./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.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 --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 ec355916cf6ee76d4008e84bb2b3ecc632256e3b320d2f47b453f4ca1f46acbc --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:21:48,678 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:21:48,798 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:21:48,802 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:21:48,807 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:21:48,850 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:21:48,856 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:21:48,857 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:21:48,857 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:21:48,858 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:21:48,858 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:21:48,858 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:21:48,859 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:21:48,859 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:21:48,859 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:21:48,859 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:21:48,860 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:21:48,860 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:21:48,864 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:21:48,864 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:21:48,865 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:21:48,865 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:21:48,865 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:21:48,866 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:21:48,866 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:21:48,866 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:21:48,867 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:21:48,867 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:21:48,867 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:21:48,867 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:21:48,868 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:21:48,868 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:21:48,868 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:21:48,869 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:21:48,869 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:21:48,869 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:21:48,869 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:21:48,870 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:21:48,870 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:21:48,870 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:21:48,870 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:21:48,874 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:21:48,874 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec355916cf6ee76d4008e84bb2b3ecc632256e3b320d2f47b453f4ca1f46acbc [2024-11-19 09:21:49,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:21:49,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:21:49,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:21:49,277 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:21:49,278 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:21:49,279 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i [2024-11-19 09:21:51,342 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:21:51,592 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:21:51,596 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i [2024-11-19 09:21:51,622 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37ba835dd/cfa39dc60ea2499c9af5404c6156aa64/FLAGd4d9a2c2b [2024-11-19 09:21:51,637 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37ba835dd/cfa39dc60ea2499c9af5404c6156aa64 [2024-11-19 09:21:51,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:21:51,641 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:21:51,647 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:21:51,647 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:21:51,652 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:21:51,656 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:21:51" (1/1) ... [2024-11-19 09:21:51,661 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b0c0873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:21:51, skipping insertion in model container [2024-11-19 09:21:51,661 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:21:51" (1/1) ... [2024-11-19 09:21:51,707 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:21:52,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:21:52,079 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:21:52,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:21:52,205 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:21:52,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:21:52 WrapperNode [2024-11-19 09:21:52,206 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:21:52,207 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:21:52,207 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:21:52,211 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:21:52,223 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:21:52" (1/1) ... [2024-11-19 09:21:52,242 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:21:52" (1/1) ... [2024-11-19 09:21:52,278 INFO L138 Inliner]: procedures = 164, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 98 [2024-11-19 09:21:52,285 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:21:52,286 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:21:52,286 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:21:52,286 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:21:52,304 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:21:52" (1/1) ... [2024-11-19 09:21:52,304 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:21:52" (1/1) ... [2024-11-19 09:21:52,307 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:21:52" (1/1) ... [2024-11-19 09:21:52,343 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 5, 8]. 53 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6]. The 1 writes are split as follows [0, 0, 1]. [2024-11-19 09:21:52,344 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:21:52" (1/1) ... [2024-11-19 09:21:52,344 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:21:52" (1/1) ... [2024-11-19 09:21:52,355 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:21:52" (1/1) ... [2024-11-19 09:21:52,369 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:21:52" (1/1) ... [2024-11-19 09:21:52,376 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:21:52" (1/1) ... [2024-11-19 09:21:52,378 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:21:52" (1/1) ... [2024-11-19 09:21:52,385 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:21:52,389 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:21:52,393 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:21:52,393 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:21:52,398 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:21:52" (1/1) ... [2024-11-19 09:21:52,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:21:52,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:21:52,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 09:21:52,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 09:21:52,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:21:52,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:21:52,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 09:21:52,559 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-19 09:21:52,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-19 09:21:52,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:21:52,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:21:52,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 09:21:52,559 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-19 09:21:52,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:21:52,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:21:52,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:21:52,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 09:21:52,561 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-19 09:21:52,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:21:52,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:21:52,562 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:21:52,718 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:21:52,720 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:21:52,904 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:21:52,905 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:21:52,996 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:21:52,996 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 09:21:52,996 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:21:52 BoogieIcfgContainer [2024-11-19 09:21:52,996 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:21:52,998 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:21:52,998 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:21:53,000 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:21:53,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:21:51" (1/3) ... [2024-11-19 09:21:53,001 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba86b38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:21:53, skipping insertion in model container [2024-11-19 09:21:53,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:21:52" (2/3) ... [2024-11-19 09:21:53,002 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba86b38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:21:53, skipping insertion in model container [2024-11-19 09:21:53,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:21:52" (3/3) ... [2024-11-19 09:21:53,003 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt.i [2024-11-19 09:21:53,016 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:21:53,016 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-11-19 09:21:53,016 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:21:53,054 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 09:21:53,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 37 transitions, 78 flow [2024-11-19 09:21:53,110 INFO L124 PetriNetUnfolderBase]: 5/41 cut-off events. [2024-11-19 09:21:53,110 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:21:53,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 41 events. 5/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 81 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-11-19 09:21:53,114 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 37 transitions, 78 flow [2024-11-19 09:21:53,117 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 37 transitions, 78 flow [2024-11-19 09:21:53,124 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:21:53,130 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@29f1e06c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:21:53,130 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-11-19 09:21:53,133 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:21:53,133 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:21:53,133 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:21:53,133 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:53,134 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:21:53,134 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-19 09:21:53,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:53,138 INFO L85 PathProgramCache]: Analyzing trace with hash 315512, now seen corresponding path program 1 times [2024-11-19 09:21:53,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:53,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286249560] [2024-11-19 09:21:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:53,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:21:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:53,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:21:53,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286249560] [2024-11-19 09:21:53,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286249560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:21:53,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:21:53,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:21:53,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675424058] [2024-11-19 09:21:53,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:21:53,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:21:53,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:21:53,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:21:53,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:21:53,477 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-19 09:21:53,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:53,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:21:53,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-19 09:21:53,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:21:53,551 INFO L124 PetriNetUnfolderBase]: 25/88 cut-off events. [2024-11-19 09:21:53,553 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:21:53,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 88 events. 25/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 239 event pairs, 18 based on Foata normal form. 6/90 useless extension candidates. Maximal degree in co-relation 130. Up to 56 conditions per place. [2024-11-19 09:21:53,556 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 16 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2024-11-19 09:21:53,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 96 flow [2024-11-19 09:21:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:21:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:21:53,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-11-19 09:21:53,565 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5495495495495496 [2024-11-19 09:21:53,567 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 78 flow. Second operand 3 states and 61 transitions. [2024-11-19 09:21:53,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 96 flow [2024-11-19 09:21:53,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 96 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 09:21:53,575 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 64 flow [2024-11-19 09:21:53,577 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-11-19 09:21:53,581 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -4 predicate places. [2024-11-19 09:21:53,581 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 64 flow [2024-11-19 09:21:53,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:53,582 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:53,582 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:21:53,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:21:53,582 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-19 09:21:53,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:53,583 INFO L85 PathProgramCache]: Analyzing trace with hash 315513, now seen corresponding path program 1 times [2024-11-19 09:21:53,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:53,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689689479] [2024-11-19 09:21:53,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:53,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:21:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:53,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:21:53,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689689479] [2024-11-19 09:21:53,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689689479] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:21:53,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:21:53,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:21:53,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393630642] [2024-11-19 09:21:53,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:21:53,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:21:53,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:21:53,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:21:53,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:21:53,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-19 09:21:53,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:53,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:21:53,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-19 09:21:53,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:21:53,794 INFO L124 PetriNetUnfolderBase]: 25/90 cut-off events. [2024-11-19 09:21:53,795 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:21:53,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 90 events. 25/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 239 event pairs, 18 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 149. Up to 58 conditions per place. [2024-11-19 09:21:53,796 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 18 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-11-19 09:21:53,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 31 transitions, 108 flow [2024-11-19 09:21:53,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:21:53,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:21:53,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-11-19 09:21:53,798 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5765765765765766 [2024-11-19 09:21:53,798 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 64 flow. Second operand 3 states and 64 transitions. [2024-11-19 09:21:53,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 31 transitions, 108 flow [2024-11-19 09:21:53,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:21:53,800 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 77 flow [2024-11-19 09:21:53,800 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-11-19 09:21:53,801 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -2 predicate places. [2024-11-19 09:21:53,801 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 77 flow [2024-11-19 09:21:53,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:53,801 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:53,802 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:21:53,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:21:53,802 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-19 09:21:53,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:53,806 INFO L85 PathProgramCache]: Analyzing trace with hash 303217908, now seen corresponding path program 1 times [2024-11-19 09:21:53,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:53,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96362972] [2024-11-19 09:21:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:53,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:21:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:53,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:21:53,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96362972] [2024-11-19 09:21:53,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96362972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:21:53,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916424845] [2024-11-19 09:21:53,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:53,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:21:53,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:21:53,924 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) [2024-11-19 09:21:53,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:21:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:21:53,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 09:21:53,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:21:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:54,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:21:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:54,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916424845] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:21:54,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:21:54,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-11-19 09:21:54,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628906589] [2024-11-19 09:21:54,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:21:54,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:21:54,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:21:54,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:21:54,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:21:54,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-19 09:21:54,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 77 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:54,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:21:54,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-19 09:21:54,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:21:54,250 INFO L124 PetriNetUnfolderBase]: 27/98 cut-off events. [2024-11-19 09:21:54,250 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:21:54,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 98 events. 27/98 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 263 event pairs, 18 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 175. Up to 60 conditions per place. [2024-11-19 09:21:54,251 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 21 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2024-11-19 09:21:54,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 39 transitions, 161 flow [2024-11-19 09:21:54,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:21:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:21:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-11-19 09:21:54,253 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5225225225225225 [2024-11-19 09:21:54,253 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 77 flow. Second operand 6 states and 116 transitions. [2024-11-19 09:21:54,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 39 transitions, 161 flow [2024-11-19 09:21:54,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:21:54,254 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 127 flow [2024-11-19 09:21:54,254 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2024-11-19 09:21:54,255 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2024-11-19 09:21:54,255 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 127 flow [2024-11-19 09:21:54,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:54,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:54,256 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2024-11-19 09:21:54,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:21:54,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:21:54,461 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-19 09:21:54,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:54,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1614088245, now seen corresponding path program 1 times [2024-11-19 09:21:54,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:54,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643153805] [2024-11-19 09:21:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:54,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:21:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:21:54,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:21:54,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643153805] [2024-11-19 09:21:54,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643153805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:21:54,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81932300] [2024-11-19 09:21:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:54,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:21:54,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:21:54,545 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) [2024-11-19 09:21:54,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:21:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:21:54,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 09:21:54,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:21:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:21:54,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:21:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:21:54,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81932300] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:21:54,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:21:54,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-19 09:21:54,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848460638] [2024-11-19 09:21:54,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:21:54,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:21:54,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:21:54,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:21:54,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:21:54,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-11-19 09:21:54,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 127 flow. Second operand has 9 states, 9 states have (on average 17.0) internal successors, (153), 9 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:54,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:21:54,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-11-19 09:21:54,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:21:54,740 INFO L124 PetriNetUnfolderBase]: 25/100 cut-off events. [2024-11-19 09:21:54,740 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-19 09:21:54,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 100 events. 25/100 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 238 event pairs, 18 based on Foata normal form. 4/101 useless extension candidates. Maximal degree in co-relation 192. Up to 55 conditions per place. [2024-11-19 09:21:54,741 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 20 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2024-11-19 09:21:54,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 187 flow [2024-11-19 09:21:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:21:54,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:21:54,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-11-19 09:21:54,743 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5135135135135135 [2024-11-19 09:21:54,743 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 127 flow. Second operand 8 states and 152 transitions. [2024-11-19 09:21:54,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 187 flow [2024-11-19 09:21:54,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 179 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-19 09:21:54,744 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 143 flow [2024-11-19 09:21:54,745 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=143, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2024-11-19 09:21:54,747 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2024-11-19 09:21:54,748 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 143 flow [2024-11-19 09:21:54,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.0) internal successors, (153), 9 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:54,748 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:54,748 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-19 09:21:54,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 09:21:54,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-19 09:21:54,955 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-19 09:21:54,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:54,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1574965733, now seen corresponding path program 2 times [2024-11-19 09:21:54,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:54,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202506598] [2024-11-19 09:21:54,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:21:54,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:54,975 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:21:54,975 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:21:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:55,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:21:55,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202506598] [2024-11-19 09:21:55,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202506598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:21:55,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917647223] [2024-11-19 09:21:55,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:21:55,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:21:55,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:21:55,248 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) [2024-11-19 09:21:55,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:21:55,305 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:21:55,305 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:21:55,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:21:55,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:21:55,494 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:55,494 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:21:55,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917647223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:21:55,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:21:55,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-11-19 09:21:55,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981077819] [2024-11-19 09:21:55,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:21:55,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:21:55,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:21:55,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:21:55,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:21:55,524 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-19 09:21:55,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 143 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:55,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:21:55,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-19 09:21:55,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:21:55,589 INFO L124 PetriNetUnfolderBase]: 25/98 cut-off events. [2024-11-19 09:21:55,589 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-19 09:21:55,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 98 events. 25/98 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 236 event pairs, 18 based on Foata normal form. 2/97 useless extension candidates. Maximal degree in co-relation 197. Up to 54 conditions per place. [2024-11-19 09:21:55,589 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 17 selfloop transitions, 10 changer transitions 0/38 dead transitions. [2024-11-19 09:21:55,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 38 transitions, 203 flow [2024-11-19 09:21:55,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:21:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:21:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-11-19 09:21:55,593 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46621621621621623 [2024-11-19 09:21:55,593 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 143 flow. Second operand 8 states and 138 transitions. [2024-11-19 09:21:55,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 38 transitions, 203 flow [2024-11-19 09:21:55,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 38 transitions, 177 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-11-19 09:21:55,595 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 139 flow [2024-11-19 09:21:55,595 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=139, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2024-11-19 09:21:55,597 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 13 predicate places. [2024-11-19 09:21:55,597 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 139 flow [2024-11-19 09:21:55,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:55,598 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:55,598 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1] [2024-11-19 09:21:55,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:21:55,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:21:55,799 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-19 09:21:55,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:55,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1608639071, now seen corresponding path program 2 times [2024-11-19 09:21:55,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:55,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514462917] [2024-11-19 09:21:55,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:21:55,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:55,827 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:21:55,827 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-19 09:21:55,827 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 09:21:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:21:55,862 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 09:21:55,863 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 09:21:55,863 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2024-11-19 09:21:55,865 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2024-11-19 09:21:55,865 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2024-11-19 09:21:55,865 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2024-11-19 09:21:55,865 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2024-11-19 09:21:55,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2024-11-19 09:21:55,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2024-11-19 09:21:55,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2024-11-19 09:21:55,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2024-11-19 09:21:55,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2024-11-19 09:21:55,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:21:55,867 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2024-11-19 09:21:55,868 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 09:21:55,868 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-19 09:21:55,884 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 09:21:55,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 62 transitions, 134 flow [2024-11-19 09:21:55,891 INFO L124 PetriNetUnfolderBase]: 9/71 cut-off events. [2024-11-19 09:21:55,891 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:21:55,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 71 events. 9/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 202 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 53. Up to 3 conditions per place. [2024-11-19 09:21:55,891 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 62 transitions, 134 flow [2024-11-19 09:21:55,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 62 transitions, 134 flow [2024-11-19 09:21:55,893 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:21:55,893 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@29f1e06c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:21:55,893 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-11-19 09:21:55,894 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:21:55,894 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:21:55,894 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:21:55,894 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:55,895 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:21:55,895 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-19 09:21:55,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:55,895 INFO L85 PathProgramCache]: Analyzing trace with hash 377078, now seen corresponding path program 1 times [2024-11-19 09:21:55,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:55,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498822100] [2024-11-19 09:21:55,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:55,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:21:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:55,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:21:55,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498822100] [2024-11-19 09:21:55,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498822100] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:21:55,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:21:55,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:21:55,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039101406] [2024-11-19 09:21:55,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:21:55,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:21:55,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:21:55,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:21:55,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:21:55,929 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2024-11-19 09:21:55,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 62 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:55,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:21:55,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2024-11-19 09:21:55,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:21:56,066 INFO L124 PetriNetUnfolderBase]: 548/1213 cut-off events. [2024-11-19 09:21:56,067 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-19 09:21:56,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2115 conditions, 1213 events. 548/1213 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7076 event pairs, 468 based on Foata normal form. 182/1336 useless extension candidates. Maximal degree in co-relation 1288. Up to 866 conditions per place. [2024-11-19 09:21:56,074 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 27 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2024-11-19 09:21:56,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 50 transitions, 166 flow [2024-11-19 09:21:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:21:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:21:56,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-11-19 09:21:56,075 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2024-11-19 09:21:56,075 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 134 flow. Second operand 3 states and 105 transitions. [2024-11-19 09:21:56,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 50 transitions, 166 flow [2024-11-19 09:21:56,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 166 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 09:21:56,077 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 112 flow [2024-11-19 09:21:56,077 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-11-19 09:21:56,077 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2024-11-19 09:21:56,078 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 112 flow [2024-11-19 09:21:56,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:56,078 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:56,078 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:21:56,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 09:21:56,078 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-19 09:21:56,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:56,079 INFO L85 PathProgramCache]: Analyzing trace with hash 377079, now seen corresponding path program 1 times [2024-11-19 09:21:56,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:56,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241790488] [2024-11-19 09:21:56,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:56,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:21:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:56,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:21:56,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241790488] [2024-11-19 09:21:56,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241790488] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:21:56,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:21:56,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:21:56,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588468251] [2024-11-19 09:21:56,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:21:56,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:21:56,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:21:56,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:21:56,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:21:56,121 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2024-11-19 09:21:56,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:56,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:21:56,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2024-11-19 09:21:56,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:21:56,223 INFO L124 PetriNetUnfolderBase]: 548/1215 cut-off events. [2024-11-19 09:21:56,223 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-19 09:21:56,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2122 conditions, 1215 events. 548/1215 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7076 event pairs, 468 based on Foata normal form. 0/1155 useless extension candidates. Maximal degree in co-relation 2114. Up to 868 conditions per place. [2024-11-19 09:21:56,229 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 29 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-11-19 09:21:56,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 178 flow [2024-11-19 09:21:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:21:56,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:21:56,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-11-19 09:21:56,231 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-11-19 09:21:56,231 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 112 flow. Second operand 3 states and 108 transitions. [2024-11-19 09:21:56,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 178 flow [2024-11-19 09:21:56,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:21:56,232 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 125 flow [2024-11-19 09:21:56,232 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-11-19 09:21:56,233 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2024-11-19 09:21:56,233 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 125 flow [2024-11-19 09:21:56,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:56,233 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:56,234 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:21:56,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:21:56,234 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-19 09:21:56,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:56,234 INFO L85 PathProgramCache]: Analyzing trace with hash 362384818, now seen corresponding path program 1 times [2024-11-19 09:21:56,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:56,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279725070] [2024-11-19 09:21:56,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:56,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:21:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:56,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:21:56,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279725070] [2024-11-19 09:21:56,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279725070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:21:56,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653121039] [2024-11-19 09:21:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:56,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:21:56,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:21:56,285 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) [2024-11-19 09:21:56,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:21:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:21:56,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 09:21:56,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:21:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:56,386 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:21:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:56,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653121039] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:21:56,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:21:56,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-11-19 09:21:56,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872508872] [2024-11-19 09:21:56,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:21:56,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:21:56,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:21:56,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:21:56,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:21:56,485 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2024-11-19 09:21:56,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 125 flow. Second operand has 8 states, 8 states have (on average 26.875) internal successors, (215), 8 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:56,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:21:56,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2024-11-19 09:21:56,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:21:56,664 INFO L124 PetriNetUnfolderBase]: 550/1223 cut-off events. [2024-11-19 09:21:56,664 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-19 09:21:56,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2150 conditions, 1223 events. 550/1223 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7097 event pairs, 468 based on Foata normal form. 1/1165 useless extension candidates. Maximal degree in co-relation 2140. Up to 870 conditions per place. [2024-11-19 09:21:56,669 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 32 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-11-19 09:21:56,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 231 flow [2024-11-19 09:21:56,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:21:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:21:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-11-19 09:21:56,671 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5188172043010753 [2024-11-19 09:21:56,671 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 125 flow. Second operand 6 states and 193 transitions. [2024-11-19 09:21:56,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 231 flow [2024-11-19 09:21:56,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 60 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:21:56,672 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 175 flow [2024-11-19 09:21:56,672 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=175, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-11-19 09:21:56,673 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2024-11-19 09:21:56,673 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 175 flow [2024-11-19 09:21:56,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.875) internal successors, (215), 8 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:56,673 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:56,673 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-19 09:21:56,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:21:56,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:21:56,878 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-19 09:21:56,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:56,878 INFO L85 PathProgramCache]: Analyzing trace with hash -448912541, now seen corresponding path program 2 times [2024-11-19 09:21:56,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:56,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615433371] [2024-11-19 09:21:56,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:21:56,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:56,888 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:21:56,888 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:21:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:57,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:21:57,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615433371] [2024-11-19 09:21:57,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615433371] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:21:57,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725682054] [2024-11-19 09:21:57,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:21:57,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:21:57,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:21:57,024 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) [2024-11-19 09:21:57,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:21:57,080 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:21:57,081 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:21:57,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:21:57,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:21:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:57,261 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:21:57,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725682054] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:21:57,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:21:57,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-11-19 09:21:57,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255277671] [2024-11-19 09:21:57,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:21:57,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:21:57,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:21:57,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:21:57,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:21:57,333 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2024-11-19 09:21:57,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 175 flow. Second operand has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:57,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:21:57,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2024-11-19 09:21:57,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:21:57,479 INFO L124 PetriNetUnfolderBase]: 550/1222 cut-off events. [2024-11-19 09:21:57,479 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-11-19 09:21:57,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2163 conditions, 1222 events. 550/1222 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7076 event pairs, 468 based on Foata normal form. 1/1165 useless extension candidates. Maximal degree in co-relation 2149. Up to 866 conditions per place. [2024-11-19 09:21:57,487 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 28 selfloop transitions, 10 changer transitions 0/59 dead transitions. [2024-11-19 09:21:57,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 59 transitions, 249 flow [2024-11-19 09:21:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:21:57,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:21:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-11-19 09:21:57,489 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48185483870967744 [2024-11-19 09:21:57,489 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 175 flow. Second operand 8 states and 239 transitions. [2024-11-19 09:21:57,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 59 transitions, 249 flow [2024-11-19 09:21:57,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 59 transitions, 223 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-19 09:21:57,491 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 167 flow [2024-11-19 09:21:57,491 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=167, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2024-11-19 09:21:57,492 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 5 predicate places. [2024-11-19 09:21:57,492 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 167 flow [2024-11-19 09:21:57,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:57,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:57,492 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:21:57,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:21:57,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-19 09:21:57,697 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-19 09:21:57,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:57,698 INFO L85 PathProgramCache]: Analyzing trace with hash -409036415, now seen corresponding path program 1 times [2024-11-19 09:21:57,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:57,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715972656] [2024-11-19 09:21:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:57,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:21:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:57,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:21:57,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715972656] [2024-11-19 09:21:57,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715972656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:21:57,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031673231] [2024-11-19 09:21:57,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:57,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:21:57,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:21:57,800 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) [2024-11-19 09:21:57,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:21:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:21:57,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 09:21:57,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:21:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:57,876 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:21:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:57,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031673231] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:21:57,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:21:57,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-19 09:21:57,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188126968] [2024-11-19 09:21:57,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:21:57,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:21:57,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:21:57,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:21:57,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:21:57,932 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 62 [2024-11-19 09:21:57,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 167 flow. Second operand has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:57,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:21:57,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 62 [2024-11-19 09:21:57,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:21:58,061 INFO L124 PetriNetUnfolderBase]: 548/1223 cut-off events. [2024-11-19 09:21:58,061 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-19 09:21:58,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2167 conditions, 1223 events. 548/1223 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7076 event pairs, 468 based on Foata normal form. 4/1169 useless extension candidates. Maximal degree in co-relation 2155. Up to 865 conditions per place. [2024-11-19 09:21:58,067 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 31 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-11-19 09:21:58,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 60 transitions, 262 flow [2024-11-19 09:21:58,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:21:58,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:21:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-11-19 09:21:58,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5060483870967742 [2024-11-19 09:21:58,102 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 167 flow. Second operand 8 states and 251 transitions. [2024-11-19 09:21:58,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 60 transitions, 262 flow [2024-11-19 09:21:58,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 244 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-19 09:21:58,104 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 179 flow [2024-11-19 09:21:58,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=179, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2024-11-19 09:21:58,105 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 9 predicate places. [2024-11-19 09:21:58,105 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 179 flow [2024-11-19 09:21:58,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:58,105 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:58,105 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:21:58,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 09:21:58,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:21:58,310 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-19 09:21:58,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:58,310 INFO L85 PathProgramCache]: Analyzing trace with hash -734801939, now seen corresponding path program 2 times [2024-11-19 09:21:58,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:58,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615789257] [2024-11-19 09:21:58,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:21:58,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:58,322 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:21:58,323 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:21:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 09:21:58,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:21:58,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615789257] [2024-11-19 09:21:58,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615789257] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:21:58,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:21:58,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:21:58,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957063250] [2024-11-19 09:21:58,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:21:58,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:21:58,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:21:58,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:21:58,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:21:58,530 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2024-11-19 09:21:58,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:58,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:21:58,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2024-11-19 09:21:58,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:21:58,810 INFO L124 PetriNetUnfolderBase]: 700/1799 cut-off events. [2024-11-19 09:21:58,811 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-11-19 09:21:58,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3018 conditions, 1799 events. 700/1799 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 12688 event pairs, 468 based on Foata normal form. 33/1741 useless extension candidates. Maximal degree in co-relation 3004. Up to 877 conditions per place. [2024-11-19 09:21:58,819 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 59 selfloop transitions, 5 changer transitions 0/84 dead transitions. [2024-11-19 09:21:58,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 373 flow [2024-11-19 09:21:58,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:21:58,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:21:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 184 transitions. [2024-11-19 09:21:58,820 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5935483870967742 [2024-11-19 09:21:58,820 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 179 flow. Second operand 5 states and 184 transitions. [2024-11-19 09:21:58,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 373 flow [2024-11-19 09:21:58,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 365 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:21:58,823 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 198 flow [2024-11-19 09:21:58,823 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2024-11-19 09:21:58,824 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2024-11-19 09:21:58,824 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 198 flow [2024-11-19 09:21:58,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:58,824 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:58,824 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 3, 2, 1, 1, 1, 1, 1] [2024-11-19 09:21:58,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 09:21:58,825 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-19 09:21:58,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:58,825 INFO L85 PathProgramCache]: Analyzing trace with hash -185967053, now seen corresponding path program 1 times [2024-11-19 09:21:58,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:58,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046862233] [2024-11-19 09:21:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:58,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:21:58,838 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 09:21:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:21:58,849 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 09:21:58,849 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 09:21:58,849 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2024-11-19 09:21:58,849 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2024-11-19 09:21:58,850 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2024-11-19 09:21:58,850 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2024-11-19 09:21:58,850 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2024-11-19 09:21:58,850 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2024-11-19 09:21:58,850 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2024-11-19 09:21:58,850 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2024-11-19 09:21:58,850 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2024-11-19 09:21:58,850 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 13 remaining) [2024-11-19 09:21:58,850 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2024-11-19 09:21:58,850 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2024-11-19 09:21:58,850 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2024-11-19 09:21:58,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 09:21:58,850 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-11-19 09:21:58,851 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 09:21:58,851 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-19 09:21:58,871 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 09:21:58,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 87 transitions, 192 flow [2024-11-19 09:21:58,878 INFO L124 PetriNetUnfolderBase]: 13/101 cut-off events. [2024-11-19 09:21:58,878 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-19 09:21:58,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 101 events. 13/101 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 337 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2024-11-19 09:21:58,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 87 transitions, 192 flow [2024-11-19 09:21:58,879 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 87 transitions, 192 flow [2024-11-19 09:21:58,880 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:21:58,880 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@29f1e06c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:21:58,880 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-11-19 09:21:58,881 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:21:58,881 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:21:58,881 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:21:58,881 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:58,881 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:21:58,881 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-19 09:21:58,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:58,882 INFO L85 PathProgramCache]: Analyzing trace with hash 463469, now seen corresponding path program 1 times [2024-11-19 09:21:58,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:58,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051199669] [2024-11-19 09:21:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:58,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:21:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:58,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:21:58,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051199669] [2024-11-19 09:21:58,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051199669] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:21:58,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:21:58,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:21:58,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730570283] [2024-11-19 09:21:58,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:21:58,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:21:58,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:21:58,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:21:58,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:21:58,926 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 87 [2024-11-19 09:21:58,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:58,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:21:58,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 87 [2024-11-19 09:21:58,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:21:59,896 INFO L124 PetriNetUnfolderBase]: 8783/15207 cut-off events. [2024-11-19 09:21:59,897 INFO L125 PetriNetUnfolderBase]: For 720/720 co-relation queries the response was YES. [2024-11-19 09:21:59,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27610 conditions, 15207 events. 8783/15207 cut-off events. For 720/720 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 114914 event pairs, 7668 based on Foata normal form. 2972/17545 useless extension candidates. Maximal degree in co-relation 2768. Up to 11966 conditions per place. [2024-11-19 09:21:59,965 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 38 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2024-11-19 09:21:59,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 238 flow [2024-11-19 09:21:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:21:59,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:21:59,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2024-11-19 09:21:59,967 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5708812260536399 [2024-11-19 09:21:59,967 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 192 flow. Second operand 3 states and 149 transitions. [2024-11-19 09:21:59,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 238 flow [2024-11-19 09:21:59,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 236 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-19 09:21:59,968 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 160 flow [2024-11-19 09:21:59,968 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-11-19 09:21:59,969 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, -8 predicate places. [2024-11-19 09:21:59,969 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 160 flow [2024-11-19 09:21:59,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:21:59,969 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:21:59,969 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:21:59,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-19 09:21:59,969 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-19 09:21:59,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:21:59,970 INFO L85 PathProgramCache]: Analyzing trace with hash 463470, now seen corresponding path program 1 times [2024-11-19 09:21:59,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:21:59,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202064851] [2024-11-19 09:21:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:21:59,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:21:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:21:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:21:59,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:21:59,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202064851] [2024-11-19 09:21:59,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202064851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:21:59,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:21:59,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:21:59,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988568184] [2024-11-19 09:21:59,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:21:59,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:21:59,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:21:59,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:21:59,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:22:00,007 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-11-19 09:22:00,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:00,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:22:00,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-11-19 09:22:00,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:22:01,130 INFO L124 PetriNetUnfolderBase]: 8783/15209 cut-off events. [2024-11-19 09:22:01,131 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2024-11-19 09:22:01,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27517 conditions, 15209 events. 8783/15209 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 114903 event pairs, 7668 based on Foata normal form. 0/14574 useless extension candidates. Maximal degree in co-relation 27508. Up to 11968 conditions per place. [2024-11-19 09:22:01,211 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 40 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-11-19 09:22:01,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 73 transitions, 248 flow [2024-11-19 09:22:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:22:01,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:22:01,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2024-11-19 09:22:01,212 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5823754789272031 [2024-11-19 09:22:01,212 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 160 flow. Second operand 3 states and 152 transitions. [2024-11-19 09:22:01,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 73 transitions, 248 flow [2024-11-19 09:22:01,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 73 transitions, 247 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:22:01,215 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 173 flow [2024-11-19 09:22:01,215 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-11-19 09:22:01,216 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, -6 predicate places. [2024-11-19 09:22:01,216 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 173 flow [2024-11-19 09:22:01,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:01,216 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:22:01,216 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:22:01,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 09:22:01,216 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-19 09:22:01,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:22:01,217 INFO L85 PathProgramCache]: Analyzing trace with hash 445409353, now seen corresponding path program 1 times [2024-11-19 09:22:01,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:22:01,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516866395] [2024-11-19 09:22:01,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:22:01,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:22:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:22:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:22:01,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:22:01,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516866395] [2024-11-19 09:22:01,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516866395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:22:01,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465720103] [2024-11-19 09:22:01,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:22:01,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:22:01,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:22:01,266 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) [2024-11-19 09:22:01,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:22:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:22:01,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 09:22:01,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:22:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:22:01,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:22:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:22:01,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465720103] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:22:01,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:22:01,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-11-19 09:22:01,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269696146] [2024-11-19 09:22:01,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:22:01,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:22:01,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:22:01,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:22:01,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:22:01,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-11-19 09:22:01,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 173 flow. Second operand has 8 states, 8 states have (on average 37.875) internal successors, (303), 8 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:01,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:22:01,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-11-19 09:22:01,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:22:02,615 INFO L124 PetriNetUnfolderBase]: 8785/15217 cut-off events. [2024-11-19 09:22:02,616 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2024-11-19 09:22:02,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27545 conditions, 15217 events. 8785/15217 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 114948 event pairs, 7668 based on Foata normal form. 1/14584 useless extension candidates. Maximal degree in co-relation 27534. Up to 11970 conditions per place. [2024-11-19 09:22:02,682 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 43 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2024-11-19 09:22:02,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 301 flow [2024-11-19 09:22:02,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:22:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:22:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 270 transitions. [2024-11-19 09:22:02,683 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-11-19 09:22:02,683 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 173 flow. Second operand 6 states and 270 transitions. [2024-11-19 09:22:02,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 301 flow [2024-11-19 09:22:02,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 81 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:22:02,685 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 223 flow [2024-11-19 09:22:02,686 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2024-11-19 09:22:02,687 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 1 predicate places. [2024-11-19 09:22:02,687 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 223 flow [2024-11-19 09:22:02,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.875) internal successors, (303), 8 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:02,687 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:22:02,688 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:22:02,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 09:22:02,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:22:02,890 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-19 09:22:02,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:22:02,891 INFO L85 PathProgramCache]: Analyzing trace with hash -892975008, now seen corresponding path program 1 times [2024-11-19 09:22:02,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:22:02,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418312385] [2024-11-19 09:22:02,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:22:02,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:22:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:22:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:22:02,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:22:02,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418312385] [2024-11-19 09:22:02,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418312385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:22:02,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827714001] [2024-11-19 09:22:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:22:02,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:22:02,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:22:02,934 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:22:02,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:22:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:22:03,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 09:22:03,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:22:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:22:03,014 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:22:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:22:03,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827714001] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:22:03,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:22:03,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-19 09:22:03,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667389077] [2024-11-19 09:22:03,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:22:03,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:22:03,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:22:03,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:22:03,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:22:03,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 87 [2024-11-19 09:22:03,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 223 flow. Second operand has 9 states, 9 states have (on average 39.0) internal successors, (351), 9 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:03,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:22:03,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 87 [2024-11-19 09:22:03,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:22:04,226 INFO L124 PetriNetUnfolderBase]: 8783/15219 cut-off events. [2024-11-19 09:22:04,227 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-11-19 09:22:04,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27566 conditions, 15219 events. 8783/15219 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 114922 event pairs, 7668 based on Foata normal form. 4/14590 useless extension candidates. Maximal degree in co-relation 27551. Up to 11965 conditions per place. [2024-11-19 09:22:04,288 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 42 selfloop transitions, 8 changer transitions 0/82 dead transitions. [2024-11-19 09:22:04,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 82 transitions, 327 flow [2024-11-19 09:22:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:22:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:22:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 350 transitions. [2024-11-19 09:22:04,289 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5028735632183908 [2024-11-19 09:22:04,290 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 223 flow. Second operand 8 states and 350 transitions. [2024-11-19 09:22:04,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 82 transitions, 327 flow [2024-11-19 09:22:04,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 82 transitions, 319 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-19 09:22:04,292 INFO L231 Difference]: Finished difference. Result has 91 places, 77 transitions, 239 flow [2024-11-19 09:22:04,292 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=239, PETRI_PLACES=91, PETRI_TRANSITIONS=77} [2024-11-19 09:22:04,292 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 10 predicate places. [2024-11-19 09:22:04,293 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 77 transitions, 239 flow [2024-11-19 09:22:04,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 39.0) internal successors, (351), 9 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:04,293 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:22:04,293 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-19 09:22:04,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 09:22:04,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 09:22:04,496 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-19 09:22:04,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:22:04,498 INFO L85 PathProgramCache]: Analyzing trace with hash -933566118, now seen corresponding path program 2 times [2024-11-19 09:22:04,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:22:04,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985063069] [2024-11-19 09:22:04,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:22:04,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:22:04,511 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:22:04,513 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:22:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:22:04,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:22:04,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985063069] [2024-11-19 09:22:04,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985063069] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:22:04,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600467076] [2024-11-19 09:22:04,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:22:04,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:22:04,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:22:04,646 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:22:04,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:22:04,709 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:22:04,710 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:22:04,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:22:04,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:22:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:22:04,839 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:22:04,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600467076] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:22:04,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:22:04,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-11-19 09:22:04,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090251647] [2024-11-19 09:22:04,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:22:04,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:22:04,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:22:04,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:22:04,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:22:04,877 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-11-19 09:22:04,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 77 transitions, 239 flow. Second operand has 8 states, 8 states have (on average 37.375) internal successors, (299), 8 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:04,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:22:04,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-11-19 09:22:04,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:22:05,924 INFO L124 PetriNetUnfolderBase]: 8783/15217 cut-off events. [2024-11-19 09:22:05,924 INFO L125 PetriNetUnfolderBase]: For 457/457 co-relation queries the response was YES. [2024-11-19 09:22:05,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27575 conditions, 15217 events. 8783/15217 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 114811 event pairs, 7668 based on Foata normal form. 2/14586 useless extension candidates. Maximal degree in co-relation 27556. Up to 11964 conditions per place. [2024-11-19 09:22:05,998 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 39 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-11-19 09:22:05,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 80 transitions, 343 flow [2024-11-19 09:22:05,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:22:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:22:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 336 transitions. [2024-11-19 09:22:06,000 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-11-19 09:22:06,000 INFO L175 Difference]: Start difference. First operand has 91 places, 77 transitions, 239 flow. Second operand 8 states and 336 transitions. [2024-11-19 09:22:06,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 80 transitions, 343 flow [2024-11-19 09:22:06,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 80 transitions, 317 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-11-19 09:22:06,002 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 235 flow [2024-11-19 09:22:06,002 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=235, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2024-11-19 09:22:06,003 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 9 predicate places. [2024-11-19 09:22:06,003 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 235 flow [2024-11-19 09:22:06,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.375) internal successors, (299), 8 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:06,003 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:22:06,003 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:22:06,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 09:22:06,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 09:22:06,204 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-19 09:22:06,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:22:06,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1945793356, now seen corresponding path program 2 times [2024-11-19 09:22:06,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:22:06,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110799952] [2024-11-19 09:22:06,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:22:06,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:22:06,218 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:22:06,220 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:22:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 09:22:06,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:22:06,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110799952] [2024-11-19 09:22:06,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110799952] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:22:06,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:22:06,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:22:06,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408184515] [2024-11-19 09:22:06,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:22:06,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:22:06,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:22:06,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:22:06,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:22:06,318 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-11-19 09:22:06,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:06,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:22:06,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-11-19 09:22:06,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:22:08,541 INFO L124 PetriNetUnfolderBase]: 11305/22128 cut-off events. [2024-11-19 09:22:08,541 INFO L125 PetriNetUnfolderBase]: For 476/476 co-relation queries the response was YES. [2024-11-19 09:22:08,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38177 conditions, 22128 events. 11305/22128 cut-off events. For 476/476 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 202519 event pairs, 7668 based on Foata normal form. 333/21380 useless extension candidates. Maximal degree in co-relation 38160. Up to 11977 conditions per place. [2024-11-19 09:22:08,679 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 92 selfloop transitions, 5 changer transitions 0/127 dead transitions. [2024-11-19 09:22:08,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 127 transitions, 549 flow [2024-11-19 09:22:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:22:08,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:22:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 272 transitions. [2024-11-19 09:22:08,680 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6252873563218391 [2024-11-19 09:22:08,680 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 235 flow. Second operand 5 states and 272 transitions. [2024-11-19 09:22:08,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 127 transitions, 549 flow [2024-11-19 09:22:08,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 127 transitions, 535 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-11-19 09:22:08,683 INFO L231 Difference]: Finished difference. Result has 90 places, 79 transitions, 248 flow [2024-11-19 09:22:08,683 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=90, PETRI_TRANSITIONS=79} [2024-11-19 09:22:08,684 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 9 predicate places. [2024-11-19 09:22:08,684 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 79 transitions, 248 flow [2024-11-19 09:22:08,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:08,684 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:22:08,684 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:22:08,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 09:22:08,684 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-19 09:22:08,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:22:08,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1102395577, now seen corresponding path program 1 times [2024-11-19 09:22:08,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:22:08,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539669714] [2024-11-19 09:22:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:22:08,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:22:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:22:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-19 09:22:09,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:22:09,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539669714] [2024-11-19 09:22:09,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539669714] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:22:09,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:22:09,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:22:09,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903664581] [2024-11-19 09:22:09,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:22:09,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:22:09,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:22:09,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:22:09,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:22:09,084 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-11-19 09:22:09,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 79 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:09,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:22:09,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-11-19 09:22:09,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:22:11,150 INFO L124 PetriNetUnfolderBase]: 13517/26657 cut-off events. [2024-11-19 09:22:11,150 INFO L125 PetriNetUnfolderBase]: For 5680/6088 co-relation queries the response was YES. [2024-11-19 09:22:11,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49764 conditions, 26657 events. 13517/26657 cut-off events. For 5680/6088 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 250374 event pairs, 9268 based on Foata normal form. 396/25814 useless extension candidates. Maximal degree in co-relation 49746. Up to 14369 conditions per place. [2024-11-19 09:22:11,279 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 96 selfloop transitions, 5 changer transitions 0/131 dead transitions. [2024-11-19 09:22:11,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 131 transitions, 600 flow [2024-11-19 09:22:11,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:22:11,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:22:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 270 transitions. [2024-11-19 09:22:11,280 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-11-19 09:22:11,281 INFO L175 Difference]: Start difference. First operand has 90 places, 79 transitions, 248 flow. Second operand 5 states and 270 transitions. [2024-11-19 09:22:11,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 131 transitions, 600 flow [2024-11-19 09:22:11,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 599 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:22:11,284 INFO L231 Difference]: Finished difference. Result has 95 places, 81 transitions, 274 flow [2024-11-19 09:22:11,284 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=95, PETRI_TRANSITIONS=81} [2024-11-19 09:22:11,284 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 14 predicate places. [2024-11-19 09:22:11,284 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 81 transitions, 274 flow [2024-11-19 09:22:11,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:11,285 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:22:11,285 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:22:11,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-19 09:22:11,285 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-19 09:22:11,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:22:11,285 INFO L85 PathProgramCache]: Analyzing trace with hash -2043221292, now seen corresponding path program 1 times [2024-11-19 09:22:11,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:22:11,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294612583] [2024-11-19 09:22:11,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:22:11,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:22:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:22:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 09:22:11,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:22:11,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294612583] [2024-11-19 09:22:11,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294612583] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:22:11,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999104104] [2024-11-19 09:22:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:22:11,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:22:11,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:22:11,444 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:22:11,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:22:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:22:11,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:22:11,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:22:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 09:22:11,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:22:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 09:22:11,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999104104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:22:11,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:22:11,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:22:11,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625780437] [2024-11-19 09:22:11,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:22:11,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:22:11,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:22:11,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:22:11,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:22:11,924 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-11-19 09:22:11,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 81 transitions, 274 flow. Second operand has 11 states, 11 states have (on average 38.72727272727273) internal successors, (426), 11 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:11,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:22:11,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-11-19 09:22:11,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:22:15,351 INFO L124 PetriNetUnfolderBase]: 22172/42680 cut-off events. [2024-11-19 09:22:15,351 INFO L125 PetriNetUnfolderBase]: For 12921/13515 co-relation queries the response was YES. [2024-11-19 09:22:15,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85953 conditions, 42680 events. 22172/42680 cut-off events. For 12921/13515 co-relation queries the response was YES. Maximal size of possible extension queue 1458. Compared 419597 event pairs, 8638 based on Foata normal form. 399/41927 useless extension candidates. Maximal degree in co-relation 85932. Up to 14756 conditions per place. [2024-11-19 09:22:15,592 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 131 selfloop transitions, 7 changer transitions 0/168 dead transitions. [2024-11-19 09:22:15,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 168 transitions, 816 flow [2024-11-19 09:22:15,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:22:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:22:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 340 transitions. [2024-11-19 09:22:15,593 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6513409961685823 [2024-11-19 09:22:15,593 INFO L175 Difference]: Start difference. First operand has 95 places, 81 transitions, 274 flow. Second operand 6 states and 340 transitions. [2024-11-19 09:22:15,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 168 transitions, 816 flow [2024-11-19 09:22:15,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 168 transitions, 815 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:22:15,602 INFO L231 Difference]: Finished difference. Result has 101 places, 84 transitions, 314 flow [2024-11-19 09:22:15,602 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=101, PETRI_TRANSITIONS=84} [2024-11-19 09:22:15,603 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 20 predicate places. [2024-11-19 09:22:15,603 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 84 transitions, 314 flow [2024-11-19 09:22:15,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 38.72727272727273) internal successors, (426), 11 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:15,603 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:22:15,603 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:22:15,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 09:22:15,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-19 09:22:15,808 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-19 09:22:15,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:22:15,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1084629011, now seen corresponding path program 1 times [2024-11-19 09:22:15,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:22:15,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976815359] [2024-11-19 09:22:15,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:22:15,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:22:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:22:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 09:22:15,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:22:15,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976815359] [2024-11-19 09:22:15,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976815359] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:22:15,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:22:15,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:22:15,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319257323] [2024-11-19 09:22:15,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:22:15,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:22:15,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:22:15,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:22:15,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:22:15,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-11-19 09:22:15,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 84 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:15,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:22:15,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-11-19 09:22:15,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:22:18,913 INFO L124 PetriNetUnfolderBase]: 21128/37365 cut-off events. [2024-11-19 09:22:18,914 INFO L125 PetriNetUnfolderBase]: For 15722/16325 co-relation queries the response was YES. [2024-11-19 09:22:19,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84046 conditions, 37365 events. 21128/37365 cut-off events. For 15722/16325 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 327423 event pairs, 2500 based on Foata normal form. 1197/37565 useless extension candidates. Maximal degree in co-relation 84022. Up to 24777 conditions per place. [2024-11-19 09:22:19,126 INFO L140 encePairwiseOnDemand]: 84/87 looper letters, 76 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-11-19 09:22:19,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 109 transitions, 550 flow [2024-11-19 09:22:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:22:19,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:22:19,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2024-11-19 09:22:19,128 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6628352490421456 [2024-11-19 09:22:19,128 INFO L175 Difference]: Start difference. First operand has 101 places, 84 transitions, 314 flow. Second operand 3 states and 173 transitions. [2024-11-19 09:22:19,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 109 transitions, 550 flow [2024-11-19 09:22:19,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 109 transitions, 547 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:22:19,155 INFO L231 Difference]: Finished difference. Result has 101 places, 83 transitions, 315 flow [2024-11-19 09:22:19,156 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=101, PETRI_TRANSITIONS=83} [2024-11-19 09:22:19,156 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 20 predicate places. [2024-11-19 09:22:19,156 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 315 flow [2024-11-19 09:22:19,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:19,156 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:22:19,157 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-11-19 09:22:19,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-19 09:22:19,157 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-19 09:22:19,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:22:19,160 INFO L85 PathProgramCache]: Analyzing trace with hash 287831253, now seen corresponding path program 1 times [2024-11-19 09:22:19,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:22:19,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992669257] [2024-11-19 09:22:19,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:22:19,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:22:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:22:19,183 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 09:22:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:22:19,200 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 09:22:19,200 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 09:22:19,200 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2024-11-19 09:22:19,200 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2024-11-19 09:22:19,200 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2024-11-19 09:22:19,200 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (12 of 16 remaining) [2024-11-19 09:22:19,201 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2024-11-19 09:22:19,201 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2024-11-19 09:22:19,201 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2024-11-19 09:22:19,201 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2024-11-19 09:22:19,201 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2024-11-19 09:22:19,201 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 16 remaining) [2024-11-19 09:22:19,201 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2024-11-19 09:22:19,201 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2024-11-19 09:22:19,201 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 16 remaining) [2024-11-19 09:22:19,201 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2024-11-19 09:22:19,202 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2024-11-19 09:22:19,202 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2024-11-19 09:22:19,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-19 09:22:19,202 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:22:19,202 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 09:22:19,203 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-19 09:22:19,250 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 09:22:19,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 112 transitions, 252 flow [2024-11-19 09:22:19,268 INFO L124 PetriNetUnfolderBase]: 17/131 cut-off events. [2024-11-19 09:22:19,268 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-19 09:22:19,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 131 events. 17/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 477 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 109. Up to 5 conditions per place. [2024-11-19 09:22:19,269 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 112 transitions, 252 flow [2024-11-19 09:22:19,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 112 transitions, 252 flow [2024-11-19 09:22:19,276 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:22:19,277 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@29f1e06c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:22:19,277 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-19 09:22:19,278 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:22:19,278 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:22:19,278 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:22:19,278 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:22:19,279 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:22:19,279 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2024-11-19 09:22:19,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:22:19,279 INFO L85 PathProgramCache]: Analyzing trace with hash 574685, now seen corresponding path program 1 times [2024-11-19 09:22:19,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:22:19,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567007540] [2024-11-19 09:22:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:22:19,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:22:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:22:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:22:19,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:22:19,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567007540] [2024-11-19 09:22:19,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567007540] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:22:19,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:22:19,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:22:19,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658838677] [2024-11-19 09:22:19,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:22:19,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:22:19,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:22:19,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:22:19,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:22:19,328 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 112 [2024-11-19 09:22:19,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:22:19,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:22:19,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 112 [2024-11-19 09:22:19,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:22:32,368 INFO L124 PetriNetUnfolderBase]: 120998/183954 cut-off events. [2024-11-19 09:22:32,368 INFO L125 PetriNetUnfolderBase]: For 12412/12412 co-relation queries the response was YES. [2024-11-19 09:22:32,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342358 conditions, 183954 events. 120998/183954 cut-off events. For 12412/12412 co-relation queries the response was YES. Maximal size of possible extension queue 5211. Compared 1584113 event pairs, 106668 based on Foata normal form. 42805/220364 useless extension candidates. Maximal degree in co-relation 27715. Up to 152966 conditions per place.