./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d 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/weaver/popl20-bad-buffer-mult-alt2.wvr.c -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 a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:50:25,727 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:50:25,794 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:50:25,797 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:50:25,800 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:50:25,824 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:50:25,826 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:50:25,826 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:50:25,827 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:50:25,827 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:50:25,827 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:50:25,827 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:50:25,828 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:50:25,830 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:50:25,830 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:50:25,830 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:50:25,830 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:50:25,831 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:50:25,831 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:50:25,831 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:50:25,831 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:50:25,834 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:50:25,834 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:50:25,834 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:50:25,834 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:50:25,834 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:50:25,835 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:50:25,835 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:50:25,835 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:50:25,835 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:50:25,835 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:50:25,835 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:50:25,836 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:50:25,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:50:25,836 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:50:25,836 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:50:25,836 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:50:25,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:50:25,837 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:50:25,837 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:50:25,837 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:50:25,838 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:50:25,838 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2024-11-09 10:50:26,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:50:26,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:50:26,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:50:26,072 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:50:26,073 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:50:26,073 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-11-09 10:50:27,282 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:50:27,469 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:50:27,470 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-11-09 10:50:27,478 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11cbe50be/cf8b374093dc42fab87b55477da2186c/FLAG405076df1 [2024-11-09 10:50:27,854 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11cbe50be/cf8b374093dc42fab87b55477da2186c [2024-11-09 10:50:27,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:50:27,857 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:50:27,858 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:50:27,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:50:27,863 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:50:27,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:50:27" (1/1) ... [2024-11-09 10:50:27,864 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42329bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:27, skipping insertion in model container [2024-11-09 10:50:27,864 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:50:27" (1/1) ... [2024-11-09 10:50:27,889 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:50:28,076 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:50:28,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:50:28,085 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:50:28,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:50:28,129 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:50:28,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:28 WrapperNode [2024-11-09 10:50:28,130 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:50:28,131 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:50:28,131 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:50:28,131 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:50:28,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:28" (1/1) ... [2024-11-09 10:50:28,145 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:28" (1/1) ... [2024-11-09 10:50:28,168 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 309 [2024-11-09 10:50:28,170 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:50:28,171 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:50:28,171 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:50:28,171 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:50:28,180 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:28" (1/1) ... [2024-11-09 10:50:28,180 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:28" (1/1) ... [2024-11-09 10:50:28,187 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:28" (1/1) ... [2024-11-09 10:50:28,202 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-09 10:50:28,202 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:28" (1/1) ... [2024-11-09 10:50:28,202 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:28" (1/1) ... [2024-11-09 10:50:28,209 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:28" (1/1) ... [2024-11-09 10:50:28,213 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:28" (1/1) ... [2024-11-09 10:50:28,218 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:28" (1/1) ... [2024-11-09 10:50:28,221 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:28" (1/1) ... [2024-11-09 10:50:28,225 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:50:28,225 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:50:28,225 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:50:28,225 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:50:28,229 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:28" (1/1) ... [2024-11-09 10:50:28,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:50:28,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:28,259 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) [2024-11-09 10:50:28,262 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 [2024-11-09 10:50:28,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:50:28,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:50:28,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:50:28,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:50:28,305 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:50:28,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:50:28,305 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:50:28,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-09 10:50:28,305 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-09 10:50:28,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:50:28,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:50:28,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:50:28,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:50:28,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 10:50:28,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 10:50:28,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:50:28,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:50:28,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:50:28,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:50:28,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:50:28,312 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:50:28,424 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:50:28,425 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:50:28,770 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:50:28,770 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:50:29,075 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:50:29,076 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-09 10:50:29,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:50:29 BoogieIcfgContainer [2024-11-09 10:50:29,076 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:50:29,079 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:50:29,079 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:50:29,081 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:50:29,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:50:27" (1/3) ... [2024-11-09 10:50:29,082 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3a02bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:50:29, skipping insertion in model container [2024-11-09 10:50:29,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:28" (2/3) ... [2024-11-09 10:50:29,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3a02bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:50:29, skipping insertion in model container [2024-11-09 10:50:29,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:50:29" (3/3) ... [2024-11-09 10:50:29,085 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2024-11-09 10:50:29,097 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:50:29,098 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-09 10:50:29,098 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:50:29,164 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-09 10:50:29,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 64 transitions, 156 flow [2024-11-09 10:50:29,222 INFO L124 PetriNetUnfolderBase]: 6/60 cut-off events. [2024-11-09 10:50:29,223 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-09 10:50:29,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 60 events. 6/60 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 132 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-11-09 10:50:29,227 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 64 transitions, 156 flow [2024-11-09 10:50:29,230 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 59 transitions, 142 flow [2024-11-09 10:50:29,237 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:50:29,242 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;@15c0b3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:50:29,242 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-09 10:50:29,246 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:50:29,246 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:50:29,246 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:50:29,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:29,247 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:50:29,248 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:29,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:29,251 INFO L85 PathProgramCache]: Analyzing trace with hash 888770, now seen corresponding path program 1 times [2024-11-09 10:50:29,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:29,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561531089] [2024-11-09 10:50:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:29,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:29,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:29,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561531089] [2024-11-09 10:50:29,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561531089] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:29,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:29,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:50:29,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593704917] [2024-11-09 10:50:29,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:29,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:50:29,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:50:29,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:50:29,634 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-09 10:50:29,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:29,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:29,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-09 10:50:29,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:30,508 INFO L124 PetriNetUnfolderBase]: 4566/6759 cut-off events. [2024-11-09 10:50:30,508 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-09 10:50:30,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13365 conditions, 6759 events. 4566/6759 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 49968 event pairs, 4408 based on Foata normal form. 1/3822 useless extension candidates. Maximal degree in co-relation 12180. Up to 6127 conditions per place. [2024-11-09 10:50:30,562 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 34 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-11-09 10:50:30,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 206 flow [2024-11-09 10:50:30,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:50:30,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:50:30,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-11-09 10:50:30,572 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-11-09 10:50:30,574 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 142 flow. Second operand 3 states and 111 transitions. [2024-11-09 10:50:30,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 206 flow [2024-11-09 10:50:30,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 190 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-09 10:50:30,610 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 122 flow [2024-11-09 10:50:30,612 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2024-11-09 10:50:30,616 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2024-11-09 10:50:30,616 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 122 flow [2024-11-09 10:50:30,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:30,616 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:30,617 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:50:30,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:50:30,617 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:30,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:30,618 INFO L85 PathProgramCache]: Analyzing trace with hash 888771, now seen corresponding path program 1 times [2024-11-09 10:50:30,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:30,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377729015] [2024-11-09 10:50:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:30,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:30,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:30,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377729015] [2024-11-09 10:50:30,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377729015] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:30,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:30,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:50:30,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792925402] [2024-11-09 10:50:30,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:30,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:50:30,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:30,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:50:30,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:50:30,847 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-09 10:50:30,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:30,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:30,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-09 10:50:30,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:31,544 INFO L124 PetriNetUnfolderBase]: 4566/6758 cut-off events. [2024-11-09 10:50:31,544 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:50:31,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13052 conditions, 6758 events. 4566/6758 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 49988 event pairs, 4408 based on Foata normal form. 0/3820 useless extension candidates. Maximal degree in co-relation 13031. Up to 6131 conditions per place. [2024-11-09 10:50:31,592 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 33 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2024-11-09 10:50:31,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 194 flow [2024-11-09 10:50:31,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:50:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:50:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-11-09 10:50:31,596 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-11-09 10:50:31,597 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 122 flow. Second operand 4 states and 134 transitions. [2024-11-09 10:50:31,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 194 flow [2024-11-09 10:50:31,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:31,599 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 124 flow [2024-11-09 10:50:31,599 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-11-09 10:50:31,600 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2024-11-09 10:50:31,600 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 124 flow [2024-11-09 10:50:31,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:31,601 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:31,601 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:50:31,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:50:31,602 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:31,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:31,602 INFO L85 PathProgramCache]: Analyzing trace with hash 27553988, now seen corresponding path program 1 times [2024-11-09 10:50:31,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:31,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423744339] [2024-11-09 10:50:31,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:31,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:31,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:31,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423744339] [2024-11-09 10:50:31,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423744339] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:31,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:31,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:50:31,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233945253] [2024-11-09 10:50:31,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:31,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:50:31,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:31,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:50:31,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:50:31,835 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-09 10:50:31,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:31,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:31,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-09 10:50:31,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:32,539 INFO L124 PetriNetUnfolderBase]: 4568/6764 cut-off events. [2024-11-09 10:50:32,540 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:50:32,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13069 conditions, 6764 events. 4568/6764 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 49992 event pairs, 4408 based on Foata normal form. 0/3823 useless extension candidates. Maximal degree in co-relation 13045. Up to 6134 conditions per place. [2024-11-09 10:50:32,591 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 36 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-11-09 10:50:32,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 60 transitions, 228 flow [2024-11-09 10:50:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:50:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:50:32,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-11-09 10:50:32,596 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-11-09 10:50:32,597 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 124 flow. Second operand 5 states and 164 transitions. [2024-11-09 10:50:32,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 60 transitions, 228 flow [2024-11-09 10:50:32,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 60 transitions, 214 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:50:32,600 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 169 flow [2024-11-09 10:50:32,601 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-11-09 10:50:32,602 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -6 predicate places. [2024-11-09 10:50:32,602 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 169 flow [2024-11-09 10:50:32,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:32,602 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:32,603 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-09 10:50:32,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:50:32,603 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:32,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:32,604 INFO L85 PathProgramCache]: Analyzing trace with hash 709606757, now seen corresponding path program 1 times [2024-11-09 10:50:32,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:32,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166068643] [2024-11-09 10:50:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:32,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:32,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:32,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166068643] [2024-11-09 10:50:32,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166068643] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:32,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050440595] [2024-11-09 10:50:32,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:32,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:32,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:32,838 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) [2024-11-09 10:50:32,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:50:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:32,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:50:32,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:32,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 10:50:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:33,153 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:33,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050440595] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:33,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:33,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:50:33,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486130610] [2024-11-09 10:50:33,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:33,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:50:33,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:33,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:50:33,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:50:33,376 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-09 10:50:33,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 169 flow. Second operand has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:33,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:33,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-09 10:50:33,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:34,073 INFO L124 PetriNetUnfolderBase]: 4570/6769 cut-off events. [2024-11-09 10:50:34,073 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:50:34,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13101 conditions, 6769 events. 4570/6769 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 50144 event pairs, 4408 based on Foata normal form. 0/3831 useless extension candidates. Maximal degree in co-relation 13041. Up to 6128 conditions per place. [2024-11-09 10:50:34,129 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 30 selfloop transitions, 18 changer transitions 0/65 dead transitions. [2024-11-09 10:50:34,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 287 flow [2024-11-09 10:50:34,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:50:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:50:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2024-11-09 10:50:34,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4618055555555556 [2024-11-09 10:50:34,133 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 169 flow. Second operand 9 states and 266 transitions. [2024-11-09 10:50:34,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 287 flow [2024-11-09 10:50:34,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 65 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:50:34,136 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 226 flow [2024-11-09 10:50:34,136 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=226, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-11-09 10:50:34,137 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2024-11-09 10:50:34,137 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 226 flow [2024-11-09 10:50:34,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:34,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:34,138 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:34,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:50:34,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:34,341 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:34,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:34,341 INFO L85 PathProgramCache]: Analyzing trace with hash -890472102, now seen corresponding path program 1 times [2024-11-09 10:50:34,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:34,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32113551] [2024-11-09 10:50:34,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:34,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:34,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:34,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32113551] [2024-11-09 10:50:34,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32113551] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:34,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:34,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:50:34,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53727871] [2024-11-09 10:50:34,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:34,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:50:34,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:34,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:50:34,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:50:34,428 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-09 10:50:34,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:34,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:34,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-09 10:50:34,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:35,037 INFO L124 PetriNetUnfolderBase]: 5237/7874 cut-off events. [2024-11-09 10:50:35,039 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-09 10:50:35,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15261 conditions, 7874 events. 5237/7874 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 59552 event pairs, 5051 based on Foata normal form. 249/4927 useless extension candidates. Maximal degree in co-relation 13045. Up to 6142 conditions per place. [2024-11-09 10:50:35,082 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 77 selfloop transitions, 3 changer transitions 0/97 dead transitions. [2024-11-09 10:50:35,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 97 transitions, 500 flow [2024-11-09 10:50:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:50:35,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:50:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 175 transitions. [2024-11-09 10:50:35,083 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68359375 [2024-11-09 10:50:35,084 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 226 flow. Second operand 4 states and 175 transitions. [2024-11-09 10:50:35,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 97 transitions, 500 flow [2024-11-09 10:50:35,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 97 transitions, 432 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-11-09 10:50:35,086 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 199 flow [2024-11-09 10:50:35,087 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-11-09 10:50:35,087 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2024-11-09 10:50:35,087 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 199 flow [2024-11-09 10:50:35,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:35,088 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:35,088 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:35,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:50:35,088 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:35,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:35,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1095779260, now seen corresponding path program 1 times [2024-11-09 10:50:35,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:35,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967685793] [2024-11-09 10:50:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:35,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:35,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:35,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967685793] [2024-11-09 10:50:35,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967685793] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:35,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:35,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:50:35,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085873949] [2024-11-09 10:50:35,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:35,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:50:35,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:35,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:50:35,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:50:35,158 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-09 10:50:35,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:35,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:35,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-09 10:50:35,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:35,600 INFO L124 PetriNetUnfolderBase]: 3403/5266 cut-off events. [2024-11-09 10:50:35,601 INFO L125 PetriNetUnfolderBase]: For 420/420 co-relation queries the response was YES. [2024-11-09 10:50:35,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11408 conditions, 5266 events. 3403/5266 cut-off events. For 420/420 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 38779 event pairs, 3251 based on Foata normal form. 0/3395 useless extension candidates. Maximal degree in co-relation 9958. Up to 4639 conditions per place. [2024-11-09 10:50:35,636 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 42 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-11-09 10:50:35,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 287 flow [2024-11-09 10:50:35,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:50:35,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:50:35,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-11-09 10:50:35,638 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-11-09 10:50:35,638 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 199 flow. Second operand 4 states and 132 transitions. [2024-11-09 10:50:35,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 287 flow [2024-11-09 10:50:35,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 283 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-09 10:50:35,641 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 199 flow [2024-11-09 10:50:35,641 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-11-09 10:50:35,643 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2024-11-09 10:50:35,643 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 199 flow [2024-11-09 10:50:35,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:35,645 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:35,645 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:35,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 10:50:35,646 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:35,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:35,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1095779259, now seen corresponding path program 1 times [2024-11-09 10:50:35,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:35,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623864090] [2024-11-09 10:50:35,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:35,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:35,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:35,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623864090] [2024-11-09 10:50:35,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623864090] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:35,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:35,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:50:35,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185569024] [2024-11-09 10:50:35,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:35,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:50:35,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:35,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:50:35,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:50:35,731 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-09 10:50:35,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 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) [2024-11-09 10:50:35,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:35,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-09 10:50:35,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:36,420 INFO L124 PetriNetUnfolderBase]: 4227/6777 cut-off events. [2024-11-09 10:50:36,420 INFO L125 PetriNetUnfolderBase]: For 548/548 co-relation queries the response was YES. [2024-11-09 10:50:36,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14656 conditions, 6777 events. 4227/6777 cut-off events. For 548/548 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 53537 event pairs, 4066 based on Foata normal form. 255/4822 useless extension candidates. Maximal degree in co-relation 9911. Up to 4655 conditions per place. [2024-11-09 10:50:36,472 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 64 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2024-11-09 10:50:36,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 403 flow [2024-11-09 10:50:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:50:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:50:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 168 transitions. [2024-11-09 10:50:36,474 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-11-09 10:50:36,474 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 199 flow. Second operand 4 states and 168 transitions. [2024-11-09 10:50:36,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 403 flow [2024-11-09 10:50:36,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 86 transitions, 393 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:50:36,479 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 208 flow [2024-11-09 10:50:36,479 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2024-11-09 10:50:36,479 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2024-11-09 10:50:36,480 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 208 flow [2024-11-09 10:50:36,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 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) [2024-11-09 10:50:36,480 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:36,480 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:36,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:50:36,481 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:36,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:36,481 INFO L85 PathProgramCache]: Analyzing trace with hash -828811114, now seen corresponding path program 1 times [2024-11-09 10:50:36,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:36,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749351385] [2024-11-09 10:50:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:36,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:36,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:36,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749351385] [2024-11-09 10:50:36,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749351385] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:36,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:36,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:50:36,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28901417] [2024-11-09 10:50:36,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:36,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:50:36,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:36,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:50:36,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:50:36,585 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-09 10:50:36,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:36,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:36,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-09 10:50:36,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:36,934 INFO L124 PetriNetUnfolderBase]: 2874/4728 cut-off events. [2024-11-09 10:50:36,934 INFO L125 PetriNetUnfolderBase]: For 836/836 co-relation queries the response was YES. [2024-11-09 10:50:36,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10815 conditions, 4728 events. 2874/4728 cut-off events. For 836/836 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36358 event pairs, 2756 based on Foata normal form. 0/3432 useless extension candidates. Maximal degree in co-relation 6932. Up to 4074 conditions per place. [2024-11-09 10:50:36,959 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 37 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2024-11-09 10:50:36,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 288 flow [2024-11-09 10:50:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:50:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:50:36,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-11-09 10:50:36,961 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-11-09 10:50:36,961 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 208 flow. Second operand 5 states and 154 transitions. [2024-11-09 10:50:36,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 288 flow [2024-11-09 10:50:36,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:50:36,964 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 210 flow [2024-11-09 10:50:36,964 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-11-09 10:50:36,964 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2024-11-09 10:50:36,964 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 210 flow [2024-11-09 10:50:36,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:36,965 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:36,965 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:36,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:50:36,965 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:36,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:36,965 INFO L85 PathProgramCache]: Analyzing trace with hash -828811113, now seen corresponding path program 1 times [2024-11-09 10:50:36,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:36,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530218469] [2024-11-09 10:50:36,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:36,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:37,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:37,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530218469] [2024-11-09 10:50:37,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530218469] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:37,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:37,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:50:37,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252756101] [2024-11-09 10:50:37,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:37,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:50:37,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:37,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:50:37,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:50:37,141 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-09 10:50:37,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 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) [2024-11-09 10:50:37,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:37,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-09 10:50:37,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:37,357 INFO L124 PetriNetUnfolderBase]: 1825/3123 cut-off events. [2024-11-09 10:50:37,357 INFO L125 PetriNetUnfolderBase]: For 614/614 co-relation queries the response was YES. [2024-11-09 10:50:37,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6912 conditions, 3123 events. 1825/3123 cut-off events. For 614/614 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 23122 event pairs, 1742 based on Foata normal form. 0/2534 useless extension candidates. Maximal degree in co-relation 3805. Up to 2669 conditions per place. [2024-11-09 10:50:37,373 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 38 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2024-11-09 10:50:37,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 59 transitions, 286 flow [2024-11-09 10:50:37,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:50:37,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:50:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-11-09 10:50:37,375 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-09 10:50:37,375 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 210 flow. Second operand 4 states and 128 transitions. [2024-11-09 10:50:37,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 59 transitions, 286 flow [2024-11-09 10:50:37,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 275 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:50:37,377 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 199 flow [2024-11-09 10:50:37,377 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-11-09 10:50:37,378 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2024-11-09 10:50:37,378 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 199 flow [2024-11-09 10:50:37,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 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) [2024-11-09 10:50:37,378 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:37,378 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:37,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 10:50:37,379 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:37,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:37,379 INFO L85 PathProgramCache]: Analyzing trace with hash 746146854, now seen corresponding path program 1 times [2024-11-09 10:50:37,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:37,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599269397] [2024-11-09 10:50:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:37,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:37,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:37,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599269397] [2024-11-09 10:50:37,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599269397] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:37,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:37,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:50:37,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435274389] [2024-11-09 10:50:37,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:37,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:50:37,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:37,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:50:37,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:50:37,521 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-09 10:50:37,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:37,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:37,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-09 10:50:37,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:37,685 INFO L124 PetriNetUnfolderBase]: 1199/2183 cut-off events. [2024-11-09 10:50:37,685 INFO L125 PetriNetUnfolderBase]: For 460/460 co-relation queries the response was YES. [2024-11-09 10:50:37,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4625 conditions, 2183 events. 1199/2183 cut-off events. For 460/460 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 15981 event pairs, 1132 based on Foata normal form. 0/1931 useless extension candidates. Maximal degree in co-relation 3217. Up to 1784 conditions per place. [2024-11-09 10:50:37,698 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 34 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2024-11-09 10:50:37,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 271 flow [2024-11-09 10:50:37,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:50:37,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:50:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-11-09 10:50:37,700 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-11-09 10:50:37,700 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 199 flow. Second operand 4 states and 134 transitions. [2024-11-09 10:50:37,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 271 flow [2024-11-09 10:50:37,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 266 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:37,702 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 198 flow [2024-11-09 10:50:37,702 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-11-09 10:50:37,702 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -3 predicate places. [2024-11-09 10:50:37,703 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 198 flow [2024-11-09 10:50:37,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:37,703 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:37,703 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:37,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:50:37,704 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:37,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:37,704 INFO L85 PathProgramCache]: Analyzing trace with hash 126588631, now seen corresponding path program 1 times [2024-11-09 10:50:37,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:37,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26388757] [2024-11-09 10:50:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:37,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:37,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:37,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26388757] [2024-11-09 10:50:37,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26388757] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:37,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:37,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:50:37,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879961453] [2024-11-09 10:50:37,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:37,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:50:37,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:37,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:50:37,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:50:37,862 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-09 10:50:37,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:37,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:37,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-09 10:50:37,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:38,117 INFO L124 PetriNetUnfolderBase]: 1773/3093 cut-off events. [2024-11-09 10:50:38,117 INFO L125 PetriNetUnfolderBase]: For 705/705 co-relation queries the response was YES. [2024-11-09 10:50:38,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6666 conditions, 3093 events. 1773/3093 cut-off events. For 705/705 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21376 event pairs, 249 based on Foata normal form. 208/3192 useless extension candidates. Maximal degree in co-relation 5454. Up to 1473 conditions per place. [2024-11-09 10:50:38,132 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 62 selfloop transitions, 6 changer transitions 1/84 dead transitions. [2024-11-09 10:50:38,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 84 transitions, 410 flow [2024-11-09 10:50:38,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:50:38,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:50:38,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-11-09 10:50:38,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-11-09 10:50:38,134 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 198 flow. Second operand 5 states and 178 transitions. [2024-11-09 10:50:38,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 84 transitions, 410 flow [2024-11-09 10:50:38,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 84 transitions, 401 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:38,135 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 204 flow [2024-11-09 10:50:38,136 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2024-11-09 10:50:38,136 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2024-11-09 10:50:38,136 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 204 flow [2024-11-09 10:50:38,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:38,136 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:38,137 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:38,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 10:50:38,137 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:38,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:38,137 INFO L85 PathProgramCache]: Analyzing trace with hash 2071444897, now seen corresponding path program 1 times [2024-11-09 10:50:38,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:38,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939609845] [2024-11-09 10:50:38,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:38,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:50:38,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:38,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939609845] [2024-11-09 10:50:38,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939609845] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:38,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:38,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:50:38,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631654166] [2024-11-09 10:50:38,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:38,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:50:38,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:38,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:50:38,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:50:38,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-09 10:50:38,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:38,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:38,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-09 10:50:38,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:38,668 INFO L124 PetriNetUnfolderBase]: 2041/3212 cut-off events. [2024-11-09 10:50:38,668 INFO L125 PetriNetUnfolderBase]: For 2193/2639 co-relation queries the response was YES. [2024-11-09 10:50:38,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8161 conditions, 3212 events. 2041/3212 cut-off events. For 2193/2639 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 19778 event pairs, 249 based on Foata normal form. 572/3756 useless extension candidates. Maximal degree in co-relation 8122. Up to 1940 conditions per place. [2024-11-09 10:50:38,692 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 69 selfloop transitions, 9 changer transitions 0/93 dead transitions. [2024-11-09 10:50:38,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 93 transitions, 476 flow [2024-11-09 10:50:38,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:50:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:50:38,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-11-09 10:50:38,694 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5494791666666666 [2024-11-09 10:50:38,695 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 204 flow. Second operand 6 states and 211 transitions. [2024-11-09 10:50:38,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 93 transitions, 476 flow [2024-11-09 10:50:38,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 463 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:50:38,699 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 257 flow [2024-11-09 10:50:38,699 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=257, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2024-11-09 10:50:38,700 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 4 predicate places. [2024-11-09 10:50:38,700 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 257 flow [2024-11-09 10:50:38,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:38,700 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:38,700 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:38,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 10:50:38,700 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:38,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:38,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1345613659, now seen corresponding path program 2 times [2024-11-09 10:50:38,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:38,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995057474] [2024-11-09 10:50:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:38,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:38,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:38,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995057474] [2024-11-09 10:50:38,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995057474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:38,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002043301] [2024-11-09 10:50:38,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:50:38,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:38,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:38,829 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) [2024-11-09 10:50:38,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:50:38,917 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:50:38,917 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:50:38,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 10:50:38,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:39,005 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:39,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002043301] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:39,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:50:39,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2024-11-09 10:50:39,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736188789] [2024-11-09 10:50:39,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:39,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:50:39,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:39,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:50:39,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:50:39,061 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 64 [2024-11-09 10:50:39,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:39,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:39,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 64 [2024-11-09 10:50:39,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:39,595 INFO L124 PetriNetUnfolderBase]: 4095/6330 cut-off events. [2024-11-09 10:50:39,596 INFO L125 PetriNetUnfolderBase]: For 6532/7194 co-relation queries the response was YES. [2024-11-09 10:50:39,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17619 conditions, 6330 events. 4095/6330 cut-off events. For 6532/7194 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 42534 event pairs, 501 based on Foata normal form. 680/6927 useless extension candidates. Maximal degree in co-relation 17577. Up to 1947 conditions per place. [2024-11-09 10:50:39,628 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 80 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2024-11-09 10:50:39,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 110 transitions, 617 flow [2024-11-09 10:50:39,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:50:39,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:50:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-11-09 10:50:39,629 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-09 10:50:39,630 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 257 flow. Second operand 6 states and 216 transitions. [2024-11-09 10:50:39,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 110 transitions, 617 flow [2024-11-09 10:50:39,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 601 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:39,634 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 361 flow [2024-11-09 10:50:39,634 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-11-09 10:50:39,635 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 10 predicate places. [2024-11-09 10:50:39,635 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 361 flow [2024-11-09 10:50:39,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:39,635 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:39,635 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:39,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:50:39,839 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,SelfDestructingSolverStorable12 [2024-11-09 10:50:39,840 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:39,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:39,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1352211191, now seen corresponding path program 1 times [2024-11-09 10:50:39,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:39,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118088157] [2024-11-09 10:50:39,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:39,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:40,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:40,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118088157] [2024-11-09 10:50:40,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118088157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:40,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55803927] [2024-11-09 10:50:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:40,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:40,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:40,372 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) [2024-11-09 10:50:40,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:50:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:40,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 10:50:40,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:40,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-09 10:50:40,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 10:50:40,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 10:50:40,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 10:50:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:40,762 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:40,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-11-09 10:50:40,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 10:50:41,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-11-09 10:50:41,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2024-11-09 10:50:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:41,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55803927] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:41,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:41,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-09 10:50:41,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573012476] [2024-11-09 10:50:41,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:41,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:50:41,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:41,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:50:41,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:50:41,453 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-09 10:50:41,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 361 flow. Second operand has 18 states, 18 states have (on average 29.555555555555557) internal successors, (532), 18 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:41,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:41,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-09 10:50:41,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:44,643 INFO L124 PetriNetUnfolderBase]: 10674/18279 cut-off events. [2024-11-09 10:50:44,644 INFO L125 PetriNetUnfolderBase]: For 47137/49502 co-relation queries the response was YES. [2024-11-09 10:50:44,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57532 conditions, 18279 events. 10674/18279 cut-off events. For 47137/49502 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 149258 event pairs, 417 based on Foata normal form. 1675/19517 useless extension candidates. Maximal degree in co-relation 29921. Up to 4950 conditions per place. [2024-11-09 10:50:44,785 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 277 selfloop transitions, 80 changer transitions 6/386 dead transitions. [2024-11-09 10:50:44,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 386 transitions, 2491 flow [2024-11-09 10:50:44,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 10:50:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-09 10:50:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1034 transitions. [2024-11-09 10:50:44,788 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5983796296296297 [2024-11-09 10:50:44,788 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 361 flow. Second operand 27 states and 1034 transitions. [2024-11-09 10:50:44,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 386 transitions, 2491 flow [2024-11-09 10:50:44,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 386 transitions, 2438 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-11-09 10:50:44,835 INFO L231 Difference]: Finished difference. Result has 112 places, 147 transitions, 1221 flow [2024-11-09 10:50:44,835 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1221, PETRI_PLACES=112, PETRI_TRANSITIONS=147} [2024-11-09 10:50:44,836 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 46 predicate places. [2024-11-09 10:50:44,836 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 147 transitions, 1221 flow [2024-11-09 10:50:44,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.555555555555557) internal successors, (532), 18 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:44,836 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:44,836 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:44,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:50:45,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:45,037 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:45,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:45,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1044612970, now seen corresponding path program 1 times [2024-11-09 10:50:45,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:45,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451887476] [2024-11-09 10:50:45,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:45,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:45,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:45,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451887476] [2024-11-09 10:50:45,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451887476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:45,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613768078] [2024-11-09 10:50:45,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:45,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:45,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:45,789 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) [2024-11-09 10:50:45,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:50:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:45,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 10:50:45,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:46,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 10:50:46,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 10:50:46,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-11-09 10:50:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:50:46,046 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:46,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:50:46,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-09 10:50:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:50:46,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613768078] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:46,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:46,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 5] total 16 [2024-11-09 10:50:46,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094528446] [2024-11-09 10:50:46,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:46,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:50:46,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:46,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:50:46,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:50:46,333 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-09 10:50:46,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 147 transitions, 1221 flow. Second operand has 17 states, 17 states have (on average 29.823529411764707) internal successors, (507), 17 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:46,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:46,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-09 10:50:46,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:48,979 INFO L124 PetriNetUnfolderBase]: 11955/20540 cut-off events. [2024-11-09 10:50:48,979 INFO L125 PetriNetUnfolderBase]: For 84540/86558 co-relation queries the response was YES. [2024-11-09 10:50:49,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71945 conditions, 20540 events. 11955/20540 cut-off events. For 84540/86558 co-relation queries the response was YES. Maximal size of possible extension queue 1184. Compared 173074 event pairs, 1113 based on Foata normal form. 1125/21231 useless extension candidates. Maximal degree in co-relation 68122. Up to 8941 conditions per place. [2024-11-09 10:50:49,171 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 154 selfloop transitions, 62 changer transitions 1/240 dead transitions. [2024-11-09 10:50:49,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 240 transitions, 2203 flow [2024-11-09 10:50:49,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 10:50:49,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-09 10:50:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 590 transitions. [2024-11-09 10:50:49,174 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5121527777777778 [2024-11-09 10:50:49,174 INFO L175 Difference]: Start difference. First operand has 112 places, 147 transitions, 1221 flow. Second operand 18 states and 590 transitions. [2024-11-09 10:50:49,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 240 transitions, 2203 flow [2024-11-09 10:50:49,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 240 transitions, 2125 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-11-09 10:50:49,735 INFO L231 Difference]: Finished difference. Result has 134 places, 171 transitions, 1605 flow [2024-11-09 10:50:49,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1605, PETRI_PLACES=134, PETRI_TRANSITIONS=171} [2024-11-09 10:50:49,735 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 68 predicate places. [2024-11-09 10:50:49,735 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 171 transitions, 1605 flow [2024-11-09 10:50:49,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 29.823529411764707) internal successors, (507), 17 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:49,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:49,736 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:49,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:50:49,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 10:50:49,937 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:49,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:49,937 INFO L85 PathProgramCache]: Analyzing trace with hash -868748429, now seen corresponding path program 2 times [2024-11-09 10:50:49,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:49,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961928709] [2024-11-09 10:50:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:49,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:50,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:50,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961928709] [2024-11-09 10:50:50,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961928709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:50,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714191474] [2024-11-09 10:50:50,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:50:50,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:50,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:50,040 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) [2024-11-09 10:50:50,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:50:50,135 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:50:50,136 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:50:50,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 10:50:50,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:50,173 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:50,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714191474] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:50,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:50,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2024-11-09 10:50:50,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089470662] [2024-11-09 10:50:50,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:50,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 10:50:50,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:50,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 10:50:50,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:50:50,274 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-09 10:50:50,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 171 transitions, 1605 flow. Second operand has 8 states, 8 states have (on average 32.75) internal successors, (262), 8 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:50,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:50,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-09 10:50:50,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:54,660 INFO L124 PetriNetUnfolderBase]: 19900/34307 cut-off events. [2024-11-09 10:50:54,661 INFO L125 PetriNetUnfolderBase]: For 133498/135905 co-relation queries the response was YES. [2024-11-09 10:50:54,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117342 conditions, 34307 events. 19900/34307 cut-off events. For 133498/135905 co-relation queries the response was YES. Maximal size of possible extension queue 1845. Compared 315122 event pairs, 2706 based on Foata normal form. 1606/34939 useless extension candidates. Maximal degree in co-relation 117254. Up to 14941 conditions per place. [2024-11-09 10:50:54,987 INFO L140 encePairwiseOnDemand]: 61/64 looper letters, 160 selfloop transitions, 59 changer transitions 0/242 dead transitions. [2024-11-09 10:50:54,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 242 transitions, 2513 flow [2024-11-09 10:50:54,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:50:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:50:54,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 172 transitions. [2024-11-09 10:50:54,988 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.671875 [2024-11-09 10:50:54,988 INFO L175 Difference]: Start difference. First operand has 134 places, 171 transitions, 1605 flow. Second operand 4 states and 172 transitions. [2024-11-09 10:50:54,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 242 transitions, 2513 flow [2024-11-09 10:50:55,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 242 transitions, 2433 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-11-09 10:50:55,643 INFO L231 Difference]: Finished difference. Result has 132 places, 190 transitions, 2007 flow [2024-11-09 10:50:55,644 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2007, PETRI_PLACES=132, PETRI_TRANSITIONS=190} [2024-11-09 10:50:55,644 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 66 predicate places. [2024-11-09 10:50:55,644 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 190 transitions, 2007 flow [2024-11-09 10:50:55,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.75) internal successors, (262), 8 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:55,644 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:55,645 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:55,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 10:50:55,848 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,SelfDestructingSolverStorable15 [2024-11-09 10:50:55,848 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:55,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:55,849 INFO L85 PathProgramCache]: Analyzing trace with hash -597106712, now seen corresponding path program 1 times [2024-11-09 10:50:55,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:55,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620907831] [2024-11-09 10:50:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:55,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:55,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:55,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620907831] [2024-11-09 10:50:55,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620907831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:55,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:55,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:50:55,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538830185] [2024-11-09 10:50:55,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:55,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:50:55,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:55,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:50:55,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:50:55,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-09 10:50:55,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 190 transitions, 2007 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:55,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:55,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-09 10:50:55,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:00,740 INFO L124 PetriNetUnfolderBase]: 22150/37156 cut-off events. [2024-11-09 10:51:00,741 INFO L125 PetriNetUnfolderBase]: For 196586/199694 co-relation queries the response was YES. [2024-11-09 10:51:01,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134897 conditions, 37156 events. 22150/37156 cut-off events. For 196586/199694 co-relation queries the response was YES. Maximal size of possible extension queue 1797. Compared 327623 event pairs, 8452 based on Foata normal form. 1794/37362 useless extension candidates. Maximal degree in co-relation 134808. Up to 17299 conditions per place. [2024-11-09 10:51:01,230 INFO L140 encePairwiseOnDemand]: 61/64 looper letters, 206 selfloop transitions, 11 changer transitions 0/240 dead transitions. [2024-11-09 10:51:01,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 240 transitions, 3026 flow [2024-11-09 10:51:01,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:51:01,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:51:01,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-11-09 10:51:01,231 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-09 10:51:01,231 INFO L175 Difference]: Start difference. First operand has 132 places, 190 transitions, 2007 flow. Second operand 3 states and 124 transitions. [2024-11-09 10:51:01,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 240 transitions, 3026 flow [2024-11-09 10:51:02,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 240 transitions, 2999 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-09 10:51:02,082 INFO L231 Difference]: Finished difference. Result has 134 places, 191 transitions, 2050 flow [2024-11-09 10:51:02,082 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2050, PETRI_PLACES=134, PETRI_TRANSITIONS=191} [2024-11-09 10:51:02,082 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 68 predicate places. [2024-11-09 10:51:02,082 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 191 transitions, 2050 flow [2024-11-09 10:51:02,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:02,083 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:02,083 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:02,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 10:51:02,083 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:51:02,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:02,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1243868511, now seen corresponding path program 3 times [2024-11-09 10:51:02,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:02,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919109063] [2024-11-09 10:51:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:02,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:02,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:02,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919109063] [2024-11-09 10:51:02,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919109063] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:02,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689618221] [2024-11-09 10:51:02,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:51:02,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:02,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:02,914 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) [2024-11-09 10:51:02,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:51:03,017 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 10:51:03,017 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:51:03,019 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 10:51:03,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:03,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 10:51:03,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 10:51:03,446 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:03,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 12 [2024-11-09 10:51:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:03,461 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:03,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:03,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 51 [2024-11-09 10:51:03,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 10:51:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:04,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689618221] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:04,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:04,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2024-11-09 10:51:04,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493267783] [2024-11-09 10:51:04,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:04,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 10:51:04,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:04,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 10:51:04,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2024-11-09 10:51:04,479 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-09 10:51:04,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 191 transitions, 2050 flow. Second operand has 28 states, 28 states have (on average 28.642857142857142) internal successors, (802), 28 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:04,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:04,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-09 10:51:04,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:19,844 INFO L124 PetriNetUnfolderBase]: 54007/90533 cut-off events. [2024-11-09 10:51:19,844 INFO L125 PetriNetUnfolderBase]: For 363119/369011 co-relation queries the response was YES. [2024-11-09 10:51:20,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321358 conditions, 90533 events. 54007/90533 cut-off events. For 363119/369011 co-relation queries the response was YES. Maximal size of possible extension queue 3617. Compared 857532 event pairs, 4302 based on Foata normal form. 3920/92896 useless extension candidates. Maximal degree in co-relation 321260. Up to 19990 conditions per place. [2024-11-09 10:51:21,224 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 557 selfloop transitions, 281 changer transitions 62/923 dead transitions. [2024-11-09 10:51:21,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 923 transitions, 8697 flow [2024-11-09 10:51:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-09 10:51:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2024-11-09 10:51:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2001 transitions. [2024-11-09 10:51:21,227 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5899174528301887 [2024-11-09 10:51:21,227 INFO L175 Difference]: Start difference. First operand has 134 places, 191 transitions, 2050 flow. Second operand 53 states and 2001 transitions. [2024-11-09 10:51:21,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 923 transitions, 8697 flow [2024-11-09 10:51:23,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 923 transitions, 8665 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:51:23,532 INFO L231 Difference]: Finished difference. Result has 212 places, 415 transitions, 5727 flow [2024-11-09 10:51:23,533 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=2039, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=5727, PETRI_PLACES=212, PETRI_TRANSITIONS=415} [2024-11-09 10:51:23,533 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 146 predicate places. [2024-11-09 10:51:23,533 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 415 transitions, 5727 flow [2024-11-09 10:51:23,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 28.642857142857142) internal successors, (802), 28 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:23,534 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:23,534 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:23,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 10:51:23,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 10:51:23,734 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:51:23,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:23,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1211427130, now seen corresponding path program 1 times [2024-11-09 10:51:23,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:23,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020949098] [2024-11-09 10:51:23,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:23,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:51:24,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:24,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020949098] [2024-11-09 10:51:24,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020949098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:24,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98254533] [2024-11-09 10:51:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:24,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:24,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:24,042 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) [2024-11-09 10:51:24,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:51:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:24,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 10:51:24,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:51:24,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:51:24,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98254533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:24,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:24,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 12] total 27 [2024-11-09 10:51:24,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401588012] [2024-11-09 10:51:24,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:24,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 10:51:24,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:24,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 10:51:24,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2024-11-09 10:51:24,931 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 64 [2024-11-09 10:51:24,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 415 transitions, 5727 flow. Second operand has 28 states, 28 states have (on average 18.892857142857142) internal successors, (529), 28 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:24,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:24,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 64 [2024-11-09 10:51:24,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand