,236 INFO L137 encePairwiseOnDemand]: 229/243 looper letters, 32 selfloop transitions, 2 changer transitions 3/38 dead transitions. [2023-08-29 21:38:02,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 156 flow [2023-08-29 21:38:02,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:38:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:38:02,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-29 21:38:02,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130315500685871 [2023-08-29 21:38:02,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-29 21:38:02,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-29 21:38:02,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:02,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-29 21:38:02,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 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 21:38:02,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 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 21:38:02,261 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 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 21:38:02,262 INFO L175 Difference]: Start difference. First operand has 33 places, 41 transitions, 90 flow. Second operand 3 states and 374 transitions. [2023-08-29 21:38:02,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 156 flow [2023-08-29 21:38:02,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 156 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:38:02,267 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 64 flow [2023-08-29 21:38:02,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2023-08-29 21:38:02,271 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 0 predicate places. [2023-08-29 21:38:02,271 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 64 flow [2023-08-29 21:38:02,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:38:02,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:02,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:38:02,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:38:02,273 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:02,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:02,273 INFO L85 PathProgramCache]: Analyzing trace with hash 15830, now seen corresponding path program 1 times [2023-08-29 21:38:02,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:02,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704063538] [2023-08-29 21:38:02,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:02,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:02,389 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 21:38:02,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:02,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704063538] [2023-08-29 21:38:02,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704063538] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:38:02,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:38:02,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:38:02,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546723483] [2023-08-29 21:38:02,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:38:02,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:38:02,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:02,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:38:02,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:38:02,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 243 [2023-08-29 21:38:02,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 21:38:02,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:02,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 243 [2023-08-29 21:38:02,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:02,503 INFO L130 PetriNetUnfolder]: 113/247 cut-off events. [2023-08-29 21:38:02,503 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 21:38:02,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 247 events. 113/247 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 911 event pairs, 84 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 486. Up to 236 conditions per place. [2023-08-29 21:38:02,505 INFO L137 encePairwiseOnDemand]: 238/243 looper letters, 32 selfloop transitions, 2 changer transitions 1/36 dead transitions. [2023-08-29 21:38:02,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 152 flow [2023-08-29 21:38:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:38:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:38:02,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2023-08-29 21:38:02,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50480109739369 [2023-08-29 21:38:02,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2023-08-29 21:38:02,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2023-08-29 21:38:02,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:02,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2023-08-29 21:38:02,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 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 21:38:02,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 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 21:38:02,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 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 21:38:02,513 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 64 flow. Second operand 3 states and 368 transitions. [2023-08-29 21:38:02,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 152 flow [2023-08-29 21:38:02,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 36 transitions, 146 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:38:02,515 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 70 flow [2023-08-29 21:38:02,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-08-29 21:38:02,516 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2023-08-29 21:38:02,516 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 70 flow [2023-08-29 21:38:02,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 21:38:02,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:02,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:38:02,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:38:02,517 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:02,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:02,518 INFO L85 PathProgramCache]: Analyzing trace with hash 471973036, now seen corresponding path program 1 times [2023-08-29 21:38:02,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:02,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319347318] [2023-08-29 21:38:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:02,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:02,624 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 21:38:02,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:02,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319347318] [2023-08-29 21:38:02,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319347318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:38:02,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551734679] [2023-08-29 21:38:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:02,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:38:02,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:38:02,630 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 21:38:02,637 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 21:38:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:02,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:38:02,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:38:02,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:38:02,809 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 21:38:02,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:38:02,876 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 21:38:02,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551734679] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:38:02,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:38:02,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:38:02,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535941300] [2023-08-29 21:38:02,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:38:02,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:38:02,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:02,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:38:02,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:38:03,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 243 [2023-08-29 21:38:03,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 70 flow. Second operand has 8 states, 8 states have (on average 107.875) internal successors, (863), 8 states have internal predecessors, (863), 0 states have call successors, (0), 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 21:38:03,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:03,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 243 [2023-08-29 21:38:03,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:03,072 INFO L130 PetriNetUnfolder]: 16/46 cut-off events. [2023-08-29 21:38:03,073 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-29 21:38:03,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 46 events. 16/46 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 7 based on Foata normal form. 9/55 useless extension candidates. Maximal degree in co-relation 45. Up to 34 conditions per place. [2023-08-29 21:38:03,073 INFO L137 encePairwiseOnDemand]: 238/243 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-29 21:38:03,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 22 transitions, 94 flow [2023-08-29 21:38:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:38:03,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:38:03,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 448 transitions. [2023-08-29 21:38:03,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609053497942387 [2023-08-29 21:38:03,075 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 448 transitions. [2023-08-29 21:38:03,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 448 transitions. [2023-08-29 21:38:03,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:03,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 448 transitions. [2023-08-29 21:38:03,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 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 21:38:03,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 243.0) internal successors, (1215), 5 states have internal predecessors, (1215), 0 states have call successors, (0), 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 21:38:03,081 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 243.0) internal successors, (1215), 5 states have internal predecessors, (1215), 0 states have call successors, (0), 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 21:38:03,081 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 70 flow. Second operand 4 states and 448 transitions. [2023-08-29 21:38:03,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 22 transitions, 94 flow [2023-08-29 21:38:03,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 22 transitions, 88 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:38:03,082 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-29 21:38:03,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-29 21:38:03,083 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -15 predicate places. [2023-08-29 21:38:03,084 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-29 21:38:03,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 107.875) internal successors, (863), 8 states have internal predecessors, (863), 0 states have call successors, (0), 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 21:38:03,086 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:38:03,087 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:38:03,088 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:38:03,088 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:38:03,089 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:38:03,089 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:38:03,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 21:38:03,295 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 21:38:03,295 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-29 21:38:03,297 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:38:03,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 129 transitions, 266 flow [2023-08-29 21:38:03,313 INFO L130 PetriNetUnfolder]: 23/178 cut-off events. [2023-08-29 21:38:03,313 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:38:03,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 178 events. 23/178 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 438 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2023-08-29 21:38:03,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 129 transitions, 266 flow [2023-08-29 21:38:03,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 124 transitions, 253 flow [2023-08-29 21:38:03,316 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:38:03,316 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 124 transitions, 253 flow [2023-08-29 21:38:03,316 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 124 transitions, 253 flow [2023-08-29 21:38:03,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 124 transitions, 253 flow [2023-08-29 21:38:03,329 INFO L130 PetriNetUnfolder]: 22/173 cut-off events. [2023-08-29 21:38:03,329 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:38:03,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 173 events. 22/173 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 423 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2023-08-29 21:38:03,332 INFO L119 LiptonReduction]: Number of co-enabled transitions 3080 [2023-08-29 21:38:06,408 INFO L134 LiptonReduction]: Checked pairs total: 5500 [2023-08-29 21:38:06,409 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-29 21:38:06,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:38:06,411 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;@1cb1d67c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:38:06,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:38:06,414 INFO L130 PetriNetUnfolder]: 4/32 cut-off events. [2023-08-29 21:38:06,415 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:38:06,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:06,415 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 21:38:06,415 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:38:06,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:06,415 INFO L85 PathProgramCache]: Analyzing trace with hash 830564393, now seen corresponding path program 1 times [2023-08-29 21:38:06,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:06,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854368434] [2023-08-29 21:38:06,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:06,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:38:06,430 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:38:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:38:06,450 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:38:06,450 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:38:06,450 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:38:06,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:38:06,451 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:38:06,451 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:38:06,452 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:38:06,452 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:38:06,466 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 21:38:06,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 159 transitions, 336 flow [2023-08-29 21:38:06,488 INFO L130 PetriNetUnfolder]: 40/286 cut-off events. [2023-08-29 21:38:06,489 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:38:06,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 286 events. 40/286 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 874 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 180. Up to 9 conditions per place. [2023-08-29 21:38:06,490 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 159 transitions, 336 flow [2023-08-29 21:38:06,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 159 transitions, 336 flow [2023-08-29 21:38:06,492 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:38:06,492 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 159 transitions, 336 flow [2023-08-29 21:38:06,492 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 159 transitions, 336 flow [2023-08-29 21:38:06,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 159 transitions, 336 flow [2023-08-29 21:38:06,521 INFO L130 PetriNetUnfolder]: 40/286 cut-off events. [2023-08-29 21:38:06,522 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:38:06,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 286 events. 40/286 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 874 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 180. Up to 9 conditions per place. [2023-08-29 21:38:06,527 INFO L119 LiptonReduction]: Number of co-enabled transitions 8344 [2023-08-29 21:38:09,373 INFO L134 LiptonReduction]: Checked pairs total: 19423 [2023-08-29 21:38:09,373 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-29 21:38:09,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:38:09,376 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;@1cb1d67c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:38:09,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:38:09,377 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:38:09,377 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:38:09,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:09,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:38:09,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:09,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:09,378 INFO L85 PathProgramCache]: Analyzing trace with hash 29533, now seen corresponding path program 1 times [2023-08-29 21:38:09,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:09,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203954275] [2023-08-29 21:38:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:09,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:09,423 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 21:38:09,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:09,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203954275] [2023-08-29 21:38:09,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203954275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:38:09,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:38:09,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:38:09,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719588648] [2023-08-29 21:38:09,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:38:09,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:38:09,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:09,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:38:09,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:38:09,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 284 [2023-08-29 21:38:09,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 64 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 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 21:38:09,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:09,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 284 [2023-08-29 21:38:09,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:09,776 INFO L130 PetriNetUnfolder]: 2166/3795 cut-off events. [2023-08-29 21:38:09,777 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-29 21:38:09,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7360 conditions, 3795 events. 2166/3795 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 24430 event pairs, 1008 based on Foata normal form. 461/3450 useless extension candidates. Maximal degree in co-relation 983. Up to 3497 conditions per place. [2023-08-29 21:38:09,798 INFO L137 encePairwiseOnDemand]: 264/284 looper letters, 43 selfloop transitions, 2 changer transitions 3/58 dead transitions. [2023-08-29 21:38:09,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 228 flow [2023-08-29 21:38:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:38:09,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:38:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-29 21:38:09,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481220657276995 [2023-08-29 21:38:09,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-29 21:38:09,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-29 21:38:09,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:09,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-29 21:38:09,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 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 21:38:09,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 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 21:38:09,804 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 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 21:38:09,805 INFO L175 Difference]: Start difference. First operand has 51 places, 64 transitions, 146 flow. Second operand 3 states and 467 transitions. [2023-08-29 21:38:09,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 228 flow [2023-08-29 21:38:09,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 58 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:38:09,808 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 122 flow [2023-08-29 21:38:09,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-08-29 21:38:09,812 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-29 21:38:09,812 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 122 flow [2023-08-29 21:38:09,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 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 21:38:09,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:09,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:38:09,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:38:09,813 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:09,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:09,814 INFO L85 PathProgramCache]: Analyzing trace with hash 29531, now seen corresponding path program 1 times [2023-08-29 21:38:09,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:09,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215824516] [2023-08-29 21:38:09,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:09,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:09,856 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 21:38:09,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:09,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215824516] [2023-08-29 21:38:09,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215824516] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:38:09,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:38:09,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:38:09,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201059799] [2023-08-29 21:38:09,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:38:09,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:38:09,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:09,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:38:09,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:38:09,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 284 [2023-08-29 21:38:09,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 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 21:38:09,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:09,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 284 [2023-08-29 21:38:09,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:10,177 INFO L130 PetriNetUnfolder]: 1686/3002 cut-off events. [2023-08-29 21:38:10,177 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2023-08-29 21:38:10,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6062 conditions, 3002 events. 1686/3002 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 18417 event pairs, 1484 based on Foata normal form. 0/2564 useless extension candidates. Maximal degree in co-relation 6001. Up to 2521 conditions per place. [2023-08-29 21:38:10,192 INFO L137 encePairwiseOnDemand]: 280/284 looper letters, 47 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-29 21:38:10,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 244 flow [2023-08-29 21:38:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:38:10,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:38:10,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 437 transitions. [2023-08-29 21:38:10,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5129107981220657 [2023-08-29 21:38:10,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 437 transitions. [2023-08-29 21:38:10,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 437 transitions. [2023-08-29 21:38:10,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:10,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 437 transitions. [2023-08-29 21:38:10,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 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 21:38:10,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 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 21:38:10,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 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 21:38:10,203 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 122 flow. Second operand 3 states and 437 transitions. [2023-08-29 21:38:10,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 244 flow [2023-08-29 21:38:10,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 59 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:38:10,207 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 118 flow [2023-08-29 21:38:10,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-29 21:38:10,209 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2023-08-29 21:38:10,209 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 118 flow [2023-08-29 21:38:10,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 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 21:38:10,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:10,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:38:10,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:38:10,210 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:10,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:10,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1527088145, now seen corresponding path program 1 times [2023-08-29 21:38:10,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:10,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736070199] [2023-08-29 21:38:10,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:10,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:10,287 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 21:38:10,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:10,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736070199] [2023-08-29 21:38:10,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736070199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:38:10,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835465988] [2023-08-29 21:38:10,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:10,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:38:10,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:38:10,290 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 21:38:10,292 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 21:38:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:10,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:38:10,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:38:10,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:38:10,399 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 21:38:10,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:38:10,439 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 21:38:10,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835465988] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:38:10,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:38:10,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:38:10,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840214499] [2023-08-29 21:38:10,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:38:10,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:38:10,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:10,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:38:10,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:38:10,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 284 [2023-08-29 21:38:10,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 118 flow. Second operand has 8 states, 8 states have (on average 129.875) internal successors, (1039), 8 states have internal predecessors, (1039), 0 states have call successors, (0), 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 21:38:10,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:10,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 284 [2023-08-29 21:38:10,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:10,675 INFO L130 PetriNetUnfolder]: 286/532 cut-off events. [2023-08-29 21:38:10,676 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-29 21:38:10,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 532 events. 286/532 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2491 event pairs, 0 based on Foata normal form. 70/601 useless extension candidates. Maximal degree in co-relation 1114. Up to 346 conditions per place. [2023-08-29 21:38:10,677 INFO L137 encePairwiseOnDemand]: 279/284 looper letters, 0 selfloop transitions, 0 changer transitions 51/51 dead transitions. [2023-08-29 21:38:10,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 201 flow [2023-08-29 21:38:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:38:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:38:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 688 transitions. [2023-08-29 21:38:10,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48450704225352115 [2023-08-29 21:38:10,680 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 688 transitions. [2023-08-29 21:38:10,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 688 transitions. [2023-08-29 21:38:10,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:10,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 688 transitions. [2023-08-29 21:38:10,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.6) internal successors, (688), 5 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 21:38:10,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 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 21:38:10,685 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 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 21:38:10,685 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 118 flow. Second operand 5 states and 688 transitions. [2023-08-29 21:38:10,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 201 flow [2023-08-29 21:38:10,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:38:10,686 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-29 21:38:10,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-29 21:38:10,687 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -12 predicate places. [2023-08-29 21:38:10,687 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-29 21:38:10,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 129.875) internal successors, (1039), 8 states have internal predecessors, (1039), 0 states have call successors, (0), 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 21:38:10,688 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:38:10,688 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:38:10,688 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:38:10,688 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:38:10,688 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:38:10,688 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:38:10,698 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 21:38:10,894 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,SelfDestructingSolverStorable6 [2023-08-29 21:38:10,894 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-29 21:38:10,895 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:38:10,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 159 transitions, 336 flow [2023-08-29 21:38:10,917 INFO L130 PetriNetUnfolder]: 40/286 cut-off events. [2023-08-29 21:38:10,918 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:38:10,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 286 events. 40/286 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 874 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 180. Up to 9 conditions per place. [2023-08-29 21:38:10,919 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 159 transitions, 336 flow [2023-08-29 21:38:10,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 159 transitions, 336 flow [2023-08-29 21:38:10,921 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:38:10,921 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 159 transitions, 336 flow [2023-08-29 21:38:10,921 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 159 transitions, 336 flow [2023-08-29 21:38:10,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 159 transitions, 336 flow [2023-08-29 21:38:10,940 INFO L130 PetriNetUnfolder]: 40/286 cut-off events. [2023-08-29 21:38:10,940 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:38:10,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 286 events. 40/286 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 874 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 180. Up to 9 conditions per place. [2023-08-29 21:38:10,946 INFO L119 LiptonReduction]: Number of co-enabled transitions 8344 [2023-08-29 21:38:14,031 INFO L134 LiptonReduction]: Checked pairs total: 19105 [2023-08-29 21:38:14,031 INFO L136 LiptonReduction]: Total number of compositions: 128 [2023-08-29 21:38:14,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:38:14,033 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;@1cb1d67c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:38:14,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:38:14,041 INFO L130 PetriNetUnfolder]: 13/72 cut-off events. [2023-08-29 21:38:14,041 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:38:14,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:14,042 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 21:38:14,042 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:38:14,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:14,043 INFO L85 PathProgramCache]: Analyzing trace with hash 891674205, now seen corresponding path program 1 times [2023-08-29 21:38:14,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:14,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620739020] [2023-08-29 21:38:14,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:14,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:38:14,064 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:38:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:38:14,088 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:38:14,089 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:38:14,089 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:38:14,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:38:14,089 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:38:14,090 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:38:14,090 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:38:14,090 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 21:38:14,114 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 21:38:14,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 189 transitions, 408 flow [2023-08-29 21:38:14,151 INFO L130 PetriNetUnfolder]: 62/435 cut-off events. [2023-08-29 21:38:14,152 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:38:14,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 435 events. 62/435 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1513 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 294. Up to 16 conditions per place. [2023-08-29 21:38:14,155 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 189 transitions, 408 flow [2023-08-29 21:38:14,158 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 189 transitions, 408 flow [2023-08-29 21:38:14,158 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:38:14,158 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 189 transitions, 408 flow [2023-08-29 21:38:14,158 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 189 transitions, 408 flow [2023-08-29 21:38:14,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 189 transitions, 408 flow [2023-08-29 21:38:14,193 INFO L130 PetriNetUnfolder]: 62/435 cut-off events. [2023-08-29 21:38:14,193 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:38:14,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 435 events. 62/435 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1513 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 294. Up to 16 conditions per place. [2023-08-29 21:38:14,208 INFO L119 LiptonReduction]: Number of co-enabled transitions 15120 [2023-08-29 21:38:17,083 INFO L134 LiptonReduction]: Checked pairs total: 37198 [2023-08-29 21:38:17,083 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-08-29 21:38:17,084 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:38:17,085 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;@1cb1d67c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:38:17,085 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:38:17,087 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:38:17,087 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:38:17,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:17,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:38:17,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:17,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:17,087 INFO L85 PathProgramCache]: Analyzing trace with hash 45100, now seen corresponding path program 1 times [2023-08-29 21:38:17,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:17,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043215049] [2023-08-29 21:38:17,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:17,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:17,144 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 21:38:17,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:17,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043215049] [2023-08-29 21:38:17,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043215049] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:38:17,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:38:17,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:38:17,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361782146] [2023-08-29 21:38:17,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:38:17,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:38:17,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:17,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:38:17,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:38:17,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 329 [2023-08-29 21:38:17,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 83 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 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 21:38:17,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:17,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 329 [2023-08-29 21:38:17,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:20,225 INFO L130 PetriNetUnfolder]: 24490/37484 cut-off events. [2023-08-29 21:38:20,225 INFO L131 PetriNetUnfolder]: For 709/709 co-relation queries the response was YES. [2023-08-29 21:38:20,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72706 conditions, 37484 events. 24490/37484 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 1240. Compared 284583 event pairs, 21143 based on Foata normal form. 9044/40141 useless extension candidates. Maximal degree in co-relation 14199. Up to 34655 conditions per place. [2023-08-29 21:38:20,424 INFO L137 encePairwiseOnDemand]: 303/329 looper letters, 51 selfloop transitions, 2 changer transitions 3/71 dead transitions. [2023-08-29 21:38:20,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 71 transitions, 282 flow [2023-08-29 21:38:20,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:38:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:38:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-08-29 21:38:20,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5542046605876393 [2023-08-29 21:38:20,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-08-29 21:38:20,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-08-29 21:38:20,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:20,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-08-29 21:38:20,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 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 21:38:20,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 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 21:38:20,431 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 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 21:38:20,431 INFO L175 Difference]: Start difference. First operand has 65 places, 83 transitions, 196 flow. Second operand 3 states and 547 transitions. [2023-08-29 21:38:20,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 71 transitions, 282 flow [2023-08-29 21:38:20,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 282 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:38:20,435 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 158 flow [2023-08-29 21:38:20,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2023-08-29 21:38:20,435 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-29 21:38:20,436 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 158 flow [2023-08-29 21:38:20,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 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 21:38:20,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:20,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:38:20,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 21:38:20,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:20,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:20,437 INFO L85 PathProgramCache]: Analyzing trace with hash 45102, now seen corresponding path program 1 times [2023-08-29 21:38:20,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:20,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846714843] [2023-08-29 21:38:20,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:20,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:20,464 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 21:38:20,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:20,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846714843] [2023-08-29 21:38:20,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846714843] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:38:20,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:38:20,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:38:20,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3733255] [2023-08-29 21:38:20,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:38:20,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:38:20,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:20,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:38:20,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:38:20,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 329 [2023-08-29 21:38:20,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 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 21:38:20,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:20,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 329 [2023-08-29 21:38:20,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:22,269 INFO L130 PetriNetUnfolder]: 19018/28931 cut-off events. [2023-08-29 21:38:22,270 INFO L131 PetriNetUnfolder]: For 1662/1662 co-relation queries the response was YES. [2023-08-29 21:38:22,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58378 conditions, 28931 events. 19018/28931 cut-off events. For 1662/1662 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 211303 event pairs, 16947 based on Foata normal form. 0/25395 useless extension candidates. Maximal degree in co-relation 58316. Up to 24777 conditions per place. [2023-08-29 21:38:22,563 INFO L137 encePairwiseOnDemand]: 325/329 looper letters, 61 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-29 21:38:22,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 78 transitions, 320 flow [2023-08-29 21:38:22,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:38:22,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:38:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-29 21:38:22,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2023-08-29 21:38:22,566 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-29 21:38:22,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-29 21:38:22,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:22,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-29 21:38:22,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 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 21:38:22,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 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 21:38:22,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 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 21:38:22,570 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 158 flow. Second operand 3 states and 517 transitions. [2023-08-29 21:38:22,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 78 transitions, 320 flow [2023-08-29 21:38:22,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:38:22,580 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 154 flow [2023-08-29 21:38:22,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-29 21:38:22,581 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -2 predicate places. [2023-08-29 21:38:22,581 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 154 flow [2023-08-29 21:38:22,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 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 21:38:22,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:22,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:38:22,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 21:38:22,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:22,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:22,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1260040429, now seen corresponding path program 1 times [2023-08-29 21:38:22,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:22,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96439856] [2023-08-29 21:38:22,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:22,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:22,673 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 21:38:22,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:22,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96439856] [2023-08-29 21:38:22,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96439856] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:38:22,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472016032] [2023-08-29 21:38:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:22,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:38:22,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:38:22,677 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 21:38:22,679 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 21:38:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:22,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:38:22,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:38:22,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:38:22,789 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 21:38:22,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:38:22,822 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 21:38:22,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472016032] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:38:22,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:38:22,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:38:22,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661999454] [2023-08-29 21:38:22,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:38:22,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:38:22,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:22,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:38:22,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:38:22,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 329 [2023-08-29 21:38:22,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 154 flow. Second operand has 7 states, 7 states have (on average 152.71428571428572) internal successors, (1069), 7 states have internal predecessors, (1069), 0 states have call successors, (0), 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 21:38:22,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:22,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 329 [2023-08-29 21:38:22,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:24,553 INFO L130 PetriNetUnfolder]: 18108/26500 cut-off events. [2023-08-29 21:38:24,553 INFO L131 PetriNetUnfolder]: For 1279/1279 co-relation queries the response was YES. [2023-08-29 21:38:24,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54885 conditions, 26500 events. 18108/26500 cut-off events. For 1279/1279 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 183184 event pairs, 3516 based on Foata normal form. 7/24212 useless extension candidates. Maximal degree in co-relation 49770. Up to 20037 conditions per place. [2023-08-29 21:38:24,678 INFO L137 encePairwiseOnDemand]: 323/329 looper letters, 113 selfloop transitions, 6 changer transitions 1/135 dead transitions. [2023-08-29 21:38:24,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 135 transitions, 560 flow [2023-08-29 21:38:24,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:38:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:38:24,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1031 transitions. [2023-08-29 21:38:24,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522289766970618 [2023-08-29 21:38:24,681 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1031 transitions. [2023-08-29 21:38:24,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1031 transitions. [2023-08-29 21:38:24,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:24,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1031 transitions. [2023-08-29 21:38:24,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.83333333333334) internal successors, (1031), 6 states have internal predecessors, (1031), 0 states have call successors, (0), 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 21:38:24,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 0 states have call successors, (0), 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 21:38:24,688 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 0 states have call successors, (0), 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 21:38:24,688 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 154 flow. Second operand 6 states and 1031 transitions. [2023-08-29 21:38:24,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 135 transitions, 560 flow [2023-08-29 21:38:24,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 135 transitions, 554 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:38:24,822 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 170 flow [2023-08-29 21:38:24,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-08-29 21:38:24,823 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-08-29 21:38:24,823 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 170 flow [2023-08-29 21:38:24,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 152.71428571428572) internal successors, (1069), 7 states have internal predecessors, (1069), 0 states have call successors, (0), 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 21:38:24,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:24,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:38:24,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 21:38:25,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:38:25,025 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:25,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:25,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1622779725, now seen corresponding path program 1 times [2023-08-29 21:38:25,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:25,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739012070] [2023-08-29 21:38:25,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:25,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:38:25,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:25,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739012070] [2023-08-29 21:38:25,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739012070] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:38:25,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802435265] [2023-08-29 21:38:25,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:25,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:38:25,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:38:25,127 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 21:38:25,130 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 21:38:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:25,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:38:25,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:38:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:38:25,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:38:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:38:25,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802435265] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:38:25,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:38:25,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-29 21:38:25,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528278776] [2023-08-29 21:38:25,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:38:25,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 21:38:25,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:25,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 21:38:25,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-08-29 21:38:25,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 329 [2023-08-29 21:38:25,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 170 flow. Second operand has 12 states, 12 states have (on average 147.33333333333334) internal successors, (1768), 12 states have internal predecessors, (1768), 0 states have call successors, (0), 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 21:38:25,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:25,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 329 [2023-08-29 21:38:25,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:25,804 INFO L130 PetriNetUnfolder]: 3352/5486 cut-off events. [2023-08-29 21:38:25,804 INFO L131 PetriNetUnfolder]: For 2697/2697 co-relation queries the response was YES. [2023-08-29 21:38:25,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11680 conditions, 5486 events. 3352/5486 cut-off events. For 2697/2697 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 35252 event pairs, 355 based on Foata normal form. 504/5798 useless extension candidates. Maximal degree in co-relation 1291. Up to 3178 conditions per place. [2023-08-29 21:38:25,815 INFO L137 encePairwiseOnDemand]: 325/329 looper letters, 0 selfloop transitions, 0 changer transitions 85/85 dead transitions. [2023-08-29 21:38:25,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 85 transitions, 344 flow [2023-08-29 21:38:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:38:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:38:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 945 transitions. [2023-08-29 21:38:25,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4787234042553192 [2023-08-29 21:38:25,818 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 945 transitions. [2023-08-29 21:38:25,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 945 transitions. [2023-08-29 21:38:25,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:25,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 945 transitions. [2023-08-29 21:38:25,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.5) internal successors, (945), 6 states have internal predecessors, (945), 0 states have call successors, (0), 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 21:38:25,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 0 states have call successors, (0), 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 21:38:25,823 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 0 states have call successors, (0), 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 21:38:25,823 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 170 flow. Second operand 6 states and 945 transitions. [2023-08-29 21:38:25,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 85 transitions, 344 flow [2023-08-29 21:38:25,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 85 transitions, 331 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-29 21:38:25,826 INFO L231 Difference]: Finished difference. Result has 55 places, 0 transitions, 0 flow [2023-08-29 21:38:25,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=55, PETRI_TRANSITIONS=0} [2023-08-29 21:38:25,827 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -10 predicate places. [2023-08-29 21:38:25,827 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 0 transitions, 0 flow [2023-08-29 21:38:25,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.33333333333334) internal successors, (1768), 12 states have internal predecessors, (1768), 0 states have call successors, (0), 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 21:38:25,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:38:25,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:38:25,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:38:25,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:38:25,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:38:25,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:38:25,833 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 21:38:26,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:38:26,033 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-29 21:38:26,033 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:38:26,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 189 transitions, 408 flow [2023-08-29 21:38:26,064 INFO L130 PetriNetUnfolder]: 62/435 cut-off events. [2023-08-29 21:38:26,064 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:38:26,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 435 events. 62/435 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1513 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 294. Up to 16 conditions per place. [2023-08-29 21:38:26,067 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 189 transitions, 408 flow [2023-08-29 21:38:26,069 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 189 transitions, 408 flow [2023-08-29 21:38:26,069 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:38:26,069 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 189 transitions, 408 flow [2023-08-29 21:38:26,069 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 189 transitions, 408 flow [2023-08-29 21:38:26,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 189 transitions, 408 flow [2023-08-29 21:38:26,105 INFO L130 PetriNetUnfolder]: 62/435 cut-off events. [2023-08-29 21:38:26,106 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:38:26,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 435 events. 62/435 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1513 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 294. Up to 16 conditions per place. [2023-08-29 21:38:26,115 INFO L119 LiptonReduction]: Number of co-enabled transitions 15120 [2023-08-29 21:38:29,155 INFO L134 LiptonReduction]: Checked pairs total: 40968 [2023-08-29 21:38:29,156 INFO L136 LiptonReduction]: Total number of compositions: 143 [2023-08-29 21:38:29,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:38:29,157 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;@1cb1d67c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:38:29,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:38:29,162 INFO L130 PetriNetUnfolder]: 23/114 cut-off events. [2023-08-29 21:38:29,162 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 21:38:29,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:29,162 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-29 21:38:29,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:38:29,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:29,162 INFO L85 PathProgramCache]: Analyzing trace with hash -401479404, now seen corresponding path program 1 times [2023-08-29 21:38:29,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:29,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934152276] [2023-08-29 21:38:29,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:29,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:38:29,193 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:38:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:38:29,224 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:38:29,225 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:38:29,225 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:38:29,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 21:38:29,226 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:38:29,227 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:38:29,228 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:38:29,228 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 21:38:29,253 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 21:38:29,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 219 transitions, 482 flow [2023-08-29 21:38:29,314 INFO L130 PetriNetUnfolder]: 96/668 cut-off events. [2023-08-29 21:38:29,315 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:38:29,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 668 events. 96/668 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2725 event pairs, 6 based on Foata normal form. 0/509 useless extension candidates. Maximal degree in co-relation 455. Up to 32 conditions per place. [2023-08-29 21:38:29,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 219 transitions, 482 flow [2023-08-29 21:38:29,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 219 transitions, 482 flow [2023-08-29 21:38:29,323 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:38:29,324 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 219 transitions, 482 flow [2023-08-29 21:38:29,324 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 219 transitions, 482 flow [2023-08-29 21:38:29,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 219 transitions, 482 flow [2023-08-29 21:38:29,379 INFO L130 PetriNetUnfolder]: 96/668 cut-off events. [2023-08-29 21:38:29,380 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:38:29,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 668 events. 96/668 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2725 event pairs, 6 based on Foata normal form. 0/509 useless extension candidates. Maximal degree in co-relation 455. Up to 32 conditions per place. [2023-08-29 21:38:29,399 INFO L119 LiptonReduction]: Number of co-enabled transitions 23632 [2023-08-29 21:38:32,498 INFO L134 LiptonReduction]: Checked pairs total: 68895 [2023-08-29 21:38:32,499 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-29 21:38:32,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:38:32,500 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;@1cb1d67c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:38:32,500 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:38:32,501 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:38:32,501 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:38:32,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:32,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:38:32,501 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:32,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:32,502 INFO L85 PathProgramCache]: Analyzing trace with hash 62723, now seen corresponding path program 1 times [2023-08-29 21:38:32,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:32,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280297561] [2023-08-29 21:38:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:32,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:32,587 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 21:38:32,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:32,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280297561] [2023-08-29 21:38:32,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280297561] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:38:32,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:38:32,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:38:32,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061865343] [2023-08-29 21:38:32,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:38:32,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:38:32,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:32,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:38:32,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:38:32,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 377 [2023-08-29 21:38:32,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 100 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 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 21:38:32,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:32,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 377 [2023-08-29 21:38:32,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:39:11,554 INFO L130 PetriNetUnfolder]: 429340/594073 cut-off events. [2023-08-29 21:39:11,554 INFO L131 PetriNetUnfolder]: For 14614/14614 co-relation queries the response was YES. [2023-08-29 21:39:12,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161049 conditions, 594073 events. 429340/594073 cut-off events. For 14614/14614 co-relation queries the response was YES. Maximal size of possible extension queue 12980. Compared 4821515 event pairs, 408072 based on Foata normal form. 96328/615765 useless extension candidates. Maximal degree in co-relation 100325. Up to 558770 conditions per place. [2023-08-29 21:39:14,477 INFO L137 encePairwiseOnDemand]: 346/377 looper letters, 66 selfloop transitions, 2 changer transitions 2/85 dead transitions. [2023-08-29 21:39:14,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 85 transitions, 352 flow [2023-08-29 21:39:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:39:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:39:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2023-08-29 21:39:14,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587975243147657 [2023-08-29 21:39:14,480 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2023-08-29 21:39:14,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2023-08-29 21:39:14,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:39:14,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2023-08-29 21:39:14,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 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 21:39:14,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 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 21:39:14,484 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 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 21:39:14,484 INFO L175 Difference]: Start difference. First operand has 78 places, 100 transitions, 244 flow. Second operand 3 states and 632 transitions. [2023-08-29 21:39:14,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 85 transitions, 352 flow [2023-08-29 21:39:14,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 85 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:39:14,490 INFO L231 Difference]: Finished difference. Result has 81 places, 73 transitions, 196 flow [2023-08-29 21:39:14,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=81, PETRI_TRANSITIONS=73} [2023-08-29 21:39:14,491 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2023-08-29 21:39:14,491 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 73 transitions, 196 flow [2023-08-29 21:39:14,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 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 21:39:14,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:14,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:39:14,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 21:39:14,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:39:14,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:14,492 INFO L85 PathProgramCache]: Analyzing trace with hash 62725, now seen corresponding path program 1 times [2023-08-29 21:39:14,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:14,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345354648] [2023-08-29 21:39:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:14,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:14,524 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 21:39:14,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:39:14,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345354648] [2023-08-29 21:39:14,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345354648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:39:14,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:39:14,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:39:14,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806809249] [2023-08-29 21:39:14,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:39:14,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:39:14,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:39:14,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:39:14,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:39:14,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 377 [2023-08-29 21:39:14,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 73 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 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 21:39:14,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:39:14,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 377 [2023-08-29 21:39:14,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:39:46,681 INFO L130 PetriNetUnfolder]: 349614/481986 cut-off events. [2023-08-29 21:39:46,681 INFO L131 PetriNetUnfolder]: For 26140/26140 co-relation queries the response was YES. [2023-08-29 21:39:47,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 970061 conditions, 481986 events. 349614/481986 cut-off events. For 26140/26140 co-relation queries the response was YES. Maximal size of possible extension queue 10607. Compared 3819862 event pairs, 313434 based on Foata normal form. 0/439594 useless extension candidates. Maximal degree in co-relation 969988. Up to 416884 conditions per place. [2023-08-29 21:39:50,133 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 85 selfloop transitions, 2 changer transitions 0/102 dead transitions. [2023-08-29 21:39:50,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 102 transitions, 428 flow [2023-08-29 21:39:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:39:50,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:39:50,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2023-08-29 21:39:50,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366931918656057 [2023-08-29 21:39:50,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2023-08-29 21:39:50,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2023-08-29 21:39:50,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:39:50,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2023-08-29 21:39:50,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 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 21:39:50,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 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 21:39:50,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 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 21:39:50,163 INFO L175 Difference]: Start difference. First operand has 81 places, 73 transitions, 196 flow. Second operand 3 states and 607 transitions. [2023-08-29 21:39:50,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 102 transitions, 428 flow [2023-08-29 21:39:50,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 102 transitions, 424 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:39:50,302 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 192 flow [2023-08-29 21:39:50,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2023-08-29 21:39:50,302 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2023-08-29 21:39:50,303 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 192 flow [2023-08-29 21:39:50,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 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 21:39:50,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:50,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:39:50,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 21:39:50,303 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:39:50,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:50,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2146557541, now seen corresponding path program 1 times [2023-08-29 21:39:50,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:50,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490538370] [2023-08-29 21:39:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:50,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:50,402 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 21:39:50,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:39:50,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490538370] [2023-08-29 21:39:50,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490538370] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:39:50,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329258939] [2023-08-29 21:39:50,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:50,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:39:50,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:39:50,425 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 21:39:50,448 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 21:39:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:50,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:39:50,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:39:50,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:39:50,565 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 21:39:50,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:39:50,609 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 21:39:50,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329258939] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:39:50,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:39:50,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:39:50,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493809690] [2023-08-29 21:39:50,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:39:50,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:39:50,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:39:50,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:39:50,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:39:50,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 377 [2023-08-29 21:39:50,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 192 flow. Second operand has 7 states, 7 states have (on average 174.71428571428572) internal successors, (1223), 7 states have internal predecessors, (1223), 0 states have call successors, (0), 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 21:39:50,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:39:50,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 377 [2023-08-29 21:39:50,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:40:16,591 INFO L130 PetriNetUnfolder]: 355314/470363 cut-off events. [2023-08-29 21:40:16,592 INFO L131 PetriNetUnfolder]: For 14816/14816 co-relation queries the response was YES. [2023-08-29 21:40:17,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 975505 conditions, 470363 events. 355314/470363 cut-off events. For 14816/14816 co-relation queries the response was YES. Maximal size of possible extension queue 10229. Compared 3487141 event pairs, 11595 based on Foata normal form. 9/441390 useless extension candidates. Maximal degree in co-relation 888293. Up to 380774 conditions per place. [2023-08-29 21:40:19,067 INFO L137 encePairwiseOnDemand]: 370/377 looper letters, 161 selfloop transitions, 7 changer transitions 1/184 dead transitions. [2023-08-29 21:40:19,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 184 transitions, 787 flow [2023-08-29 21:40:19,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:40:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:40:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1212 transitions. [2023-08-29 21:40:19,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358090185676393 [2023-08-29 21:40:19,069 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1212 transitions. [2023-08-29 21:40:19,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1212 transitions. [2023-08-29 21:40:19,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:40:19,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1212 transitions. [2023-08-29 21:40:19,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 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 21:40:19,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 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 21:40:19,074 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 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 21:40:19,074 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 192 flow. Second operand 6 states and 1212 transitions. [2023-08-29 21:40:19,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 184 transitions, 787 flow [2023-08-29 21:40:37,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 184 transitions, 779 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:40:37,707 INFO L231 Difference]: Finished difference. Result has 84 places, 75 transitions, 240 flow [2023-08-29 21:40:37,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2023-08-29 21:40:37,708 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 6 predicate places. [2023-08-29 21:40:37,708 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 240 flow [2023-08-29 21:40:37,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 174.71428571428572) internal successors, (1223), 7 states have internal predecessors, (1223), 0 states have call successors, (0), 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 21:40:37,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:40:37,709 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:40:37,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-29 21:40:37,909 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,SelfDestructingSolverStorable15 [2023-08-29 21:40:37,909 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:40:37,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:40:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash -458564946, now seen corresponding path program 1 times [2023-08-29 21:40:37,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:40:37,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839870961] [2023-08-29 21:40:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:37,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:40:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:40:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:40:37,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:40:37,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839870961] [2023-08-29 21:40:37,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839870961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:40:37,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886554826] [2023-08-29 21:40:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:37,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:40:37,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:40:37,986 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 21:40:37,993 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 21:40:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:40:38,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:40:38,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:40:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:40:38,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:40:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:40:38,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886554826] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:40:38,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:40:38,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-29 21:40:38,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156325250] [2023-08-29 21:40:38,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:40:38,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 21:40:38,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:40:38,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 21:40:38,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-08-29 21:40:38,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 377 [2023-08-29 21:40:38,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 240 flow. Second operand has 12 states, 12 states have (on average 169.33333333333334) internal successors, (2032), 12 states have internal predecessors, (2032), 0 states have call successors, (0), 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 21:40:38,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:40:38,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 377 [2023-08-29 21:40:38,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:40:42,473 INFO L130 PetriNetUnfolder]: 61747/84352 cut-off events. [2023-08-29 21:40:42,474 INFO L131 PetriNetUnfolder]: For 49806/49806 co-relation queries the response was YES. [2023-08-29 21:40:42,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212538 conditions, 84352 events. 61747/84352 cut-off events. For 49806/49806 co-relation queries the response was YES. Maximal size of possible extension queue 2177. Compared 561200 event pairs, 567 based on Foata normal form. 6561/90885 useless extension candidates. Maximal degree in co-relation 19720. Up to 52974 conditions per place. [2023-08-29 21:40:43,043 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 118 selfloop transitions, 5 changer transitions 0/137 dead transitions. [2023-08-29 21:40:43,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 137 transitions, 587 flow [2023-08-29 21:40:43,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:40:43,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:40:43,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1298 transitions. [2023-08-29 21:40:43,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49185297461159533 [2023-08-29 21:40:43,046 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1298 transitions. [2023-08-29 21:40:43,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1298 transitions. [2023-08-29 21:40:43,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:40:43,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1298 transitions. [2023-08-29 21:40:43,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.42857142857142) internal successors, (1298), 7 states have internal predecessors, (1298), 0 states have call successors, (0), 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 21:40:43,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 377.0) internal successors, (3016), 8 states have internal predecessors, (3016), 0 states have call successors, (0), 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 21:40:43,051 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 377.0) internal successors, (3016), 8 states have internal predecessors, (3016), 0 states have call successors, (0), 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 21:40:43,051 INFO L175 Difference]: Start difference. First operand has 84 places, 75 transitions, 240 flow. Second operand 7 states and 1298 transitions. [2023-08-29 21:40:43,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 137 transitions, 587 flow [2023-08-29 21:40:43,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 137 transitions, 570 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-29 21:40:43,159 INFO L231 Difference]: Finished difference. Result has 75 places, 56 transitions, 166 flow [2023-08-29 21:40:43,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=56} [2023-08-29 21:40:43,160 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2023-08-29 21:40:43,160 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 56 transitions, 166 flow [2023-08-29 21:40:43,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.33333333333334) internal successors, (2032), 12 states have internal predecessors, (2032), 0 states have call successors, (0), 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 21:40:43,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:40:43,161 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 21:40:43,168 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 21:40:43,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-29 21:40:43,368 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:40:43,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:40:43,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2051993797, now seen corresponding path program 1 times [2023-08-29 21:40:43,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:40:43,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708707739] [2023-08-29 21:40:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:43,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:40:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:40:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:40:43,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:40:43,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708707739] [2023-08-29 21:40:43,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708707739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:40:43,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543499911] [2023-08-29 21:40:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:43,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:40:43,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:40:43,550 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 21:40:43,555 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 21:40:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:40:43,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 21:40:43,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:40:43,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:40:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:40:43,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:40:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:40:43,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543499911] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:40:43,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:40:43,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-29 21:40:43,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774559270] [2023-08-29 21:40:43,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:40:43,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 21:40:43,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:40:43,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 21:40:43,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2023-08-29 21:40:44,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 377 [2023-08-29 21:40:44,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 56 transitions, 166 flow. Second operand has 16 states, 16 states have (on average 175.4375) internal successors, (2807), 16 states have internal predecessors, (2807), 0 states have call successors, (0), 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 21:40:44,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:40:44,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 377 [2023-08-29 21:40:44,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:40:47,677 INFO L130 PetriNetUnfolder]: 41092/57865 cut-off events. [2023-08-29 21:40:47,677 INFO L131 PetriNetUnfolder]: For 57177/57177 co-relation queries the response was YES. [2023-08-29 21:40:47,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129035 conditions, 57865 events. 41092/57865 cut-off events. For 57177/57177 co-relation queries the response was YES. Maximal size of possible extension queue 1552. Compared 387852 event pairs, 567 based on Foata normal form. 5832/63669 useless extension candidates. Maximal degree in co-relation 14672. Up to 26487 conditions per place. [2023-08-29 21:40:47,906 INFO L137 encePairwiseOnDemand]: 374/377 looper letters, 0 selfloop transitions, 0 changer transitions 136/136 dead transitions. [2023-08-29 21:40:47,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 136 transitions, 568 flow [2023-08-29 21:40:47,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:40:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:40:47,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1334 transitions. [2023-08-29 21:40:47,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054945054945055 [2023-08-29 21:40:47,909 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1334 transitions. [2023-08-29 21:40:47,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1334 transitions. [2023-08-29 21:40:47,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:40:47,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1334 transitions. [2023-08-29 21:40:47,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 190.57142857142858) internal successors, (1334), 7 states have internal predecessors, (1334), 0 states have call successors, (0), 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 21:40:47,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 377.0) internal successors, (3016), 8 states have internal predecessors, (3016), 0 states have call successors, (0), 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 21:40:47,914 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 377.0) internal successors, (3016), 8 states have internal predecessors, (3016), 0 states have call successors, (0), 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 21:40:47,914 INFO L175 Difference]: Start difference. First operand has 75 places, 56 transitions, 166 flow. Second operand 7 states and 1334 transitions. [2023-08-29 21:40:47,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 136 transitions, 568 flow [2023-08-29 21:40:47,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 136 transitions, 551 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-29 21:40:47,927 INFO L231 Difference]: Finished difference. Result has 71 places, 0 transitions, 0 flow [2023-08-29 21:40:47,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=71, PETRI_TRANSITIONS=0} [2023-08-29 21:40:47,928 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -7 predicate places. [2023-08-29 21:40:47,928 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 0 transitions, 0 flow [2023-08-29 21:40:47,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 175.4375) internal successors, (2807), 16 states have internal predecessors, (2807), 0 states have call successors, (0), 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 21:40:47,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:40:47,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:40:47,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:40:47,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:40:47,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:40:47,930 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:40:47,936 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 21:40:48,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:40:48,135 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-29 21:40:48,135 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:40:48,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 219 transitions, 482 flow [2023-08-29 21:40:48,184 INFO L130 PetriNetUnfolder]: 96/668 cut-off events. [2023-08-29 21:40:48,184 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:40:48,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 668 events. 96/668 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2725 event pairs, 6 based on Foata normal form. 0/509 useless extension candidates. Maximal degree in co-relation 455. Up to 32 conditions per place. [2023-08-29 21:40:48,189 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 219 transitions, 482 flow [2023-08-29 21:40:48,191 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 219 transitions, 482 flow [2023-08-29 21:40:48,191 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:40:48,191 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 219 transitions, 482 flow [2023-08-29 21:40:48,192 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 219 transitions, 482 flow [2023-08-29 21:40:48,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 219 transitions, 482 flow [2023-08-29 21:40:48,230 INFO L130 PetriNetUnfolder]: 96/668 cut-off events. [2023-08-29 21:40:48,230 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:40:48,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 668 events. 96/668 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2725 event pairs, 6 based on Foata normal form. 0/509 useless extension candidates. Maximal degree in co-relation 455. Up to 32 conditions per place. [2023-08-29 21:40:48,244 INFO L119 LiptonReduction]: Number of co-enabled transitions 23632 [2023-08-29 21:40:51,033 INFO L134 LiptonReduction]: Checked pairs total: 62391 [2023-08-29 21:40:51,033 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-29 21:40:51,034 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:40:51,034 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;@1cb1d67c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:40:51,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:40:51,042 INFO L130 PetriNetUnfolder]: 38/173 cut-off events. [2023-08-29 21:40:51,042 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-29 21:40:51,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:40:51,042 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 21:40:51,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:40:51,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:40:51,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1650382520, now seen corresponding path program 1 times [2023-08-29 21:40:51,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:40:51,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190033942] [2023-08-29 21:40:51,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:51,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:40:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:40:51,054 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:40:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:40:51,066 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:40:51,067 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:40:51,067 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:40:51,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 21:40:51,067 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:40:51,068 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:40:51,068 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:40:51,068 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-29 21:40:51,086 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-29 21:40:51,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 249 transitions, 558 flow [2023-08-29 21:40:51,197 INFO L130 PetriNetUnfolder]: 158/1073 cut-off events. [2023-08-29 21:40:51,198 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 21:40:51,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1184 conditions, 1073 events. 158/1073 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5216 event pairs, 23 based on Foata normal form. 0/817 useless extension candidates. Maximal degree in co-relation 713. Up to 80 conditions per place. [2023-08-29 21:40:51,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 249 transitions, 558 flow [2023-08-29 21:40:51,220 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 249 transitions, 558 flow [2023-08-29 21:40:51,220 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:40:51,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 249 transitions, 558 flow [2023-08-29 21:40:51,221 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 249 transitions, 558 flow [2023-08-29 21:40:51,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 249 transitions, 558 flow [2023-08-29 21:40:51,353 INFO L130 PetriNetUnfolder]: 158/1073 cut-off events. [2023-08-29 21:40:51,353 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 21:40:51,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1184 conditions, 1073 events. 158/1073 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5216 event pairs, 23 based on Foata normal form. 0/817 useless extension candidates. Maximal degree in co-relation 713. Up to 80 conditions per place. [2023-08-29 21:40:51,398 INFO L119 LiptonReduction]: Number of co-enabled transitions 33880 [2023-08-29 21:40:54,564 INFO L134 LiptonReduction]: Checked pairs total: 103475 [2023-08-29 21:40:54,564 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-08-29 21:40:54,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:40:54,565 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;@1cb1d67c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:40:54,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:40:54,567 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:40:54,567 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:40:54,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:40:54,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:40:54,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:40:54,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:40:54,567 INFO L85 PathProgramCache]: Analyzing trace with hash 82066, now seen corresponding path program 1 times [2023-08-29 21:40:54,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:40:54,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721551797] [2023-08-29 21:40:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:54,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:40:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:40:54,604 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 21:40:54,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:40:54,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721551797] [2023-08-29 21:40:54,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721551797] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:40:54,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:40:54,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:40:54,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169563716] [2023-08-29 21:40:54,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:40:54,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:40:54,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:40:54,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:40:54,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:40:54,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 419 [2023-08-29 21:40:54,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 121 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 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 21:40:54,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:40:54,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 419 [2023-08-29 21:40:54,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand